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	<id>https://spudfiles.com/spud_wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=PCGUY</id>
	<title>SpudFiles Wiki - User contributions [en]</title>
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	<updated>2026-04-24T18:36:18Z</updated>
	<subtitle>User contributions</subtitle>
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	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:Users&amp;diff=4405</id>
		<title>SpudFiles Wiki:Users</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:Users&amp;diff=4405"/>
		<updated>2013-10-24T00:02:16Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: Created page with &amp;quot; == Wiki users are simply SpudFiles users.  If you do not have a SpudFiles account, please register [http://www.spudfiles.com/ucp.php?cid=&amp;amp;mode=register here]! ==&amp;quot;&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&lt;br /&gt;
== Wiki users are simply SpudFiles users.  If you do not have a SpudFiles account, please register [http://www.spudfiles.com/ucp.php?cid=&amp;amp;mode=register here]! ==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=User:PCGUY&amp;diff=4402</id>
		<title>User:PCGUY</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=User:PCGUY&amp;diff=4402"/>
		<updated>2013-10-16T03:13:48Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;PCGUY is the owner and administrator of http://www.spudfiles.com[&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:BB_machine_gun&amp;diff=4252</id>
		<title>Talk:BB machine gun</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:BB_machine_gun&amp;diff=4252"/>
		<updated>2010-12-09T02:40:23Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: Reverted edits by 193.105.210.174 (talk) to last revision by Jimmy101&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;6/2/08&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;Davidvaini&#039;&#039;&#039;, nice job on adding the airsoft data, it looks good.&lt;br /&gt;
&lt;br /&gt;
Could you add the barrel type and length and the air source pressure you used for the ROF and velocities you quoted? Are those numbers for a 120PSIG compressor or a CO2 setup? Perhaps a description of the ammo as well (6mm at 0.2g or 0.25g or ?). Is there a link you can add, perhaps to a post in the spudfiles forum, describing the particular gun?&lt;br /&gt;
&lt;br /&gt;
I made some changes to the hop-up portion. Feel free to nuke what I changed. I was trying to bend the discussion more towards a hop-up increasing the accuracy, which in turn increases the &#039;&#039;effective range&#039;&#039;. Instead of simply saying the hop-up increases the range. My understanding is that a hop-up actually decreases range somewhat, but the increased accuracy increases the &#039;&#039;effective range&#039;&#039;.&lt;br /&gt;
&lt;br /&gt;
I wonder if we should add a section comparing airsoft to copper/steel bbs? You really can&#039;t compare the performance based just on the muzzle velocity for the two ammos.&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;frontal areas:&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
6mm area=28mm^2&lt;br /&gt;
&lt;br /&gt;
0.177&amp;quot; (4.5mm) area=16mm^2&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;masses:&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
6mm airsoft = 0.2g or 0.25g or ...&lt;br /&gt;
&lt;br /&gt;
0.177&amp;quot; copper/steel bb = 0.33g&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;sectional densities:&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
0.2g or 0.25g 6mm airsoft = 0.007g/mm^2 or 0.009g/mm^2&lt;br /&gt;
&lt;br /&gt;
0.177&amp;quot; copper/steel bb = 0.02g/mm^2&lt;br /&gt;
&lt;br /&gt;
So, at the same muzzle velocities the copper/steel BB will have a higher muzzle energy and should carry farther (smaller sectional density) than the airsoft.&lt;br /&gt;
jimmy101&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:Main_Page&amp;diff=4251</id>
		<title>Talk:Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:Main_Page&amp;diff=4251"/>
		<updated>2010-12-09T02:39:57Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: Reverted edits by 81.94.27.214 (talk) to last revision by PCGUY&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;I moved (renamed) the entries on the different types of cannons to singular form ([[Combustion cannon]], [[Hybrid cannon]] etc), it&#039;s standard in wikis and makes linking much easier. Edit: removed capitalization in the titles as well, should not be used unless neccessary (such as in person names) since wiki is picky about capitals. I put redirects in place. --[[User:GalFisk|GalFisk]] 18 October 2005 04:22 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Formatting ==&lt;br /&gt;
&lt;br /&gt;
Question: should the preferred formatting of lists be like that on the cannon pages&lt;br /&gt;
 *item 1&lt;br /&gt;
 *item 2&lt;br /&gt;
 *etc&lt;br /&gt;
or the default one, like this&lt;br /&gt;
&lt;br /&gt;
*item 1&lt;br /&gt;
*item 2&lt;br /&gt;
*etc&lt;br /&gt;
&lt;br /&gt;
The second one is more common, but the first one has precedence on this page. I prefer the second one since it&#039;s more integrated with the rest of the text (same font/size) and think the other should be reserved for ascii drawings and the like that needs a monospace font. It would be nice to have a rule either way though, have the pages edited to correspond to that rule, and so set a consistant basis for future articles.&lt;br /&gt;
-- [[User:GalFisk|GalFisk]] 18 October 2005 09:04 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Whatever you please ==&lt;br /&gt;
 &lt;br /&gt;
If you think the second way is better then go with it.  I&#039;m still trying to get used to using a Wiki and it seems that you&#039;ve been on more than be so you&#039;ve had more experience.&lt;br /&gt;
 &lt;br /&gt;
Have fun :)&lt;br /&gt;
 &lt;br /&gt;
Thanks a lot.&lt;br /&gt;
:Ok, I&#039;ll change the formatting in the affected articles to the way I like it then. I&#039;ve edited a bit on Wikipedia and I enjoyed it, I&#039;ll be adding/fixing stuff here whenever I feel like it.&lt;br /&gt;
:I see that the box formatting can creep in by simply custting and pasting from Wikipedia, it&#039;s created by adding a space in front of a line and that can creep in during that operation for some reason.&lt;br /&gt;
:You can sign your posts by putting three tildes (&amp;lt;nowiki&amp;gt;~~~&amp;lt;/nowiki&amp;gt;) at the end, or sign it with date using four tildes. Remember to be logged in then of course. Preview is a good tool when trying out stuff.&lt;br /&gt;
:Result: [[User:GalFisk|GalFisk]] 18 October 2005 11:47 (CDT)&lt;br /&gt;
&lt;br /&gt;
== duplicate articals ==&lt;br /&gt;
&lt;br /&gt;
There are multiple articals that are exactly the same, but with slightly different names.&lt;br /&gt;
What&#039;s up with this?&lt;br /&gt;
:Some items redirect to other articles, if you search for [[ignition]] you&#039;re redirected to [[ignition source]] for instance. some articles were also renamed, when that is done a redirect is automatically placed on the old name. If you have been redirected, it will say so at the top of the page.&lt;br /&gt;
:The reason for having redirects is to make searching and linking easier, as well as not losing all previous links to a page if it gets renamed for some reason.&lt;br /&gt;
:If you find genuine duplicate identical articles, delete one and place a redirect from that to the other one. A redirect consists of the following text:&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;nowiki&amp;gt;#redirect [[article name]]&amp;lt;/nowiki&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:--[[User:GalFisk|GalFisk]] 18 October 2005 17:35 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Some info on how Wiki handles capital letters: ==&lt;br /&gt;
&lt;br /&gt;
The first letter in an article name will always be a capital letter. If you try to create an article on &amp;quot;psi&amp;quot; (which is the correct capitalization), it will be named &amp;quot;Psi&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
When linking, the first letter is treated the same whether it is capital or not. Both &amp;lt;nowiki&amp;gt;[[psi]] and [[Psi]]&amp;lt;/nowiki&amp;gt; will get you to the &amp;quot;Psi&amp;quot; article.&lt;br /&gt;
&lt;br /&gt;
This is not the case with capital letters elsewhere in the article name though, a link to &amp;lt;nowiki&amp;gt;[[PSI]]&amp;lt;/nowiki&amp;gt; will point to an article with the entire title in capitals.&lt;br /&gt;
&lt;br /&gt;
To create more confusion, the search function is less picky, a search for both &amp;quot;PSI&amp;quot; and &amp;quot;psi&amp;quot; will send you to the same article.&lt;br /&gt;
&lt;br /&gt;
Because of this, it&#039;s important not to use capital letters except where warranted. Valid cases are abbreviations ([[BBQ ignitor]], [[PVC]]), proper names, ([[The Spudgun Technology Center]], [[Gas Gun Design Tool]]), and other things that are normally written capitalized. If it&#039;s done both ways (many don&#039;t bother capitalizing either of these two), make a redirect from one version to the other.&lt;br /&gt;
&lt;br /&gt;
As a rule of thumb, only capitalize when it looks wrong if you don&#039;t.&lt;br /&gt;
&lt;br /&gt;
If you are unsure just go ahead and do it either way, if it&#039;s wrong someone will come along and fix it.&lt;br /&gt;
&lt;br /&gt;
i think linking to a particular post on spudtech is a bad idea, people may have to sign up.&lt;br /&gt;
&lt;br /&gt;
== Stubs, categories ==&lt;br /&gt;
&lt;br /&gt;
A &#039;&#039;&#039;stub&#039;&#039;&#039; is a short article where a lot of information could be added. To mark an article as a stub, add &amp;lt;nowiki&amp;gt;{{stub}}&amp;lt;/nowiki&amp;gt; at the bottom. A notice will be added that the article needs to be expanded. When you expand on a stub, you can remove the notice. All current stubs can be found in [[:Category:Stubs]]. [[The Spudgun Technology Center]] article is a good example, it&#039;s very short and a lot more can be written about it.&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;Categories&#039;&#039;&#039; are a way to automatically organize articles. When a new article is made, it can be added to a category by adding &amp;lt;nowiki&amp;gt;[[Category:Category name]]&amp;lt;/nowiki&amp;gt; at the bottom. An article should not be member of too many categories, only those to which is has a direct connection. For instance [[Pneumatic cannon]] could be a member of the category &amp;quot;cannons&amp;quot;, but should not be in the category &amp;quot;valves&amp;quot; or &amp;quot;construction materials&amp;quot;. And a valve fits perfectly in the category &amp;quot;valves&amp;quot;, but is unneccessary in &amp;quot;construction materials&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
To take an example, I just made the [[:Category:Valves]]. We could instead have had an article on [[valves]] which linked to all the valve articles, but that would mean this article would need to be updated each time a new &amp;quot;valve&amp;quot; article is added to stay current. By just adding the new article to the appropriate category, an up to date list is always maintained.&lt;br /&gt;
&lt;br /&gt;
An article on valves (Edit: called, for instance, [[valve]]) could be useful too of course, it should then link to the category for the listing of valves. I will be adding more categories and sort the current articles. If you find or write an article that fits in a current category, link it, and if you find that a particular useful category doesn&#039;t exist, you can create it, or put up a suggestion that it be created. &lt;br /&gt;
&lt;br /&gt;
Edit: Categories are by their nature in plural form, articles should be in singular where possible.&lt;br /&gt;
&lt;br /&gt;
A few useful templates also need to be added, such as one for footnotes. Unless someone else does it, I will as soon as I have found out how they work :)&lt;br /&gt;
&lt;br /&gt;
--[[User:GalFisk|GalFisk]] 24 October 2005 10:20 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Spam ==&lt;br /&gt;
&lt;br /&gt;
There has been a person repeatedly adding hidden links to various pakes including the main page. I&#039;ve reverted this vandalism several times now, it&#039;s a pretty quick job but it&#039;s getting annoying. The originating IP is different every time so I don&#039;t think an IP ban will be effective. &lt;br /&gt;
