SpudFiles Wiki - User contributions [en]

Golf ball

2009-11-08T01:11:39Z

Pimpmann22: /* Barrels */

[[Image:Golf_ball.jpg|200px|right|]]'''Golf balls''' are commonly used as [[ammo]] in spudguns for a few reasons

*Uniform in shape and size
*Aerodynamic
*Availability

==Barrels==

Golf balls fit in 1.5" SDR 21 (id 1.7") [[PVC pipe]], but because of its thin walls, it may be sleeved inside 2" SCH 80 PVC pipe.

Another barrel is Sch 10 1.5" (id 1.682") metal pipe.

As golf balls are spherical, the construction of a hop-up device is common. These consist of a high-friction object on the top of the [[barrel]] which catches and puts a back spin on the ball. This backspin generates lift via the magnus effect, greatly extending the range of a golf ball. Also, it improves [[spudgun accuracy|accuracy]], because instead of a spin in a random direction pushing the golf ball off course, you have a consistent back spin.

==Modifications==

Mantle removal: By removing the outer covering (mantle) of the golf ball, you reduce the diameter which allows you to put it in 1.5" sch 40 pipe. This is best done with a chisel or such tool. However, this removes the dimples; they increase the magnus effect (responsible for lift) and decrease the drag. This means that the ball won't go as far.

"fin" insertion: By drilling a hole and inserting a nail/golf tee/stick, you prevent the golf ball from spinning. This improves accuracy by protecting the golf ball from the magnus effect.

==specifications==
* Diameter: 1.68 inches
* Mass: 46g

{{stub}}
[[Category:projectiles]]

Golf ball

2009-11-08T01:07:17Z

Pimpmann22: /* Barrels */

[[Image:Golf_ball.jpg|200px|right|]]'''Golf balls''' are commonly used as [[ammo]] in spudguns for a few reasons

*Uniform in shape and size
*Aerodynamic
*Availability

==Barrels==

Golf balls fit perfectly in 1.5" SDR 21 (id 1.7") [[PVC pipe]], but because of its thin walls, it may be sleeved inside 2" SCH 80 PVC pipe.

Another barrel is Sch 10 1.5" (id 1.682") aluminum or stainless steel pipe.

Also fairly common is the construction of a hop-up device. These consist of a high-friction object on the top of the [[barrel]] which catches and puts a back spin on the ball. This backspin generates lift via the magnus effect, greatly extending the range of a golf ball. Also, it improves [[spudgun accuracy|accuracy]], because instead of a spin in a random direction pushing the golf ball off course, you have a consistent back spin.

==Modifications==

Mantle removal: By removing the outer covering (mantle) of the golf ball, you reduce the diameter which allows you to put it in 1.5" sch 40 pipe. This is best done with a chisel or such tool. However, this removes the dimples; they increase the magnus effect (responsible for lift) and decrease the drag. This means that the ball won't go as far.

"fin" insertion: By drilling a hole and inserting a nail/golf tee/stick, you prevent the golf ball from spinning. This improves accuracy by protecting the golf ball from the magnus effect.

==specifications==
* Diameter: 1.68 inches
* Mass: 46g

{{stub}}
[[Category:projectiles]]

Barrel

2009-11-08T01:05:00Z

Pimpmann22:

The '''barrel''' is the pipe used to launch the projectile, and is, along with the [[chamber]], the only component found in all launchers. The diameter determines what projectiles will fit in the launcher, and the length affects how much energy is transferred to the projectile.

Modifications and improvements to the basic barrel include [[sleeving]], [[rifled barrel|rifling]], [[hop-up]]s and flatline barrels.

There are many diameters of barrels popular in spudding, below are some that fit certain [[ammo]]:

* 4.5mm brakeline - fits bbs, good for [[BBMGs]]
* 6mm brakeline - fits [[airsoft bb]]s, a commonly used ammo in BBMGs.
* 3/4" CPVC, 3/4" sch 80 PVC (looser fit), or 3/4" SCH 120 PVC - fits .68" [[paintball]]s
* 1/2" SCH 40 PVC (.602" id) - fits "AA" batteries, marbles.
* 1/2" SDR 21 PVC (.685" id) - fits .68 caliber paintballs.
* 3/4" SCH 40 PVC (.804" id) - fits 12g [[CO2 cartridge]]s, C batteries.
* 1" SCH 40 PVC (1.029" id) - size [[C cell|"C" batteries]], smaller sized [[bouncy balls]].
* 1.25" SCH 40 PVC (1.360" id) - fits size [[D cell|"D" batteries]], [[film canister]]s
* 1.5" SCH 10 Metal (1.682" id) - fits [[golf ball]]s, but with tighter tolerances than the 1.5" SDR barrels.
* 1.5" SCH 40 PVC (1.590" id) - a common size, good trade-off between power and [[potato]] usage. [http://www.spudtech.com/components.asp Available rifled from the [[SGTC]]]
* 1.5" SDR 21 PVC (1.700" id) - fits golf balls. Traditionally sleeved within SCH-80 PVC.
* 1.5" SDR 26 PVC (1.734" id)- fits golf balls, but it is thinner than SDR 21, so the golf balls fit a little looser. Traditionally sleeved within 2" SCH-80 PVC.
* 2" SCH 40 PVC (2.047" id) - fits caulk tubes and (large) potatoes.
* 2" SCH 80 PVC (1.913" id) - fits 1.5" nominal pipe well, making it ideal for sleeving Also used as a golf ball barrel by itself, with the golf ball held in place by a rag patch, or other wadding. Also fits normal light bulbs! [http://advancedspuds.com/concreteballs.htm (Details)].
* 2.5" SDR 26 PVC (2.635" id) - fits [[beverage can]]s extremely well
* 2.5" SCH 40 PVC (2.445" id) - fits [[tennis ball]]s well.
* 3" SCH 80 PVC (2.864" id) - fits many drink bottles well.
* 3" SCH 40 PVC (3.042" id) - fits normal [[steel can|cans]], empty propane torch tanks, certain wine bottles, and Gatorade bottles.
* 4" SCH 80 steel (3.826" id) - fits softballs PERFECTLY. Kind of heavy though, at over 15 pounds/foot.
* 4" SCH 40 PVC (3.998" id) - fits 29 oz. cans

*Inside diameter (id) data from www.harvel.com
*Additional (id) data from [http://en.wikipedia.org/wiki/Nominal_Pipe_Size Nominal Pipe Size (NPS)] Wikipedia article.
[[Category:Components]]

Talk:Combustion cannon

2008-06-26T23:06:34Z

Pimpmann22:

''26 June 2008''

"A basic combustion cannon is the simplest one to build"

Now that is a bold statement. Combustion and pneumatic launchers in there simplest form are comparably easy to make. So is this statement even necessary? If the statement is necessary at least include the premises upon which you made that conclusion. Perhaps it has fewer critical components, or it is cheaper, or whatever. Alone it is extremely opinionated.

"Krylon Fusion, a type of paint specifically made for plastics, is the most common type of spray paint used on potato cannons."

While I don't think we need to go about and cite our sources, but I want to know how it is verifiable to say Krylon Fusion is the staple paint brand when it comes to painting potato cannons. Maybe mention that the Krylon is a major manufacture of paint, and that there Fusion line is specifically made for PVC among other plastics.

"When using a normal fuel, pressure rated pipe and fittings and have properly solvent welded all of the joints, you can be considered 100% safe."

Who the f*ck said that?

Why don't I just go in and edit everything myself? I intend to, but first I must understand what we are going for here. Seems a lot of people are wingin' it with some opinionated bull.

''Unknown Date''

Hey, where's that trouble shooting guide?

''9 March 2008''

I've removed Bigbob's edit:
''"bigbob edit, above it says they are the simplest to build this is not true. Pnuematics are much easier to build and oprerate."''

Since the preceeding sentence, and the page itself, is concerned with combustion guns the reference to pneumatics is not relevant. A basic combustion is indeed the simplest '''combustion gun''' to build.

A paragraph saying that a pneumatic may be a easier to build than a combustion may be appropriate, but that I believe the statment is debatable.

Talk:Golf ball

2007-09-12T09:20:02Z

Pimpmann22:

Two things I would like to bring notice to. The statement that golf balls fit "perfectly" in SDR21 (Class 200) piping. Also to note that "Class 200" is a alternative, yet same classification as SDR-21, and more common in the "industry". I would have done the editing myself, but yal seem to be better when it comes to wording, and organization. So if you don't mind I will just kick the ideas around. --Pimpmann22 09.12.07

Talk:Golf ball

2007-09-12T09:18:19Z

Pimpmann22: New page: Two things I would like to bring notice to. The statement that golf balls fit "perfectly" in SDR21 (Class 200) piping. Also to note that "Class 200" is a alternative, yet same classifica...