&lt;br /&gt;
One suggestion is to disable editing by people who are not logged in, would this be acceptable, or is there a better way? We&#039;ve also had many good edits from anonymous visitors, and it&#039;s easier for them to fix stuff on the spot if they&#039;re not required to log in. --[[User:GalFisk|GalFisk]] 8 March 2006 12:22 (CST)&lt;br /&gt;
:I blocked 209.123.8.145 for one week today after the third spamming from this IP. The spammer is evidently using a script, the same pages are changed in the same way every time and on some of them the script seems to fail, and only cuts the last few characters without adding anything. --[[User:GalFisk|GalFisk]] 03:06, 11 March 2006 (EST)&lt;br /&gt;
::I integrated the SpudFiles login with the Wiki login.  Now to register you must go through the normal SpudFiles register page and be verified by email.  You can also no longer make edits without being loged in. --[[User:PCGUY|PCGUY]] 11:34, 14 March 2006 (EST)&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_forum_guidelines&amp;diff=4250</id>
		<title>SpudFiles forum guidelines</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_forum_guidelines&amp;diff=4250"/>
		<updated>2010-12-09T02:37:36Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The following is documentation pertaining to the [http://www.spudfiles.com/ SpudFiles] forum.&lt;br /&gt;
&lt;br /&gt;
[[How-To]]&lt;br /&gt;
&lt;br /&gt;
[[Rules/ Suggestions]]&lt;br /&gt;
&lt;br /&gt;
[[Forum Code]]&lt;br /&gt;
&lt;br /&gt;
[[category:Website use]]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=4045</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=4045"/>
		<updated>2009-03-04T13:05:20Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Important &amp;amp; Related Links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;== The Spudding Handbook ==&lt;br /&gt;
Welcome to The Spudding Handbook!  This wiki format handbook contains all of the information you will ever need to build spudguns, and much more besides.  The purpose of this handbook is to explain the principles of spudguns and how they are built and operated.  All of the information contained in this handbook is free and available to anybody who wishes to view it.&lt;br /&gt;
&lt;br /&gt;
Look around and enjoy your stay.&lt;br /&gt;
--[[User:BC Pneumatics|BC Pneumatics]] 02:13, 31 May 2008 (EDT)&lt;br /&gt;
[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
==What is a Spudgun?==&lt;br /&gt;
&#039;&#039;Main article: [[What_is_a_spudgun%3F|What is a spudgun?]]&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
There are many different names for spudguns. They are called potato cannons, spud launchers, potato guns, spud cannons, and a host of others. Whatever you decide to call it, all of the aforementioned describe the same type of device: a device used to accelerate a [[potato]] down the [[barrel]], and launch it some distance. While it may offend some purists, the humble little potato is quickly losing favor to other ammunitions such as [[golf ball]]s, [[tennis ball]]s, and other cheap, uniform projectiles.&lt;br /&gt;
&lt;br /&gt;
==Types of Spudguns==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== [[Pneumatic_launcher|Pneumatic Launchers]] ===&lt;br /&gt;
&lt;br /&gt;
These use the energy stored in compressed gas to launch a projectile. The launcher&#039;s [[chamber]] is [[pressure|pressurized]] and the gas held back from the barrel by a [[valve]]. When the valve is opened the gas is allowed to rapidly expand and escape down the barrel forcing the projectile out before it.&lt;br /&gt;
&lt;br /&gt;
=== Combustion Launchers ===&lt;br /&gt;
&lt;br /&gt;
* &#039;&#039;&#039;[[Combustion_launcher|Regular Combustions]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
These find the energy needed to launch a projectile from the [[Combustion process|combustion]] of a gaseous [[fuel]] and air mixture. The fuel is added to the air already in the chamber, the chamber is sealed and the mixture ignited.  This combustion creates a pressure spike that forces the projectile out through the connected barrel.&lt;br /&gt;
&lt;br /&gt;
* &#039;&#039;&#039;[[Hybrid_launcher|Hybrid Launchers]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
Hybrid launchers are a special type of combustion launcher that use a pre-pressurised fuel/air mixture. This results in a higher pressure and hotter combustion on ignition, thereby transferring more energy to the projectile.&lt;br /&gt;
&lt;br /&gt;
=== [[BB Machine Gun]]s ===&lt;br /&gt;
A [[BB Machine Gun]] (BBMG) is a device designed to shoot a large volume of small diameter ammo, typically plastic airsoft or steel BBs. BBMGs are pneumatic guns but unlike single shot launchers they require a constant gas supply to function.&lt;br /&gt;
&lt;br /&gt;
==Important &amp;amp; Related Links==&lt;br /&gt;
&lt;br /&gt;
[[Index|Glossary/Index]]&lt;br /&gt;
&lt;br /&gt;
[[Good technical examples &amp;amp; articles]]&lt;br /&gt;
&lt;br /&gt;
[[Useful construction links]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[IPLA|International Potato Launching Association]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Ammunition]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]] (A Brief History of Spud Guns)&lt;br /&gt;
&lt;br /&gt;
[[SpudFiles forum guidelines]]&lt;br /&gt;
&lt;br /&gt;
[[Spudding Jokes]]&lt;br /&gt;
&lt;br /&gt;
[[Forum Stickies]] (Some of the most important topics on Spudfiles)&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://en.wikipedia.org/wiki/Spud_gun Wikipedia&#039;s page on spudguns]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/HGDT Hybrid Gun Design Tool, simulation program for hybrid/combustion guns]&lt;br /&gt;
*[http://www.spudfiles.com/forums/viewtopic.php?p=13324#13324 ATF Correspondence concerning spud gun legality]&lt;br /&gt;
*[http://www.spudfiles.com SpudFiles Forum (aka The Spud Cannon Database)]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=4044</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=4044"/>
		<updated>2009-03-04T13:05:08Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* External links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;== The Spudding Handbook ==&lt;br /&gt;
Welcome to The Spudding Handbook!  This wiki format handbook contains all of the information you will ever need to build spudguns, and much more besides.  The purpose of this handbook is to explain the principles of spudguns and how they are built and operated.  All of the information contained in this handbook is free and available to anybody who wishes to view it.&lt;br /&gt;
&lt;br /&gt;
Look around and enjoy your stay.&lt;br /&gt;
--[[User:BC Pneumatics|BC Pneumatics]] 02:13, 31 May 2008 (EDT)&lt;br /&gt;
[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
==What is a Spudgun?==&lt;br /&gt;
&#039;&#039;Main article: [[What_is_a_spudgun%3F|What is a spudgun?]]&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
There are many different names for spudguns. They are called potato cannons, spud launchers, potato guns, spud cannons, and a host of others. Whatever you decide to call it, all of the aforementioned describe the same type of device: a device used to accelerate a [[potato]] down the [[barrel]], and launch it some distance. While it may offend some purists, the humble little potato is quickly losing favor to other ammunitions such as [[golf ball]]s, [[tennis ball]]s, and other cheap, uniform projectiles.&lt;br /&gt;
&lt;br /&gt;
==Types of Spudguns==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== [[Pneumatic_launcher|Pneumatic Launchers]] ===&lt;br /&gt;
&lt;br /&gt;
These use the energy stored in compressed gas to launch a projectile. The launcher&#039;s [[chamber]] is [[pressure|pressurized]] and the gas held back from the barrel by a [[valve]]. When the valve is opened the gas is allowed to rapidly expand and escape down the barrel forcing the projectile out before it.&lt;br /&gt;
&lt;br /&gt;
=== Combustion Launchers ===&lt;br /&gt;
&lt;br /&gt;
* &#039;&#039;&#039;[[Combustion_launcher|Regular Combustions]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
These find the energy needed to launch a projectile from the [[Combustion process|combustion]] of a gaseous [[fuel]] and air mixture. The fuel is added to the air already in the chamber, the chamber is sealed and the mixture ignited.  This combustion creates a pressure spike that forces the projectile out through the connected barrel.&lt;br /&gt;
&lt;br /&gt;
* &#039;&#039;&#039;[[Hybrid_launcher|Hybrid Launchers]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
Hybrid launchers are a special type of combustion launcher that use a pre-pressurised fuel/air mixture. This results in a higher pressure and hotter combustion on ignition, thereby transferring more energy to the projectile.&lt;br /&gt;
&lt;br /&gt;
=== [[BB Machine Gun]]s ===&lt;br /&gt;
A [[BB Machine Gun]] (BBMG) is a device designed to shoot a large volume of small diameter ammo, typically plastic airsoft or steel BBs. BBMGs are pneumatic guns but unlike single shot launchers they require a constant gas supply to function.&lt;br /&gt;
&lt;br /&gt;
==Important &amp;amp; Related Links==&lt;br /&gt;
&lt;br /&gt;
[[Index|Glossary/Index]]&lt;br /&gt;
&lt;br /&gt;
[[BCARMS]]&lt;br /&gt;
&lt;br /&gt;
[[Good technical examples &amp;amp; articles]]&lt;br /&gt;
&lt;br /&gt;
[[Useful construction links]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[IPLA|International Potato Launching Association]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Ammunition]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]] (A Brief History of Spud Guns)&lt;br /&gt;
&lt;br /&gt;
[[SpudFiles forum guidelines]]&lt;br /&gt;
&lt;br /&gt;
[[Spudding Jokes]]&lt;br /&gt;
&lt;br /&gt;
[[Forum Stickies]] (Some of the most important topics on Spudfiles)&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://en.wikipedia.org/wiki/Spud_gun Wikipedia&#039;s page on spudguns]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/HGDT Hybrid Gun Design Tool, simulation program for hybrid/combustion guns]&lt;br /&gt;
*[http://www.spudfiles.com/forums/viewtopic.php?p=13324#13324 ATF Correspondence concerning spud gun legality]&lt;br /&gt;
*[http://www.spudfiles.com SpudFiles Forum (aka The Spud Cannon Database)]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=3988</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=3988"/>
		<updated>2008-11-04T17:23:32Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: Undo revision 3987 by SuperSpud (Talk)&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;== The Spudding Handbook ==&lt;br /&gt;
Welcome to The Spudding Handbook!  This wiki format handbook contains all of the information you will ever need to build spudguns, and much more besides.  The purpose of this handbook is to explain the principles of spudguns and how they are built and operated.  All of the information contained in this handbook is free and available to anybody who wishes to view it.&lt;br /&gt;
&lt;br /&gt;
Look around and enjoy your stay.&lt;br /&gt;
--[[User:BC Pneumatics|BC Pneumatics]] 02:13, 31 May 2008 (EDT)&lt;br /&gt;
[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
==What is a Spudgun?==&lt;br /&gt;
&#039;&#039;Main article: [[What_is_a_spudgun%3F|What is a spudgun?]]&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
There are many different names for spudguns. They are called potato cannons, spud launchers, potato guns, spud cannons, and a host of others. Whatever you decide to call it, all of the aforementioned describe the same type of device: a device used to accelerate a [[potato]] down the [[barrel]], and launch it some distance. While it may offend some purists, the humble little potato is quickly losing favor to other ammunitions such as [[golf ball]]s, [[tennis ball]]s, and other cheap, uniform projectiles.&lt;br /&gt;
&lt;br /&gt;
==Types of Spudguns==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== [[Pneumatic_launcher|Pneumatic Launchers]] ===&lt;br /&gt;
&lt;br /&gt;