Rules/ Suggestions

2007-04-20T19:36:23Z

Pimpmann22: New page: == Conduct Q&A == '''Q:''' What should I do if I see a rule violation, or something I think needs the attention of the moderation staff? '''A:''' ''Please contact a moderator via the PM ...

== Conduct Q&A ==

'''Q:''' What should I do if I see a rule violation, or something I think needs the attention of the moderation staff?

'''A:''' ''Please contact a moderator via the PM service of the issue. Please do not respond in the thread itself, as it often spurs conflict, and diverts from the original subject matter of the thread. While the moderation staff tries to and read every post made on SpudFiles, that often does not happen. Also as once the moderation has fixed the conflict, your post will be of no significant nature. This will have to be deleted, creating more moderation then necessary.''

'''Q:''' A member personally insulted me, what should I do?

'''A:''' ''Do not respond, rather PM a member of the moderation staff. If such is of a mild nature contacting the member privately via the PM service may be a option to consider.''

How-To

2007-04-02T04:30:53Z

Pimpmann22:

==Posting a image:==
First it must be determined if the image is already hosted on the internet, or if it is on your computer hard drive.

'''Image is hosted:'''

First right-click the desired image, then select 'Copy image location'. If not available, select 'Properties'. Listed will be the 'location', highlight, and [[copy]] the location. The location must then be put in tags. Either of the following will work:
* [img]''<nowiki>http://www.spudfiles.com/forums/templates/DAJ_Glass/images/logo.gif</nowiki>''[/img]
* <img src="''<nowiki>http://www.spudfiles.com/forums/templates/DAJ_Glass/images/logo.gif</nowiki>''">
[The location - ''<nowiki>http://www.spudfiles.com/forums/templates/DAJ_Glass/images/logo.gif</nowiki>'' - was used as a example.]

'''Image on hard drive:'''

If you are writing a reply, first select the 'Add Reply' button. Once you have added your remarks, scroll down to 'add an attachment'. Under 'Filename' select browse, and find the image on your computer. At this time if your so choose add a description for the image, then select 'Add Attachment'. This may be done multiple times before 'Submitting'.

Forum Code

2007-04-02T04:24:25Z

Pimpmann22:

SpudFiles accepts both basic BBCode, and HTML. These markup languages can be used in your posts, and responses.

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| [http://wikipedia.org Wikipedia]
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150px-Wikipedia-logo.png[/img]</nowiki></code>
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commons/thumb/6/63/Wikipedia-logo.png/
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<code><nowiki>[color=#FF0000]Red Text[/color]</nowiki></code> (Can use many different color names or hex codes.)
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(And usually other [[emoticon]]s)
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(Specific image and size vary)
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SpudFiles forum guidelines

2007-04-02T04:18:00Z

Pimpmann22:

The following is documentation pertaining to the [http://www.spudfiles.com/ SpudFiles] forum.

[[How-To]]

[[Rules/ Suggestions]]

[[Forum Code]]

How-To

2007-04-02T04:09:11Z

Pimpmann22:

How-To

2007-04-02T01:42:54Z

Pimpmann22:

Copy

2007-04-02T01:01:48Z

Pimpmann22:

Right-click> select 'copy'

-OR-

Keyboard function: Ctrl+C

SpudFiles forum guidelines

2007-04-02T00:50:10Z

Pimpmann22:

The following is documentation pertaining to the [http://www.spudfiles.com/ SpudFiles] forum.

[[How-To]]

[[Rules/ Suggestions]]

Main Page

2007-04-02T00:46:17Z

Pimpmann22: /* The Spudding Handbook */

[[Image:Cannon.jpg|frame|An Advanced Combustion Cannon]]

=== The Spudding Handbook ===
Provided By The Users of [http://www.spudfiles.com SpudFiles]
----

[[What is a spudgun?]]

[[Combustion cannon]]s

[[Pneumatic cannon]]s

[[Hybrid cannon]]s

[[BB machine gun]]s

[[Cannon construction]]

[[Launcher configuration]]

[[Computer Applications]]

[[IPLA]]

[[Safety]]

[[Legal issues]]

[[History]]

[[SpudFiles forum guidelines]]

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!