These use the energy stored in compressed gas to launch a projectile. The launcher&#039;s [[chamber]] is [[pressure|pressurized]] and the gas held back from the barrel by a [[valve]]. When the valve is opened the gas is allowed to rapidly expand and escape down the barrel forcing the projectile out before it.&lt;br /&gt;
&lt;br /&gt;
=== Combustion Launchers ===&lt;br /&gt;
&lt;br /&gt;
* &#039;&#039;&#039;[[Combustion_launcher|Regular Combustions]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
These find the energy needed to launch a projectile from the [[Combustion process|combustion]] of a gaseous [[fuel]] and air mixture. The fuel is added to the air already in the chamber, the chamber is sealed and the mixture ignited.  This combustion creates a pressure spike that forces the projectile out through the connected barrel.&lt;br /&gt;
&lt;br /&gt;
* &#039;&#039;&#039;[[Hybrid_launcher|Hybrid Launchers]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
Hybrid launchers are a special type of combustion launcher that use a pre-pressurised fuel/air mixture. This results in a higher pressure and hotter combustion on ignition, thereby transferring more energy to the projectile.&lt;br /&gt;
&lt;br /&gt;
=== [[BB Machine Gun]]s ===&lt;br /&gt;
A [[BB Machine Gun]] (BBMG) is a device designed to shoot a large volume of small diameter ammo, typically plastic airsoft or steel BBs. BBMGs are pneumatic guns but unlike single shot launchers they require a constant gas supply to function.&lt;br /&gt;
&lt;br /&gt;
==Important &amp;amp; Related Links==&lt;br /&gt;
&lt;br /&gt;
[[Index|Glossary/Index]]&lt;br /&gt;
&lt;br /&gt;
[[BCARMS]]&lt;br /&gt;
&lt;br /&gt;
[[Useful construction links]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[IPLA|International Potato Launching Association]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Ammunition]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]] (A Brief History of Spud Guns)&lt;br /&gt;
&lt;br /&gt;
[[SpudFiles forum guidelines]]&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://en.wikipedia.org/wiki/Spud_gun Wikipedia&#039;s page on spudguns]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/forums/viewtopic.php?p=13324#13324 ATF Correspondence concerning spud gun legality]&lt;br /&gt;
*[http://www.spudfiles.com SpudFiles Forum (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.BCARMS.com BCARMS - Spud Cannon Parts, Accessories, Kits and Launchers]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=3588</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=3588"/>
		<updated>2008-04-09T16:49:27Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* External links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;=== The Spudding Handbook ===&lt;br /&gt;
Provided by the users of [http://www.spudfiles.com SpudFiles]&lt;br /&gt;
&lt;br /&gt;
This Spudwiki is here for you to learn about the spudgun hobby. &lt;br /&gt;
All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-&#039;&#039;PCGUY (Kyle), maker of SpudFiles&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
==What you can learn here==&lt;br /&gt;
&lt;br /&gt;
Here you can learn all about:&lt;br /&gt;
* [[What_is_a_spudgun%3F|What a spudgun is]] and how it works.&lt;br /&gt;
* The different types of spudgun.&lt;br /&gt;
* How to use and [[Cannon construction|construct]] your spudgun well - [[Safety|safely]] and reliably.&lt;br /&gt;
** How to build each type of spudgun, and [[FAQ|which might be best for you]].&lt;br /&gt;
** The right [[Construction_materials|materials]] to use.&lt;br /&gt;
** The basic rules of shooting, loading and caring for your launcher.&lt;br /&gt;
* How to make basic spudding accessories like breech loaders, and how to fit pressure gauges.&lt;br /&gt;
* What types of [[Common_Fuels_for_Combustion_Spudguns|fuel to use for your combustion spudgun]], as well as the types of [[Ignition_source|ignition]].&lt;br /&gt;
* What [[Pneumatic_cannon|valves]] you can use for your pneumatics.&lt;br /&gt;
* There is advice on good and bad types of [[projectile]]s for you to use&lt;br /&gt;
* How [[Legal issues|legal]] your cannon is. &lt;br /&gt;
* And a lot more besides.&lt;br /&gt;
&lt;br /&gt;
Above all you will be able to find instructions on how to build things that you will love for years to come. &lt;br /&gt;
&lt;br /&gt;
==What is a spudgun?==&lt;br /&gt;
[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
&#039;&#039;Main article: [[What_is_a_spudgun%3F|What is a spudgun?]]&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
In short, a spudgun is a general term used to describe home-made recreational launching devices. The name is a little misleading, because in fact, many launchers will never launch a potato, but it&#039;s a name that&#039;s stuck.&lt;br /&gt;
&lt;br /&gt;
They also go by several other names, commonly also called spud/potato/produce - guns/zookas/huckers/launchers/cannons. &lt;br /&gt;
A lot of people commonly just call them &amp;quot;Launchers&amp;quot; or &amp;quot;Cannons&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
==Types of spudgun==&lt;br /&gt;
&lt;br /&gt;
So far, hobbyist launchers can be grouped into:&lt;br /&gt;
* A main category of &#039;&#039;&#039;pressure&#039;&#039;&#039; based launchers. &lt;br /&gt;
* A rare sub-group of &#039;&#039;&#039;electromagnetic&#039;&#039;&#039; launchers. &lt;br /&gt;
&lt;br /&gt;
The vast majority fall into the former category, as they tend to be more powerful, as well as easier and cheaper to build.&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;Pressure&#039;&#039;&#039; based launchers can be sorted into two sub groups: &lt;br /&gt;
*&#039;&#039;&#039;Pre-compressed air&#039;&#039;&#039; powered, where air at greater than atmospheric pressure is used:&lt;br /&gt;
** [[Pneumatic cannon]]s &lt;br /&gt;
** [[BB machine gun]]s&lt;br /&gt;
* &#039;&#039;&#039;Flammable gas&#039;&#039;&#039; powered, where the pressure is generated by the heat from combustion of flammable vapours:&lt;br /&gt;
**[[Combustion cannon]]s&lt;br /&gt;
**[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
The rarer &#039;&#039;&#039;electromagnetic&#039;&#039;&#039; launchers fall into three sub groups:&lt;br /&gt;
* &#039;&#039;&#039;Induction&#039;&#039;&#039; (Railguns, Induction coilguns), where the projectile is under a repulsive force.&lt;br /&gt;
* &#039;&#039;&#039;Reluctance&#039;&#039;&#039; (Most Coil/Gauss guns), where the projectile is under an attractive force.&lt;br /&gt;
* &#039;&#039;&#039;Electro-thermal&#039;&#039;&#039;/&#039;&#039;&#039;Electro-thermal-chemical&#039;&#039;&#039;, where electrical power is used to generate heated gasses to provide force.&lt;br /&gt;
&lt;br /&gt;
==Important &amp;amp; Related Links==&lt;br /&gt;
&lt;br /&gt;
[[Index|Glossary/Index]]&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Useful construction links]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[IPLA|International Potato Launching Association]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]] (A Brief History of Spud Guns)&lt;br /&gt;
&lt;br /&gt;
[[SpudFiles forum guidelines]]&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://en.wikipedia.org/wiki/Spud_gun Wikipedia&#039;s page on spudguns]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/forums/viewtopic.php?p=13324#13324 ATF Correspondence concerning spud gun legality]&lt;br /&gt;
*[http://www.spudfiles.com SpudFiles Forum (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.uksgc.co.uk/forums/  UK Spudgun Community (UKSGC) - The place for UK Spudgunning]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=3478</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=3478"/>
		<updated>2008-02-07T14:56:15Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== The Spudding Handbook ===&lt;br /&gt;
Provided by the users of [http://www.spudfiles.com SpudFiles]&lt;br /&gt;
----&lt;br /&gt;
&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;Types of spudguns:&#039;&#039;&#039;&lt;br /&gt;
* [[Combustion cannon]]s&lt;br /&gt;
* [[Pneumatic cannon]]s&lt;br /&gt;
* [[Hybrid cannon]]s&lt;br /&gt;
* [[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Useful construction links]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[IPLA]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]] (A Brief History of Spud Guns)&lt;br /&gt;
&lt;br /&gt;
[[SpudFiles forum guidelines]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY (Kyle), maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.uksgc.co.uk/forums/  UK Spudgun Community The place for UK Spudgunning]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:555_timer&amp;diff=3343</id>
		<title>Talk:555 timer</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:555_timer&amp;diff=3343"/>
		<updated>2007-06-05T22:07:45Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* why? */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;----&lt;br /&gt;
Who are you?  Stamp your signature so we know who is talking and when.&lt;br /&gt;
&lt;br /&gt;
The page was deleted because it caused a ton of errors on the page due to the way it was formatted.  It appears to be working fine now, so the page is back up.&lt;br /&gt;
--[[User:PCGUY|PCGUY]] 18:07, 5 June 2007 (EDT)&lt;br /&gt;
----&lt;br /&gt;
&lt;br /&gt;
== why? ==&lt;br /&gt;
&lt;br /&gt;
why did u delete this? it is perfectly fine to copy from wikipedia, the GNU lets us.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
----&lt;br /&gt;
It looks like the website throws an error when the page is viewed.&lt;br /&gt;
&lt;br /&gt;
Anyone happen to know why?  It&#039;s something to do with how the page was formatted... some of you guys know more about Wiki editing than I do.&lt;br /&gt;
--[[User:PCGUY|PCGUY]] 00:56, 6 January 2007 (EST)&lt;br /&gt;
&lt;br /&gt;
:The spud wiki didn&#039;t like the foreign letters in one of the links at the bottom, so I removed it (they were not useful here anyways). I&#039;ll see if I can give this article a major rewrite, to cover only the parts that are of interest to us. --[[User:GalFisk|GalFisk]] 04:43, 6 January 2007 (EST)&lt;br /&gt;
&lt;br /&gt;
----&lt;br /&gt;
Uit has a bunch of internal links that were ment for wikipedia but serve no purpose here. Can we see abou getting rid of some?&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:555_timer&amp;diff=3074</id>
		<title>Talk:555 timer</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:555_timer&amp;diff=3074"/>
		<updated>2007-01-06T05:56:54Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* why? */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;== why? ==&lt;br /&gt;
&lt;br /&gt;
why did u delete this? it is perfectly fine to copy from wikipedia, the GNU lets us.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
----&lt;br /&gt;
It looks like the website throws an error when the page is viewed.&lt;br /&gt;
&lt;br /&gt;
Anyone happen to know why?  It&#039;s something to do with how the page was formatted... some of you guys know more about Wiki editing than I do.&lt;br /&gt;
--[[User:PCGUY|PCGUY]] 00:56, 6 January 2007 (EST)&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=555_timer&amp;diff=3073</id>
		<title>555 timer</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=555_timer&amp;diff=3073"/>
		<updated>2007-01-06T05:55:15Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Signetics NE555N.JPG|thumb|right|NE555 from [[Signetics]] in [[Dual in-line package|dual-in-line package]]]]&lt;br /&gt;
[[Image:555-schem.png|frame|right|Schematic symbol of the 555 timer]]&lt;br /&gt;
The &#039;&#039;&#039;555&#039;&#039;&#039; is an [[integrated circuit]] (chip) implementing a variety of [[timer]] and [[multivibrator]] applications. The IC was designed and invented by [[Hans R. Camenzind]]. It was designed in [[1970]] and introduced in [[1971]] by [[Signetics]] (later acquired by [[Philips]]). The original name was the SE555/&#039;&#039;&#039;NE555&#039;&#039;&#039; and was called &amp;quot;The IC Time Machine&amp;quot;. It is still in wide use, thanks to its ease of use, low price and good stability. Even today, [[Samsung]] in [[Korea]] manufactures over 1 [[billion]] units per year ([[As of 2003|2003]]).&lt;br /&gt;
&lt;br /&gt;