-PCGUY (Kyle), maker of SpudFiles

==External links==

*[http://www.bcvids.com BCVids (aka Utopia), video tutorials (in part by PCGUY)]
*[http://www.bavetta.com/aircannon.html Air Cannon Barrel Length Numerical Analysis]
*[http://www.thehalls-in-bfe.com/GGDT Gas Gun Design Tool, simulation program for pneumatic guns]
*[http://www.spudfiles.com/Other/are_they_legal.php ATF Correspondence concerning spud guns]
*[http://www.spudfiles.com Spud Files (aka The Spud Cannon Database)]
*[http://www.spudtech.com Great source of spudgun information]
*[http://www.uksgc.co.uk/forums/ UK Spudgun Community The place for UK Spudgunning]

Mauler Valve

2007-04-01T23:20:58Z

Pimpmann22:

The Mauler valve, is a consumer available barrel sealing valve for the use in pneumatic launchers. This valve has been designed by Sean Gort, and is offered for sale at [http://www.launchpotatoes.com/ Launch Potatoes].

A single, independent testing found that the Mauler valve yields superior muzzle velocity, to that of the [[Supah-Valve]]. (The Supah-Valve having a reputation of being built professionally, and also yielding results of such a degree.) The tests were conducted by John Shell, who also manages a purely informatory site, [http://neospud.com/ NeoSpud]. A [[shooting chronograph]] was used to return muzzle velocity data.

The Mauler valve is unique in that it utilizes modified PVC pipe, and fittings. In contrast the [[Supah-Valve]] has machined PVC bar stock for the internal components. Both valves use a lathe to modify the components found in the valve. The Mauler using a wood [[lathe]], and the [[Supah-Valve]] using a metal [[lathe]]. The difference between the wood, and metal lathe is how the tooling is controlled. On a metal lathe, the tooling is fixed in a mechanism, then moved along linear axises. With a wood lathe the tooling is held in the operators hands, steadied by a tool rest.

It is disputed that the name is not that of the creator, Sean Gort. As formally a hand held hybrid launcher was also named the Mauler. [http://www.spudfiles.com/forums/profile.php?mode=viewprofile&u=121& Spudinator], a long time member of the spudding community, created the [http://www.spudfiles.com/forums/viewtopic.php?t=235& Mauler].

''Photograph here''

'''Specifications:'''
* 2" Female NPT Porting
* Encased in 2.5" PVC tee

==Variants:==
[http://www.launchpotatoes.com/ Launch Potatoes] also offers other valves of varying sizes. For every size variation the valve is given a different name.

'''NPT Porting:'''
* 1.5" - Shredder
* 1.25" - Ripper
* 1" - Stinger

[[category:valves]]

Mauler Valve

2007-04-01T22:23:47Z

Pimpmann22:

Chamber

2007-01-27T03:54:12Z

Pimpmann22: Fixed spelling errors

The '''chamber''' or '''reservoir''' is the power source of a spudgun. It is, along with the [[barrel]], the only component found in all launchers.

In [[combustion cannon]]s, the chamber contains the flammable fuel/air mixture, often butane or propane from an aerosol can of deodorant or from direct injection of the gas from a cylinder. If injected from a propane cylinder it is usually connected to a meter with regulates exactly 4.02% fuel into the chamber (the perfect amount).

In a [[pneumatic cannon]] the chamber contains compressed gas, usually air or CO2, however if the sound barrier wishes to be reached then a lighter gas must be chosen, often helium or hydrogen (hydrogen is not advisable as it is extremely flammable). The chamber is connected to the barrel either directly or through a valve, to propel the projectile when the energy is released.

The chamber is often the part of the launcher that is subjected to the highest stress, and it's important that it is well [[Cannon construction|constructed]] and offers a high enough pressure rating. It is also the part where the most accessories are connected, especially combustion launchers; they can have a multiple holes to accommodate [[spark gap]]s, [[chamber fan]]s, [[fuel meter]]s and for [[venting]].

[[Category:Components]]

Bushing

2006-04-09T05:32:39Z

Pimpmann22:

Used for connecting two pipes of different sizes. This is different then a reducer in the respects that a reducer connects two male peices, meanwhile a bushing connects both a female and male pipe. The larger side is for inserting into female connections and the smaller side connects to male connections.

Often used to connected the barrel to the chamber and doesnt angle on the outside rather the inside. Most commonly the bushing is inserted into a coupling, but will connect to any female connection that is both the same size and connection type (Slip or Thread).