The 555 timer is one of the most popular and versatile integrated circuits ever produced. It includes 23 [[transistor]]s, 2 [[diode]]s and 16 [[resistor]]s on a silicon chip installed in an 8-pin mini dual-in-line package ([[Dual in-line package|DIP]]). The 556 is a 14-pin DIP that combines two 555s on a single chip. The 558 is a 16-pin DIP that combines four, slightly modified, 555s on a single chip (DIS &amp;amp; THR are connected internally, TR is falling edge sensitive instead of level sensitive). Also available are ultra-low power versions of the 555 such as the 7555. The 7555 requires slightly different wiring using fewer external components and less power.&lt;br /&gt;
&lt;br /&gt;
The 555 has three operating modes:&lt;br /&gt;
*[[Monostable]] mode: in this mode, the 555 functions as a &amp;quot;one-shot&amp;quot;. Applications include timers, missing pulse detection, bouncefree switches, touch switches, etc.&lt;br /&gt;
*[[Astable]] mode: the 555 can operate as an [[oscillator]]. Uses include [[LED]] and lamp flashers, pulse generation, logic clocks, tone generation, security alarms, etc.&lt;br /&gt;
*[[Bistable]] mode: the 555 can operate as a [[Flip-flop (electronics)|flip-flop]], if the DIS pin is not connected and no capacitor is used. Uses include bouncefree latched switches, etc.&lt;br /&gt;
&lt;br /&gt;
==Usage==&lt;br /&gt;
The connection of the pins is as follows:&lt;br /&gt;
{| border=1&lt;br /&gt;
! Nr. !! Name !! Purpose&lt;br /&gt;
|-&lt;br /&gt;
| 1 || GND || &#039;&#039;&#039;G&#039;&#039;&#039;rou&#039;&#039;&#039;nd&#039;&#039;&#039;, low level&lt;br /&gt;
|-&lt;br /&gt;
| 2 || TR  || A short pulse high-&amp;gt;low on the &#039;&#039;&#039;tr&#039;&#039;&#039;igger starts the timer&lt;br /&gt;
|-&lt;br /&gt;
| 3 || Q   || During a timing interval, the &#039;&#039;&#039;o&#039;&#039;&#039;utput stays at [[Vcc|+V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt;]]&lt;br /&gt;
|-&lt;br /&gt;
| 4 || R   || A timing interval can be interrupted by applying a &#039;&#039;&#039;r&#039;&#039;&#039;eset pulse to low (0V)&lt;br /&gt;
|-&lt;br /&gt;
| 5 || CV  || &#039;&#039;&#039;C&#039;&#039;&#039;ontrol &#039;&#039;&#039;v&#039;&#039;&#039;oltage allows access to the internal voltage divider (2/3 V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt;)&lt;br /&gt;
|-&lt;br /&gt;
| 6 || THR || The &#039;&#039;&#039;thr&#039;&#039;&#039;eshold at which the interval ends (it ends if U.thr &amp;gt; 2/3 V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt;)&lt;br /&gt;
|-&lt;br /&gt;
| 7 || DIS || Connected to a capacitor whose &#039;&#039;&#039;dis&#039;&#039;&#039;charge time will influence the timing interval&lt;br /&gt;
|-&lt;br /&gt;
| 8 || V+, V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt; || The positive supply &#039;&#039;&#039;v&#039;&#039;&#039;oltage which must be between 5 and 15 V, high level&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
Using simply a [[capacitor]] and a [[resistor]], the timing interval, i.e. the time during which the output stays low, can be adjusted to the need of the specific application. An example configuration is shown below:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;center&amp;gt;[[Image:555-schem-2.png|Example 555 schematic]]&amp;lt;br /&amp;gt;Example 555 schematic &amp;lt;/center&amp;gt;&lt;br /&gt;
&lt;br /&gt;
The interval time &#039;&#039;t&#039;&#039; is given by&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;t = RC&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
which is the time it takes to charge C to 63% of the applied voltage (exact figure: &#039;&#039;(1-1/e)V&#039;&#039;). See [[RC circuit]] for an explanation of this effect.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
In the astable mode, the high time from each pulse is given by&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;high = 0.69 \cdot (R1 + R2) \cdot C&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
and the low time from each pulse is given by&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;math&amp;gt;low = 0.69 \cdot R2 \cdot C&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
where R1 and R2 are the values of the resistor in [[ohm]]s and C is the value of the capacitor in [[farad]]s.&lt;br /&gt;
&lt;br /&gt;
==Specifications==&lt;br /&gt;
These specifications apply to the NE555. Other 555 timers can have better specifications depending on the grade (military, medical, etc).&lt;br /&gt;
&lt;br /&gt;
{| border=1 cellpadding=2&lt;br /&gt;
|Supply voltage (V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt;)&lt;br /&gt;
|4.5 to 15 V&lt;br /&gt;
|-&lt;br /&gt;
|Supply current (V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt; = +5 V)&lt;br /&gt;
|3 to 6 mA&lt;br /&gt;
|-&lt;br /&gt;
|Supply current (V&amp;lt;sub&amp;gt;CC&amp;lt;/sub&amp;gt; = +15 V)&lt;br /&gt;
|10 to 15 mA&lt;br /&gt;
|-&lt;br /&gt;
|Output current (maximum)&lt;br /&gt;
|200 mA&lt;br /&gt;
|-&lt;br /&gt;
|Power dissipation&lt;br /&gt;
|600 mW&lt;br /&gt;
|-&lt;br /&gt;
|Operating temperature&lt;br /&gt;
|0 to 70° C&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Derivatives==&lt;br /&gt;
&lt;br /&gt;
Many pin-compatible variants, including [[CMOS]] versions, have been built by various companies. The 555 is also known under the following type numbers:&lt;br /&gt;
&lt;br /&gt;
{| border=&amp;quot;1&amp;quot; cellpadding=&amp;quot;2&amp;quot;&lt;br /&gt;
!Manufacturer&lt;br /&gt;
!Model&lt;br /&gt;
!Remark&lt;br /&gt;
|-&lt;br /&gt;
|ECG Philips&lt;br /&gt;
|ECG955M&lt;br /&gt;
|-&lt;br /&gt;
|Exar&lt;br /&gt;
|XR-555&lt;br /&gt;
|-&lt;br /&gt;
|Fairchild&lt;br /&gt;
|NE555/KA555&lt;br /&gt;
|-&lt;br /&gt;
|Harris&lt;br /&gt;
|HA555&lt;br /&gt;
|-&lt;br /&gt;
|Intersil&lt;br /&gt;
|SE555/NE555/ICM7555&lt;br /&gt;
|-&lt;br /&gt;
|Lithic Systems&lt;br /&gt;
|LC555&lt;br /&gt;
|-&lt;br /&gt;
|Maxim&lt;br /&gt;
|ICM7555&lt;br /&gt;
|-&lt;br /&gt;
|Motorola&lt;br /&gt;
|MC1455/MC1555&lt;br /&gt;
|-&lt;br /&gt;
|National&lt;br /&gt;
|LM1455/LM555C&lt;br /&gt;
|-&lt;br /&gt;
|NTE Sylvania&lt;br /&gt;
|NTE955M&lt;br /&gt;
|-&lt;br /&gt;
|Raytheon&lt;br /&gt;
|RM555/RC555&lt;br /&gt;
|-&lt;br /&gt;
|RCA&lt;br /&gt;
|CA555/CA555C&lt;br /&gt;
|-&lt;br /&gt;
|Sanyo&lt;br /&gt;
|LC7555&lt;br /&gt;
|-&lt;br /&gt;
|Texas Instruments&lt;br /&gt;
|SN52555/SN72555; TLC555&lt;br /&gt;
|-&lt;br /&gt;
|USSR&lt;br /&gt;
|K1006ВИ1&lt;br /&gt;
|-&lt;br /&gt;
|Zetex&lt;br /&gt;
|ZSCT1555&lt;br /&gt;
|down to 0.9V&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
*[http://www.uoguelph.ca/~antoon/gadgets/555/555.html 555 Timer Tutorial]&lt;br /&gt;
*[http://www.fairchildsemi.com/ds/NE/NE555.pdf Data Sheet (Fairchild) (PDF)]&lt;br /&gt;
*[http://www.falstad.com/circuit/ex-555.html Java simulation] of 555 oscillator circuit&lt;br /&gt;
*[http://www.datasheetarchive.com/search.php?q=NE555&amp;amp;sType=part&amp;amp;ExactDS=Starts 1972 Signetics NE555 datasheet (PDF)]&lt;br /&gt;
&lt;br /&gt;
[[Category:Integrated circuits]]&lt;br /&gt;
&lt;br /&gt;
[[da:555 timer ic]]&lt;br /&gt;
[[de:NE555]]&lt;br /&gt;
[[es:Circuito integrado 555]]&lt;br /&gt;
[[it:NE555]]&lt;br /&gt;
[[lt:NE 555]]&lt;br /&gt;
[[nl:555 timer IC]]&lt;br /&gt;
[[pt:CI 555]]&lt;br /&gt;
[[sk:NE555]]&lt;br /&gt;
[[th:ไอซี 555]]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=3019</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=3019"/>
		<updated>2006-11-09T03:38:39Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* ProMeterSuite */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typically within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquefaction of the propeller gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combinations. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[ProMeterSuite]]==&lt;br /&gt;
Spud Calculators galore. Requires Microsoft Excel. [http://www.spudfiles.com/uploader/uploadFiles/ProMeterSuite.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes. [http://www.digitaldutch.com/unitconverter/ UnitConverter]&lt;br /&gt;
&lt;br /&gt;
==[[Launcher Range Calculator]]==&lt;br /&gt;
Predicts ballistic trajectory accurately taking into account both atmospheric and ballistic variables. [http://bb.1asphost.com/sigmarhaven/SSpictures/launchers/LauncherRangeCalculatorV2-2.xls Download]&lt;br /&gt;
&lt;br /&gt;
==[[Other Calculators]]==&lt;br /&gt;
[http://www.burntlatke.com/calc.html http://www.burntlatke.com/calc.html]&lt;br /&gt;
&lt;br /&gt;
[http://www.joshmadison.com/software/ http://www.joshmadison.com/software/]&lt;br /&gt;
&lt;br /&gt;
[http://www.1728.com/diam.htm http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=3018</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=3018"/>
		<updated>2006-11-09T03:37:08Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Unit Converter */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typically within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquefaction of the propeller gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combinations. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[ProMeterSuite]]==&lt;br /&gt;
Spud Calculators galore. Requires Microsoft Excel. [http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes. [http://www.digitaldutch.com/unitconverter/ UnitConverter]&lt;br /&gt;
&lt;br /&gt;
==[[Launcher Range Calculator]]==&lt;br /&gt;
Predicts ballistic trajectory accurately taking into account both atmospheric and ballistic variables. [http://bb.1asphost.com/sigmarhaven/SSpictures/launchers/LauncherRangeCalculatorV2-2.xls Download]&lt;br /&gt;
&lt;br /&gt;
==[[Other Calculators]]==&lt;br /&gt;
[http://www.burntlatke.com/calc.html http://www.burntlatke.com/calc.html]&lt;br /&gt;
&lt;br /&gt;
[http://www.joshmadison.com/software/ http://www.joshmadison.com/software/]&lt;br /&gt;
&lt;br /&gt;
[http://www.1728.com/diam.htm http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=3017</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=3017"/>
		<updated>2006-11-09T03:36:52Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Unit Converter */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typically within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquefaction of the propeller gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combinations. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[ProMeterSuite]]==&lt;br /&gt;
Spud Calculators galore. Requires Microsoft Excel. [http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes. [http://www.digitaldutch.com/unitconverter/]&lt;br /&gt;
&lt;br /&gt;
==[[Launcher Range Calculator]]==&lt;br /&gt;
Predicts ballistic trajectory accurately taking into account both atmospheric and ballistic variables. [http://bb.1asphost.com/sigmarhaven/SSpictures/launchers/LauncherRangeCalculatorV2-2.xls Download]&lt;br /&gt;
&lt;br /&gt;
==[[Other Calculators]]==&lt;br /&gt;
[http://www.burntlatke.com/calc.html http://www.burntlatke.com/calc.html]&lt;br /&gt;
&lt;br /&gt;
[http://www.joshmadison.com/software/ http://www.joshmadison.com/software/]&lt;br /&gt;
&lt;br /&gt;
[http://www.1728.com/diam.htm http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:Supah-Valve&amp;diff=2533</id>
		<title>Talk:Supah-Valve</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:Supah-Valve&amp;diff=2533"/>
		<updated>2006-07-17T07:29:12Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&lt;br /&gt;
== OMG ==&lt;br /&gt;
&lt;br /&gt;
Is this really a good idea?&lt;br /&gt;
&lt;br /&gt;
== OMGWTFBBQ ==&lt;br /&gt;
Information should be available and tonymann22 also thought it was a good idea.&lt;br /&gt;
It also shows the correct way a piston valve should be constructed.&lt;br /&gt;
Lastly, it shows that the Supah is not only beautiful on the outside, but on the inside as well.&lt;br /&gt;
Questions?&lt;br /&gt;
&lt;br /&gt;
==Leave It==&lt;br /&gt;
It&#039;s fine, the only real place you don&#039;t want this sort of info is on the SpudTech site it&#039;s self, since that is &amp;quot;the home of the valve&amp;quot; you could say.&lt;br /&gt;
--[[User:PCGUY|PCGUY]] 03:29, 17 July 2006 (EDT)&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:Supah-Valve&amp;diff=2532</id>
		<title>Talk:Supah-Valve</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:Supah-Valve&amp;diff=2532"/>
		<updated>2006-07-17T07:28:41Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&lt;br /&gt;
== OMG ==&lt;br /&gt;
&lt;br /&gt;
Is this really a good idea?&lt;br /&gt;
&lt;br /&gt;
== OMGWTFBBQ ==&lt;br /&gt;
Information should be available and tonymann22 also thought it was a good idea.&lt;br /&gt;
It also shows the correct way a piston valve should be constructed.&lt;br /&gt;
Lastly, it shows that the Supah is not only beautiful on the outside, but on the inside as well.&lt;br /&gt;
Questions?&lt;br /&gt;
&lt;br /&gt;
==Leave It==&lt;br /&gt;
It&#039;s fine, the only real place you don&#039;t want this sort of info is on the SpudTech site it&#039;s self, since that is &amp;quot;the home of the valve&amp;quot; you could say.&lt;br /&gt;
--[[User:PCGUY|PCGUY]] 03:28, 17 July 2006 (EDT)&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2519</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2519"/>
		<updated>2006-07-02T04:29:06Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== The Spudding Handbook ===&lt;br /&gt;
Provided By The Users of [http://www.spudfiles.com SpudFiles]&lt;br /&gt;
----&lt;br /&gt;
&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY (Kyle), maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2383</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2383"/>
		<updated>2006-04-04T16:06:47Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Other Caculators */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typcialy within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquification of the propellent gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combustions. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[ProMeterSuite]]==&lt;br /&gt;
Spud Caculators galore. Requires Microsoft Excel. [http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes. [http://www.spudfiles.com/Main/download_stuff/UnitConverter.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Other Caculators]]==&lt;br /&gt;
[http://burntlatke.quibble.com/calc.html http://burntlatke.quibble.com/calc.html]&lt;br /&gt;
&lt;br /&gt;
[http://www.joshmadison.com/software/ http://www.joshmadison.com/software/]&lt;br /&gt;
&lt;br /&gt;
[http://www.1728.com/diam.htm http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2382</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2382"/>
		<updated>2006-04-04T16:05:38Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* http://www.spudfiles.com/Main/download_stuff/UnitConverter.zip Unit Converter */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typcialy within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquification of the propellent gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combustions. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[ProMeterSuite]]==&lt;br /&gt;
Spud Caculators galore. Requires Microsoft Excel. [http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes. [http://www.spudfiles.com/Main/download_stuff/UnitConverter.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[Other Caculators]]==&lt;br /&gt;
[http://burntlatke.quibble.com/calc.html]&lt;br /&gt;
[http://www.joshmadison.com/software/]&lt;br /&gt;
[http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2381</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2381"/>
		<updated>2006-04-04T16:04:57Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip ProMeterSuite */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typcialy within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquification of the propellent gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combustions. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[ProMeterSuite]]==&lt;br /&gt;
Spud Caculators galore. Requires Microsoft Excel. [http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip Download]&lt;br /&gt;
&lt;br /&gt;
==[[http://www.spudfiles.com/Main/download_stuff/UnitConverter.zip Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes.&lt;br /&gt;
&lt;br /&gt;
==[[Other Caculators]]==&lt;br /&gt;
[http://burntlatke.quibble.com/calc.html]&lt;br /&gt;
[http://www.joshmadison.com/software/]&lt;br /&gt;
[http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2380</id>
		<title>Computer Applications</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Computer_Applications&amp;diff=2380"/>
		<updated>2006-04-04T16:04:06Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The certain members of the spudding community have written computer programs pertaining to spudguns:&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==the [[GGDT|Gas Gun Design Tool]]==&lt;br /&gt;
Written by David Hall (D_hall of the [[SGTC]]), it is the most commonly used program to predict [[pneumatic cannon]] performance, and is free for the download at Hall&#039;s [http://www1.iwvisp.com/thehalls/ggdt/index.html website].&lt;br /&gt;
&lt;br /&gt;
Accuracy of the predictions is typcialy within 5-10% of the actual value, although there has not been much testing of very long where the (unaccounted for) flow resistance due to barrel length is significant, or very high pressure launchers where the non-modeled liquification of the propellent gas(ses) may take place.&lt;br /&gt;
&lt;br /&gt;
==[[CALM]]==&lt;br /&gt;
Standing for &amp;lt;b&amp;gt;Compressed Air Launcher Model&amp;lt;/b&amp;gt; this is a Pneumatic Launcher simulator program by AKB of the [[SGTC]]. Since it is written in the Python programming language you can read the code and see how it works. It is not graphical, but produces tables of pressure, velocity, height, etc.&lt;br /&gt;
&lt;br /&gt;
CALM can be downloaded at http://www.qsl.net/wb6zqz/calm.html .&lt;br /&gt;
&lt;br /&gt;
==[[EVBEC]]==&lt;br /&gt;
EVBEC stands for Energy &amp;amp; Volume Based Estimator for Combustions. Written by boilingleadbath, it is based on [http://www.burntlatke.com Latke&#039;s] chamber:barrel test data.&lt;br /&gt;
&lt;br /&gt;
==[[SpudTool]]==&lt;br /&gt;
A great spudding tool made by Boogieman. [http://www.advancedspuds.com/SpudToolonline.htm Click here to try it out]&lt;br /&gt;
&lt;br /&gt;
==[[http://www.spudfiles.com/Main/download_stuff/ProMeterSuite.zip ProMeterSuite]]==&lt;br /&gt;
Spud Caculators galore. Requires Microsoft Excel.&lt;br /&gt;
&lt;br /&gt;
==[[http://www.spudfiles.com/Main/download_stuff/UnitConverter.zip Unit Converter]]==&lt;br /&gt;
I just found this a long time ago and is really handy when converting metric pipe sizes to U.S. sizes.&lt;br /&gt;
&lt;br /&gt;
==[[Other Caculators]]==&lt;br /&gt;
[http://burntlatke.quibble.com/calc.html]&lt;br /&gt;
[http://www.joshmadison.com/software/]&lt;br /&gt;
[http://www.1728.com/diam.htm]&lt;br /&gt;
&lt;br /&gt;
==Works in progress==&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2379</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2379"/>
		<updated>2006-04-04T15:54:54Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== The Spudding Handbook ===&lt;br /&gt;
Provided By The Users of [http://www.spudfiles.com SpudFiles]&lt;br /&gt;
----&lt;br /&gt;
&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:Potato&amp;diff=2330</id>
		<title>Talk:Potato</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:Potato&amp;diff=2330"/>
		<updated>2006-03-15T21:29:07Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;Thanks Galfisk, i&#039;m still trying to get used to Wiki editing.&lt;br /&gt;
--[[User:PCGUY|PCGUY]] 16:29, 15 March 2006 (EST)&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Potato&amp;diff=2324</id>
		<title>Potato</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Potato&amp;diff=2324"/>
		<updated>2006-03-14T22:21:27Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Potato.jpg|frame|Some standard potatos.]]&lt;br /&gt;
&lt;br /&gt;
The potato (aka spud), the most common and original ammo for a spud cannon.  Typically large and juicy ones are perfered, this is because the size is needed for larger barrels and the juice acts as a lubricant in the barrel when muzzle loaded.  Also when muzzle loaded, the spud is typically forced into the barrel that has a [[Muzzle Knife]] on the end.  When this is done, the spud is shaved to a perfect fit for the barrel which makes an air tight seal.&lt;br /&gt;
&lt;br /&gt;
Potatos are also typically fairly cheap and can be found anywhere, thus why it started as the original ammo.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Potato&amp;diff=2323</id>
		<title>Potato</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Potato&amp;diff=2323"/>
		<updated>2006-03-14T22:19:44Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Potato.jpg|frame|Some standard potatos.]]&lt;br /&gt;
&lt;br /&gt;
The potato (aka spud), the most common and original ammo for a spud cannon.  Typically large and juicy ones are perfered, this is because the size is needed for larger barrels and the juice acts as a lubricant in the barrel when muzzle loaded.  Also when muzzle loaded, the spud is typically forced into the barrel that has a [Muzzle Knife] on the end.  When this is done, the spud is shaved to a perfect fit for the barrel which makes an air tight seal.&lt;br /&gt;
&lt;br /&gt;
Potatos are also typically fairly cheap and can be found anywhere, thus why it started as the original ammo.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Potato&amp;diff=2322</id>
		<title>Potato</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Potato&amp;diff=2322"/>
		<updated>2006-03-14T22:18:57Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Potato.jpg]]&lt;br /&gt;
&lt;br /&gt;
The potato (aka spud), the most common and original ammo for a spud cannon.  Typically large and juicy ones are perfered, this is because the size is needed for larger barrels and the juice acts as a lubricant in the barrel when muzzle loaded.  Also when muzzle loaded, the spud is typically forced into the barrel that has a [Muzzle Knife] on the end.  When this is done, the spud is shaved to a perfect fit for the barrel which makes an air tight seal.&lt;br /&gt;
&lt;br /&gt;
Potatos are also typically fairly cheap and can be found anywhere, thus why it started as the original ammo.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=File:Potato.jpg&amp;diff=2321</id>
		<title>File:Potato.jpg</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=File:Potato.jpg&amp;diff=2321"/>
		<updated>2006-03-14T22:18:15Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: Some standard Potatos.&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;Some standard Potatos.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:General_disclaimer&amp;diff=2320</id>
		<title>SpudFiles Wiki:General disclaimer</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:General_disclaimer&amp;diff=2320"/>
		<updated>2006-03-14T22:06:14Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;=Disclaimer=&lt;br /&gt;
&lt;br /&gt;
All Information Given Is For EDUCATIONAL PURPOSES ONLY!&lt;br /&gt;
&lt;br /&gt;
You view and interpret material from this web site SOLELY AT YOUR OWN RISK.&lt;br /&gt;
&lt;br /&gt;
It should also be understood that the use of plastic water pipe (PVC, ABS, or any other) for spud cannons is one of the MOST WRONG things you can do with the pipe. Accidents are rare however, as most people follow generally accepted safe practices through proper solvent welding, and conservative fuel usage. Using “high power” fuels such as acetylene and/or nitrous oxide or pure oxygen as oxidizers is highly discouraged. Low environmental temperatures (below freezing) also makes plastic pipe far more brittle, so accidents happen more frequently in colder air. If you choose not to take into account the risks of spud cannons, I feel no sympathy to you when you blow yourself into bits.&lt;br /&gt;
&lt;br /&gt;
This Disclaimer Does Not cover misuse, accident, lightning, flood, tornado, tsunami, volcanic eruption, earthquake, hurricanes or any other Acts Of God. Read As Directed. Slippery When Wet. Do not mutilate or puncture. Skin Irritation May Arise. Wash Hands After Use. If problems consist, Contact Doctor Because Ur Sick! We are not held liable for that. Batteries Not Included. For External use Only. Use Only With Proper Ventilation. Move Along people there is nothing to see here. Thank you for your time!&lt;br /&gt;
&lt;br /&gt;
By viewing the material provided via spudfiles.com you are stating that you understand the risks of a spud gun and you are smart enough not to get hurt or hurt anything else. Also, you are stating that if you do anything harmful with your spud gun, I am not responsible what&#039;s so ever.&lt;br /&gt;
&lt;br /&gt;
If you do not agree please [http://www.google.com leave now], or forever hold your bodily pieces.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:About&amp;diff=2319</id>
		<title>SpudFiles Wiki:About</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:About&amp;diff=2319"/>
		<updated>2006-03-14T22:03:55Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;The SpudFiles Wiki was the idea of the users of SpudFiles to create a handbook of sorts to help people with spud cannons all the way from the novice to the advanced spudder.&lt;br /&gt;
&lt;br /&gt;
I finally got it up and running and it&#039;s going great.  You can thank the users of SpudFiles for making this Wiki what it is.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=User:PCGUY&amp;diff=2318</id>
		<title>User:PCGUY</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=User:PCGUY&amp;diff=2318"/>
		<updated>2006-03-14T22:01:01Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;PCGuy is the owner and admin of spudfiles.com, and also an of the spudtech.com forums.&lt;br /&gt;
&lt;br /&gt;
More info and contact info can be found [http://www.spudfiles.com/forums/profile.php?mode=viewprofile&amp;amp;u=2&amp;amp; right here].&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Talk:Main_Page&amp;diff=2317</id>
		<title>Talk:Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Talk:Main_Page&amp;diff=2317"/>
		<updated>2006-03-14T17:42:47Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Spam */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;I moved (renamed) the entries on the different types of cannons to singular form ([[Combustion cannon]], [[Hybrid cannon]] etc), it&#039;s standard in wikis and makes linking much easier. Edit: removed capitalization in the titles as well, should not be used unless neccessary (such as in person names) since wiki is picky about capitals. I put redirects in place. --[[User:GalFisk|GalFisk]] 18 October 2005 04:22 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Formatting ==&lt;br /&gt;
&lt;br /&gt;
Question: should the preferred formatting of lists be like that on the cannon pages&lt;br /&gt;
 *item 1&lt;br /&gt;
 *item 2&lt;br /&gt;
 *etc&lt;br /&gt;
or the default one, like this&lt;br /&gt;
&lt;br /&gt;
*item 1&lt;br /&gt;
*item 2&lt;br /&gt;
*etc&lt;br /&gt;
&lt;br /&gt;
The second one is more common, but the first one has precedence on this page. I prefer the second one since it&#039;s more integrated with the rest of the text (same font/size) and think the other should be reserved for ascii drawings and the like that needs a monospace font. It would be nice to have a rule either way though, have the pages edited to correspond to that rule, and so set a consistant basis for future articles.&lt;br /&gt;
-- [[User:GalFisk|GalFisk]] 18 October 2005 09:04 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Whatever you please ==&lt;br /&gt;
 &lt;br /&gt;
If you think the second way is better then go with it.  I&#039;m still trying to get used to using a Wiki and it seems that you&#039;ve been on more than be so you&#039;ve had more experience.&lt;br /&gt;
 &lt;br /&gt;
Have fun :)&lt;br /&gt;
 &lt;br /&gt;
Thanks a lot.&lt;br /&gt;
:Ok, I&#039;ll change the formatting in the affected articles to the way I like it then. I&#039;ve edited a bit on Wikipedia and I enjoyed it, I&#039;ll be adding/fixing stuff here whenever I feel like it.&lt;br /&gt;
:I see that the box formatting can creep in by simply custting and pasting from Wikipedia, it&#039;s created by adding a space in front of a line and that can creep in during that operation for some reason.&lt;br /&gt;
:You can sign your posts by putting three tildes (&amp;lt;nowiki&amp;gt;~~~&amp;lt;/nowiki&amp;gt;) at the end, or sign it with date using four tildes. Remember to be logged in then of course. Preview is a good tool when trying out stuff.&lt;br /&gt;
:Result: [[User:GalFisk|GalFisk]] 18 October 2005 11:47 (CDT)&lt;br /&gt;
&lt;br /&gt;
== duplicate articals ==&lt;br /&gt;
&lt;br /&gt;
There are multiple articals that are exactly the same, but with slightly different names.&lt;br /&gt;
What&#039;s up with this?&lt;br /&gt;
:Some items redirect to other articles, if you search for [[ignition]] you&#039;re redirected to [[ignition source]] for instance. some articles were also renamed, when that is done a redirect is automatically placed on the old name. If you have been redirected, it will say so at the top of the page.&lt;br /&gt;
:The reason for having redirects is to make searching and linking easier, as well as not losing all previous links to a page if it gets renamed for some reason.&lt;br /&gt;
:If you find genuine duplicate identical articles, delete one and place a redirect from that to the other one. A redirect consists of the following text:&lt;br /&gt;
&lt;br /&gt;
:&amp;lt;nowiki&amp;gt;#redirect [[article name]]&amp;lt;/nowiki&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:--[[User:GalFisk|GalFisk]] 18 October 2005 17:35 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Some info on how Wiki handles capital letters: ==&lt;br /&gt;
&lt;br /&gt;
The first letter in an article name will always be a capital letter. If you try to create an article on &amp;quot;psi&amp;quot; (which is the correct capitalization), it will be named &amp;quot;Psi&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
When linking, the first letter is treated the same whether it is capital or not. Both &amp;lt;nowiki&amp;gt;[[psi]] and [[Psi]]&amp;lt;/nowiki&amp;gt; will get you to the &amp;quot;Psi&amp;quot; article.&lt;br /&gt;
&lt;br /&gt;
This is not the case with capital letters elsewhere in the article name though, a link to &amp;lt;nowiki&amp;gt;[[PSI]]&amp;lt;/nowiki&amp;gt; will point to an article with the entire title in capitals.&lt;br /&gt;
&lt;br /&gt;
To create more confusion, the search function is less picky, a search for both &amp;quot;PSI&amp;quot; and &amp;quot;psi&amp;quot; will send you to the same article.&lt;br /&gt;
&lt;br /&gt;
Because of this, it&#039;s important not to use capital letters except where warranted. Valid cases are abbreviations ([[BBQ ignitor]], [[PVC]]), proper names, ([[The Spudgun Technology Center]], [[Gas Gun Design Tool]]), and other things that are normally written capitalized. If it&#039;s done both ways (many don&#039;t bother capitalizing either of these two), make a redirect from one version to the other.&lt;br /&gt;
&lt;br /&gt;
As a rule of thumb, only capitalize when it looks wrong if you don&#039;t.&lt;br /&gt;
&lt;br /&gt;
If you are unsure just go ahead and do it either way, if it&#039;s wrong someone will come along and fix it.&lt;br /&gt;
&lt;br /&gt;
i think linking to a particular post on spudtech is a bad idea, people may have to sign up.&lt;br /&gt;
&lt;br /&gt;
== Stubs, categories ==&lt;br /&gt;
&lt;br /&gt;
A &#039;&#039;&#039;stub&#039;&#039;&#039; is a short article where a lot of information could be added. To mark an article as a stub, add &amp;lt;nowiki&amp;gt;{{stub}}&amp;lt;/nowiki&amp;gt; at the bottom. A notice will be added that the article needs to be expanded. When you expand on a stub, you can remove the notice. All current stubs can be found in [[:Category:Stubs]]. [[The Spudgun Technology Center]] article is a good example, it&#039;s very short and a lot more can be written about it.&lt;br /&gt;
&lt;br /&gt;
&#039;&#039;&#039;Categories&#039;&#039;&#039; are a way to automatically organize articles. When a new article is made, it can be added to a category by adding &amp;lt;nowiki&amp;gt;[[Category:Category name]]&amp;lt;/nowiki&amp;gt; at the bottom. An article should not be member of too many categories, only those to which is has a direct connection. For instance [[Pneumatic cannon]] could be a member of the category &amp;quot;cannons&amp;quot;, but should not be in the category &amp;quot;valves&amp;quot; or &amp;quot;construction materials&amp;quot;. And a valve fits perfectly in the category &amp;quot;valves&amp;quot;, but is unneccessary in &amp;quot;construction materials&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
To take an example, I just made the [[:Category:Valves]]. We could instead have had an article on [[valves]] which linked to all the valve articles, but that would mean this article would need to be updated each time a new &amp;quot;valve&amp;quot; article is added to stay current. By just adding the new article to the appropriate category, an up to date list is always maintained.&lt;br /&gt;
&lt;br /&gt;
An article on valves (Edit: called, for instance, [[valve]]) could be useful too of course, it should then link to the category for the listing of valves. I will be adding more categories and sort the current articles. If you find or write an article that fits in a current category, link it, and if you find that a particular useful category doesn&#039;t exist, you can create it, or put up a suggestion that it be created. &lt;br /&gt;
&lt;br /&gt;
Edit: Categories are by their nature in plural form, articles should be in singular where possible.&lt;br /&gt;
&lt;br /&gt;
A few useful templates also need to be added, such as one for footnotes. Unless someone else does it, I will as soon as I have found out how they work :)&lt;br /&gt;
&lt;br /&gt;
--[[User:GalFisk|GalFisk]] 24 October 2005 10:20 (CDT)&lt;br /&gt;
&lt;br /&gt;
== Spam ==&lt;br /&gt;
&lt;br /&gt;
There has been a person repeatedly adding hidden links to various pakes including the main page. I&#039;ve reverted this vandalism several times now, it&#039;s a pretty quick job but it&#039;s getting annoying. The originating IP is different every time so I don&#039;t think an IP ban will be effective. &lt;br /&gt;
&lt;br /&gt;
One suggestion is to disable editing by people who are not logged in, would this be acceptable, or is there a better way? We&#039;ve also had many good edits from anonymous visitors, and it&#039;s easier for them to fix stuff on the spot if they&#039;re not required to log in. --[[User:GalFisk|GalFisk]] 8 March 2006 12:22 (CST)&lt;br /&gt;
:I blocked 209.123.8.145 for one week today after the third spamming from this IP. The spammer is evidently using a script, the same pages are changed in the same way every time and on some of them the script seems to fail, and only cuts the last few characters without adding anything. --[[User:GalFisk|GalFisk]] 03:06, 11 March 2006 (EST)&lt;br /&gt;
::I integrated the SpudFiles login with the Wiki login.  Now to register you must go through the normal SpudFiles register page and be verified by email.  You can also no longer make edits without being loged in. --[[User:PCGUY|PCGUY]] 11:34, 14 March 2006 (EST)&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Legal_issues&amp;diff=2284</id>
		<title>Legal issues</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Legal_issues&amp;diff=2284"/>
		<updated>2006-03-10T20:31:02Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Australia */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;==United States of America==&lt;br /&gt;
===Letter from the ATF===&lt;br /&gt;
The bureau of alchohol, tobacco, and firearms sent the [[SGTC]] the following letter.&lt;br /&gt;
Another version with pictures can be found [http://www.spudfiles.com/Other/are_they_legal.php here].&lt;br /&gt;
&lt;br /&gt;
&amp;lt;blockquote&amp;gt;&lt;br /&gt;
Department of the Treasury&lt;br /&gt;
&lt;br /&gt;
Bureau of Alcohol, Tobacco, and Firearms&lt;br /&gt;
&lt;br /&gt;
Washington, DC 20226&lt;br /&gt;
&lt;br /&gt;
As defined in section 921(a) (3) of Title 18, United States Code (USC) the term &amp;quot;firearm&amp;quot; means --&lt;br /&gt;
&lt;br /&gt;
    * (A) any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive;&lt;br /&gt;
    * (B) the frame or receiver of any such weapon;&lt;br /&gt;
    * (C) any firearm muffler or firearm silencer; or&lt;br /&gt;
    * (D) any destructive device. Such term does not include an antique firearm. &lt;br /&gt;
&lt;br /&gt;
As defined in 26 USC subsection 5845(f) (2) the term destructive device includes any type of weapon by whatever name known which will, or which may readily be converted to, expel a projectile by the action of an explosive or other propellent, the barrel or barrels of which have a bore of more than one-half inch in diameter, except a shotgun or shotgun shell which the Secretary or his delegate finds is generally recognized as particularly suitable for sporting purposes; and (3) any combination of parts either designed or intended for use in converting any device into a destructive device as defined in subparagraphs (1) and (2) and from which a destructive device may be readily assembled. The term &#039;destructive device&#039; shall not include any device which is neither designed nor redesigned for use as a weapon; any device, although originally designed for use as a weapon, which is redesigned for use as a signaling, pyrotechnic, line throwing, safety, or similar device; surplus ordnance sold, loaned, or given by the Secretary of the Army pursuant to the provisions of section 4684(2), 4685, or 4686 of title 10 of the USC; or any other device which the Secretary of the Treasury or his delegate finds is not likely to be used as a weapon, or is an antique or is a rifle which the owner intends to use solely for sporting purposes.&lt;br /&gt;
&lt;br /&gt;
It is unlawful for anyone to make or possess a destructive device which is not registered in accordance with the provisions of the National Firearms Act.&lt;br /&gt;
&lt;br /&gt;
We have previously examined that certain muzzle loading devices known as &amp;quot;potato guns.&amp;quot; These potato guns are constructed from PVC plastic tubing. They use hair spray or a similar aerosol substance for a propellant, and have some type of spark ignitor. We have determined that these devices, as described, are not firearms provided that they are used solely for launching potatoes for recreational purposes. However, any such devices which are used as weapons or used to launch other forms of projectiles may be firearms and destructive devices as defined.&lt;br /&gt;
&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
===Interpretation of the ATF letter===&lt;br /&gt;
&amp;quot;other forms of projectiles&amp;quot; is typicaly interpreted to mean flamable, and/or explosive projectiles; ie, that &amp;quot;potatoes&amp;quot; was an example of an acceptable projectile, and not the only option.&lt;br /&gt;
&lt;br /&gt;
===State, County, and City laws===&lt;br /&gt;
These vary. Generaly, it is illegal to shoot a spudgun inside city limmits.&lt;br /&gt;
The owner of the SGTC provides the following advice: &amp;quot;&amp;lt;i&amp;gt;If it is ok to shoot a shotgun in your particular location....you will have no problem with your spudgun.&amp;lt;/i&amp;gt;&amp;quot;&lt;br /&gt;
&lt;br /&gt;
*In Glendale, Arizona and Phoenix, Arizona combustion spudguns are considered firearms.&lt;br /&gt;
Subject: RE: potato gun legality&lt;br /&gt;
The legality of potato guns are as follows. If the potato is expelled&lt;br /&gt;
by the use of air it is OK. If any explosion occurred from gas, powder,&lt;br /&gt;
etc. it is illegal and cannot be fired. The &amp;quot;firearm&amp;quot; definition is&lt;br /&gt;
what dictates this.&lt;br /&gt;
&lt;br /&gt;
==Other countries==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== Australia ===&lt;br /&gt;
&lt;br /&gt;
Information taken from my (Julz) posts on Spudfiles Forums. This information is as accurate as possible, however, may not be entirely correct as I did not speak to anybody of authority, I gained my information only from government web sites.&lt;br /&gt;
&lt;br /&gt;
Please note, nowhere did I read that spudguns were definantly legal. Assumptions that they are legal are made on the basis that in a detailed list of prohibited weapons spudguns were not mentioned.&lt;br /&gt;
&lt;br /&gt;
I am not responsible for any trouble you get into as a result of this information.&lt;br /&gt;
&lt;br /&gt;
For the original posts, see [http://www.spudfiles.com/forums/viewtopic.php?p=1305&amp;amp;lighter=&amp;amp;#1305 here]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Victoria----&amp;gt;Legal?  -  I could find no referance to spud guns etc in this page, detailing prohibited weapons.&lt;br /&gt;
[http://www.justice.vic.gov.au/CA2569020010922A/OrigDoc/~AF15C6429D88D005CA256C1D0016321D?OpenDocument&amp;amp;1=0-Safety~&amp;amp;2=0-Crime+Prevention~&amp;amp;3=0-Information+about+Prohibited+Weapons~ Long Link]&lt;br /&gt;
&lt;br /&gt;
New South Wales----&amp;gt;Illegal  -  Requires a permit that cannot be gained without a legitemate reason for possessing the cannon.&lt;br /&gt;
Quote:&lt;br /&gt;
Item 2(3) Any device that is designed to propel or launch a bomb, grenade, rocket or missile by any means other than by&lt;br /&gt;
means of an explosive, including a device known as a PVC cannon.&lt;br /&gt;
&lt;br /&gt;
http://www.police.nsw.gov.au/__data/assets/file/5232/Prohibited_Weapons_General_Permit.pdf&lt;br /&gt;
&lt;br /&gt;
Australian Capital Territory----&amp;gt;Legal?  -  I could find no referance to spud guns etc in this page, detailing prohibited weapons.&lt;br /&gt;
http://www.legislation.act.gov.au/b/db_14541/19960829-16540/pdf/db_14541.pdf&lt;br /&gt;
&lt;br /&gt;
South Australia----&amp;gt;? I could find no referance to spud guns etc in this page, detailing prohibited weapons.&lt;br /&gt;
http://www.sapolice.sa.gov.au/firearms/prohib_weapon/weapon_type.shtml&lt;br /&gt;
&lt;br /&gt;
Northern Territory----&amp;gt;Unknown I could not find any page detailing what weapond are prohibited.&lt;br /&gt;
&lt;br /&gt;
Western Australia----&amp;gt;Illegal&lt;br /&gt;
&lt;br /&gt;
Quote: F23 Can I have a spud gun?&lt;br /&gt;
&lt;br /&gt;
No, as a spud gun is deemed to be a firearm within the definition of a firearm under the Firearms Act 1973 amended 1996.&lt;br /&gt;
&lt;br /&gt;
http://www.police.wa.gov.au/Services/FirearmsandWeapons.asp?FrequentlyAskedQuestions#F23&lt;br /&gt;
&lt;br /&gt;
Queensland----&amp;gt;Unknown I could not find any page detailing what weapond are prohibited.&lt;br /&gt;
&lt;br /&gt;
Tasmania----&amp;gt;Unknown I could not find any page detailing what weapond are prohibited.&lt;br /&gt;
&lt;br /&gt;
update on 2006/02/04 by Mountaineer&lt;br /&gt;
Under Australian Law, a spud gun would be considered either a Compressed Air Gun (Class &#039;A&#039;) or a Muzzle Loading Firearm (Class &#039;B&#039;) depending on the propellant being used in the individual device.&lt;br /&gt;
This is something of a moot point however as any home-made firearm falls under Prescribed Firearms legislation.&lt;br /&gt;
Other examples of Prescribed Firearms include fully automatic weapons, modified firearms (sawn-off etc), silenced firearms, disguised firearms and firearms designed to fire explosive or incendiary devices such as bazookas and mortars.&lt;br /&gt;
There are a few exception to the Prescribed Firearms legislation, mainly related to weapons made and used in theatrical productions.&lt;br /&gt;
Theoretically, a registered gun owner with (for example) a Class &#039;B&#039; license could have a gunsmith make a spud gun for them which could then be registered and legally used under purpose 2 (Target Shooting - unsupervised) of Australian law.  However I find it hard to imagine anyone doing that when they could simply buy a &amp;quot;real&amp;quot; gun.&lt;br /&gt;
I got all this information from &amp;quot;Firearms &amp;amp; the Law in South Australia&amp;quot; (c) 2004 Regency Publishing ISBN: 1 86393 404 9 which I am currently studying for my own license.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2283</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2283"/>
		<updated>2006-03-10T20:26:36Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* The Spudding Handbook */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== The Spudding Handbook ===&lt;br /&gt;
Provided By The Users of [http://www.spudfiles.com SpudFiles]&lt;br /&gt;
----&lt;br /&gt;
&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications|Computer simulators]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.freewebtown.com/flyingsloths/portal Spudgun information and concepts]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2282</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2282"/>
		<updated>2006-03-10T20:26:08Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
=== The Spudding Handbook ===&lt;br /&gt;
===== Provided By The Users of [http://www.spudfiles.com SpudFiles] =====&lt;br /&gt;
----&lt;br /&gt;
&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications|Computer simulators]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.freewebtown.com/flyingsloths/portal Spudgun information and concepts]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2281</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2281"/>
		<updated>2006-03-10T20:13:35Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* External links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications|Computer simulators]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.freewebtown.com/flyingsloths/portal Spudgun information and concepts]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2280</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2280"/>
		<updated>2006-03-10T19:46:59Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications|Computer simulators]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.utopia.bcpneumatics.com Utopia, video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.freewebtown.com/flyingsloths/portal Spudgun information and concepts]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=File:Cannon.jpg&amp;diff=2279</id>
		<title>File:Cannon.jpg</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=File:Cannon.jpg&amp;diff=2279"/>
		<updated>2006-03-10T19:45:27Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: A Combustion Cannon&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;A Combustion Cannon&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2278</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2278"/>
		<updated>2006-03-10T19:37:11Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* External links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications|Computer simulators]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.utopia.bcpneumatics.com Utopia, video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.freewebtown.com/flyingsloths/portal Spudgun information and concepts]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2277</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=2277"/>
		<updated>2006-03-10T19:36:56Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* External links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Computer Applications|Computer simulators]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
Yeap&lt;br /&gt;
&lt;br /&gt;
*[http://www.utopia.bcpneumatics.com Utopia, video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;br /&gt;
*[http://www.freewebtown.com/flyingsloths/portal Spudgun information and concepts]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1926</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1926"/>
		<updated>2005-11-14T00:43:25Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* External links */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctelly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
*[http://www.utopia.bcpneumatics.com Utopia, video tutorials (in part by PCGUY)]&lt;br /&gt;
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]&lt;br /&gt;
*[http://www1.iwvisp.com/thehalls/ggdt Gas Gun Design Tool, simulation program for pneumatic guns]&lt;br /&gt;
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]&lt;br /&gt;
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]&lt;br /&gt;
*[http://www.spudtech.com Great source of spudgun information]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Legal_issues&amp;diff=1881</id>
		<title>Legal issues</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Legal_issues&amp;diff=1881"/>
		<updated>2005-10-27T15:51:35Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: /* Letter from the ATF */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;==United States of America==&lt;br /&gt;
===Letter from the ATF===&lt;br /&gt;
The bureau of alchohol, tobacco, and firearms sent the [[SGTC]] the following letter.&lt;br /&gt;
Another version with pictures can be found [http://www.spudfiles.com/Other/are_they_legal.php here].&lt;br /&gt;
&lt;br /&gt;
&amp;lt;blockquote&amp;gt;&lt;br /&gt;
Department of the Treasury&lt;br /&gt;
&lt;br /&gt;
Bureau of Alcohol, Tobacco, and Firearms&lt;br /&gt;
&lt;br /&gt;
Washington, DC 20226&lt;br /&gt;
&lt;br /&gt;
As defined in section 921(a) (3) of Title 18, United States Code (USC) the term &amp;quot;firearm&amp;quot; means --&lt;br /&gt;
&lt;br /&gt;
    * (A) any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive;&lt;br /&gt;
    * (B) the frame or receiver of any such weapon;&lt;br /&gt;
    * (C) any firearm muffler or firearm silencer; or&lt;br /&gt;
    * (D) any destructive device. Such term does not include an antique firearm. &lt;br /&gt;
&lt;br /&gt;
As defined in 26 USC subsection 5845(f) (2) the term destructive device includes any type of weapon by whatever name known which will, or which may readily be converted to, expel a projectile by the action of an explosive or other propellent, the barrel or barrels of which have a bore of more than one-half inch in diameter, except a shotgun or shotgun shell which the Secretary or his delegate finds is generally recognized as particularly suitable for sporting purposes; and (3) any combination of parts either designed or intended for use in converting any device into a destructive device as defined in subparagraphs (1) and (2) and from which a destructive device may be readily assembled. The term &#039;destructive device&#039; shall not include any device which is neither designed nor redesigned for use as a weapon; any device, although originally designed for use as a weapon, which is redesigned for use as a signaling, pyrotechnic, line throwing, safety, or similar device; surplus ordnance sold, loaned, or given by the Secretary of the Army pursuant to the provisions of section 4684(2), 4685, or 4686 of title 10 of the USC; or any other device which the Secretary of the Treasury or his delegate finds is not likely to be used as a weapon, or is an antique or is a rifle which the owner intends to use solely for sporting purposes.&lt;br /&gt;
&lt;br /&gt;
It is unlawful for anyone to make or possess a destructive device which is not registered in accordance with the provisions of the National Firearms Act.&lt;br /&gt;
&lt;br /&gt;
We have previously examined that certain muzzle loading devices known as &amp;quot;potato guns.&amp;quot; These potato guns are constructed from PVC plastic tubing. They use hair spray or a similar aerosol substance for a propellant, and have some type of spark ignitor. We have determined that these devices, as described, are not firearms provided that they are used solely for launching potatoes for recreational purposes. However, any such devices which are used as weapons or used to launch other forms of projectiles may be firearms and destructive devices as defined.&lt;br /&gt;
&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
===Interpretation of the ATF letter===&lt;br /&gt;
&amp;quot;other forms of projectiles&amp;quot; is typicaly interpreted to mean flamable, and/or explosive projectiles; ie, that &amp;quot;potatoes&amp;quot; was an example of an acceptable projectile, and not the only option.&lt;br /&gt;
&lt;br /&gt;
===State, County, and City laws===&lt;br /&gt;
These vary. Generaly, it is illegal to shoot a spudgun inside city limmits.&lt;br /&gt;
The owner of the SGTC provides the following advice: &amp;quot;&amp;lt;i&amp;gt;If it is ok to shoot a shotgun in your particular location....you will have no problem with your spudgun.&amp;lt;/i&amp;gt;&amp;quot;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Other countries==&lt;br /&gt;
BoilingLB is under the impression that they are illegal in austrailia.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Legal_issues&amp;diff=1880</id>
		<title>Legal issues</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Legal_issues&amp;diff=1880"/>
		<updated>2005-10-27T15:51:02Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: Added image version of ATF letter.&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;==United States of America==&lt;br /&gt;
===Letter from the ATF===&lt;br /&gt;
The bureau of alchohol, tobacco, and firearms sent the [[SGTC]] the following letter.&lt;br /&gt;
Another version with picturs can be found [http://www.spudfiles.com/Other/are_they_legal.php here].&lt;br /&gt;
&lt;br /&gt;
&amp;lt;blockquote&amp;gt;&lt;br /&gt;
Department of the Treasury&lt;br /&gt;
&lt;br /&gt;
Bureau of Alcohol, Tobacco, and Firearms&lt;br /&gt;
&lt;br /&gt;
Washington, DC 20226&lt;br /&gt;
&lt;br /&gt;
As defined in section 921(a) (3) of Title 18, United States Code (USC) the term &amp;quot;firearm&amp;quot; means --&lt;br /&gt;
&lt;br /&gt;
    * (A) any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive;&lt;br /&gt;
    * (B) the frame or receiver of any such weapon;&lt;br /&gt;
    * (C) any firearm muffler or firearm silencer; or&lt;br /&gt;
    * (D) any destructive device. Such term does not include an antique firearm. &lt;br /&gt;
&lt;br /&gt;
As defined in 26 USC subsection 5845(f) (2) the term destructive device includes any type of weapon by whatever name known which will, or which may readily be converted to, expel a projectile by the action of an explosive or other propellent, the barrel or barrels of which have a bore of more than one-half inch in diameter, except a shotgun or shotgun shell which the Secretary or his delegate finds is generally recognized as particularly suitable for sporting purposes; and (3) any combination of parts either designed or intended for use in converting any device into a destructive device as defined in subparagraphs (1) and (2) and from which a destructive device may be readily assembled. The term &#039;destructive device&#039; shall not include any device which is neither designed nor redesigned for use as a weapon; any device, although originally designed for use as a weapon, which is redesigned for use as a signaling, pyrotechnic, line throwing, safety, or similar device; surplus ordnance sold, loaned, or given by the Secretary of the Army pursuant to the provisions of section 4684(2), 4685, or 4686 of title 10 of the USC; or any other device which the Secretary of the Treasury or his delegate finds is not likely to be used as a weapon, or is an antique or is a rifle which the owner intends to use solely for sporting purposes.&lt;br /&gt;
&lt;br /&gt;
It is unlawful for anyone to make or possess a destructive device which is not registered in accordance with the provisions of the National Firearms Act.&lt;br /&gt;
&lt;br /&gt;
We have previously examined that certain muzzle loading devices known as &amp;quot;potato guns.&amp;quot; These potato guns are constructed from PVC plastic tubing. They use hair spray or a similar aerosol substance for a propellant, and have some type of spark ignitor. We have determined that these devices, as described, are not firearms provided that they are used solely for launching potatoes for recreational purposes. However, any such devices which are used as weapons or used to launch other forms of projectiles may be firearms and destructive devices as defined.&lt;br /&gt;
&amp;lt;/blockquote&amp;gt;&lt;br /&gt;
&lt;br /&gt;
===Interpretation of the ATF letter===&lt;br /&gt;
&amp;quot;other forms of projectiles&amp;quot; is typicaly interpreted to mean flamable, and/or explosive projectiles; ie, that &amp;quot;potatoes&amp;quot; was an example of an acceptable projectile, and not the only option.&lt;br /&gt;
&lt;br /&gt;
===State, County, and City laws===&lt;br /&gt;
These vary. Generaly, it is illegal to shoot a spudgun inside city limmits.&lt;br /&gt;
The owner of the SGTC provides the following advice: &amp;quot;&amp;lt;i&amp;gt;If it is ok to shoot a shotgun in your particular location....you will have no problem with your spudgun.&amp;lt;/i&amp;gt;&amp;quot;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Other countries==&lt;br /&gt;
BoilingLB is under the impression that they are illegal in austrailia.&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1879</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1879"/>
		<updated>2005-10-27T15:41:36Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctelly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. All of this is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of SpudFiles&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1878</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1878"/>
		<updated>2005-10-27T15:37:35Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&#039;&#039;&#039;&lt;br /&gt;
[[What is a spudgun?]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&#039;&#039;&#039;&lt;br /&gt;
&lt;br /&gt;
This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctelly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. And all of this, is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of spudfiles&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1877</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1877"/>
		<updated>2005-10-27T15:35:43Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctelly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. And all of this, is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of spudfiles&lt;br /&gt;
&lt;br /&gt;
Note - This page (Main Page) is open for editing!&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== [[What is a spudgun?]] ==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
[[Combustion cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[Hybrid cannon]]s&lt;br /&gt;
&lt;br /&gt;
[[BB machine gun]]s&lt;br /&gt;
&lt;br /&gt;
[[Cannon construction]]&lt;br /&gt;
&lt;br /&gt;
[[Launcher configuration]]&lt;br /&gt;
&lt;br /&gt;
[[Safety]]&lt;br /&gt;
&lt;br /&gt;
[[Legal issues]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:About&amp;diff=1316</id>
		<title>SpudFiles Wiki:About</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:About&amp;diff=1316"/>
		<updated>2005-10-18T01:35:12Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This is supposed to be about the SpudFiles wiki... however if your here I hope you know why... so someone else can fill ya in :p&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1312</id>
		<title>Main Page</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=Main_Page&amp;diff=1312"/>
		<updated>2005-10-18T01:26:23Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;Do you really know what this website is about? Do you? This website is here to teach you about potato guns, also called spudguns, spudzookas, and spud chuckers. So far there are pneumatic, combustion, hybrid, and BB type cannons/launchers. Here you will learn all about spud safety, how to make things like breech loaders and what types of fuel to use in your spud gun (like propane, butane, hairspray, rightguard, etc.). You will learn the good and bad types of ammo to use as well as learn the best types of ignition (like stunguns, flint ignitors, BBQ ignitors, etc.) and how legal your cannon is. You just may learn how to get something totally free. You will learn about ABS and PVC pipe and how to correctelly mount a pressure gauge into your cannon. You will learn all about the different kinds of valves and how to use them. (sprinkler valves, diaphragm valves, pistons, etc.) You will learn how to make a hybrid and a pneumatic/combustion cannon. You can even learn about strafers and submachine BB guns! Above all you will be able to find instructions on how to build things that you will love for years to come. And all of this, is totally free so be happy and get on to registering and posting!&lt;br /&gt;
&lt;br /&gt;
-PCGUY, maker of spudfiles&lt;br /&gt;
&lt;br /&gt;
[[Cannon_Construction]]&lt;br /&gt;
&lt;br /&gt;
[[History]]&lt;br /&gt;
&lt;br /&gt;
[[Combustion_Cannons]]&lt;br /&gt;
&lt;br /&gt;
[[Pneumatic_Cannons]]&lt;br /&gt;
&lt;br /&gt;
[[Hybrid_Cannons]]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
	<entry>
		<id>https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:Site_support&amp;diff=1310</id>
		<title>SpudFiles Wiki:Site support</title>
		<link rel="alternate" type="text/html" href="https://spudfiles.com/spud_wiki/index.php?title=SpudFiles_Wiki:Site_support&amp;diff=1310"/>
		<updated>2005-10-18T01:25:48Z</updated>

		<summary type="html">&lt;p&gt;PCGUY: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[http://www.spudfiles.com/donate.php Donate]&lt;/div&gt;</summary>
		<author><name>PCGUY</name></author>
	</entry>
</feed>