Pneumatic Cannons

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SpudFiles Potato Gun Commercial

Last post by quinn whitsitt
Posted in Combustion Cannons
Replies: 15
by PCGUY » Tue Oct 29, 2013 10:54 pm » in Combustion Cannons
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I've been wanting to get in some spud shooting action this fall before the weather got cold. I know it's been a while since I filmed anything for...

Last post

thank you for creating this website is there anything i can do to help
15 Replies

1125302 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Directional Control Valves (3way valves and stuff like that)

Last post by jpalf1
Replies: 86
by POLAND_SPUD » Sun Mar 07, 2010 1:12 am
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Directional Control Valves, commonly refereed to as 3,4,5 etc. valves or spool/poppet valves etc., can be very useful for spuders.
They can be used...

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very,useful info for a beginner such as myself.The links are great as well.Thankyou.(you won't believe this but as i was reading,my fridge comp...
86 Replies

552428 Views

Last post by jpalf1
Sat Apr 13, 2013 10:53 am
Sprinkler Valve Troubleshooting Guide

Last post by quinn whitsitt
Replies: 64
by noname » Sat Jun 16, 2007 12:15 am
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Sprinkler Valve Troubleshooting

This is a guide to sprinkler valve problems. Before creating a new topic to ask questions on why your valve isn't...

Last post

great job everyone
64 Replies

821326 Views

Last post by quinn whitsitt
Thu Feb 22, 2024 2:18 pm
Piston Valves Explained Visually

Last post by pavina
Replies: 178
by clide » Mon May 14, 2007 11:21 pm
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I had this posted on Spudtech, but I am reposting it here to hopefully help some people out and allow for discussions/updates.

Well I made this...

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Thanks for sharing this! It might also be useful to mention how friction and maintenance can affect performance over time. Looking forward to more...
178 Replies

967223 Views

Last post by pavina
Fri Sep 27, 2024 4:05 am
"How Much CO2 do I need?"

Last post by choke
Replies: 32
by BC Pneumatics » Sun Apr 01, 2007 9:52 pm
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For all those people out there looking for a rough idea of how much CO2 they will need for a chamber of any given size-
Just multiply the volume of...

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Great piece of software :) I've been kicking numbers round my head for a while now, and wondered if someone here could confirm. I'm filling a 1.5 dia...
32 Replies

374979 Views

Last post by choke
Thu Jul 04, 2013 2:38 pm
Valve Cutaways

Last post by jhalek90
Replies: 8
by PCGUY » Sat Feb 26, 2005 9:10 pm

First post

VALVE CUTAWAY

Provided By - Longshot

These are some pictures of some of the most popular valves used on spud cannons. Only difference is, these...

Last post

Can someone fix the picture links??

8 Replies

92435 Views

Last post by jhalek90
Wed Oct 07, 2009 2:13 pm

Topics

first gun-onto the building

Last post by bradisfun
Replies: 4
by bradisfun » Thu Dec 03, 2009 1:52 am

First post

ok well tomorrow( or some time on the weekend ) i will be going to get by parts, so i will tell u a little about the gun i want to build, this will...

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yeah thanks that was the sort of thing that i was thinking of and that is another reson of the backpack so when i go to bunings to night i will look...

4 Replies

1853 Views

Last post by bradisfun
Thu Dec 03, 2009 3:36 am
Coaxial airsoft rifle design question

Last post by ohspyro89
Replies: 7
by achs_xc » Sat Nov 28, 2009 5:33 pm

First post

I want to make an airsoft rifle. I also want to use a coaxial design. I know the barrel needs to be a brake line, but does anyone have a suggestion...

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One thing you'd lack, which is very important would be a hop up. Since the start of the barrel is inside the air chamber, there would be no way to...

7 Replies

3122 Views

Last post by ohspyro89
Thu Dec 03, 2009 1:49 am
Coaxial Piston cannon [VIDEO]

Last post by jackssmirkingrevenge
Replies: 25
by Joelduf » Mon Nov 23, 2009 4:30 pm
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UPDATE
I will be using a pulley system to charge and fire the cannon from now on due to the fact that i am using DWV Tees and elbows, so there is no...

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Too bad i ran out of particle board to shoot, as far as i know. :wink:

That's the problem with a new launcher, things around the house previously...
25 Replies

13310 Views

Last post by jackssmirkingrevenge
Wed Dec 02, 2009 2:47 pm
The Javelin

Last post by Willdebeers
Replies: 11
by Willdebeers » Sun Nov 29, 2009 7:31 am

First post

This is a quick, side project to my (undisclosed) main project. It utilises the extremely powerful sprinkler valve, mine was a irritrol 1 one. I...

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The scope is very handy. The grip is fine, infact it is more confortable for me there.

11 Replies

5429 Views

Last post by Willdebeers
Wed Dec 02, 2009 11:53 am
Piston Material

Last post by CasinoVanart
Replies: 15
by daniel323 » Fri Nov 27, 2009 3:53 pm
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I know this is a frequently asked question, but i cant find a good piston for my gun. I am making a copper piston gun and the Chamber is ( 1 )...

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Yes the shorter the better unless you are trying to get rid of dead space, which i might add should have been eliminated at the design stage.
15 Replies

7791 Views

Last post by CasinoVanart
Wed Dec 02, 2009 4:02 am
Tripple Barrel launcher

Last post by jackssmirkingrevenge
Replies: 11
by n2extreme1 » Mon Nov 30, 2009 1:50 pm

First post

Hello everyone. This is my 1st post. I have been trolling for a bit and trying to get a better understanding on launchers. I plan on making a 3...

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Will a longer barrel or larger chamber help with the desired range and still keep it under 250 fps?

Range is directly related to velocity. If...

11 Replies

3360 Views

Last post by jackssmirkingrevenge
Wed Dec 02, 2009 1:14 am
Ball Valves

Last post by Ragnarok
Replies: 6
by Spooky » Mon Nov 30, 2009 4:40 pm

First post

Hi guys, after seeing all of the wonderful large bore sawed off style pneumatics about recently I thought I'd give one a go myself.

Looking at a...

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You wouldn't be able to solder that, but compression is VERY trustworthy.
Agreed - compression fittings, if done to spec, are solid pieces of kit....

6 Replies

3225 Views

Last post by Ragnarok
Tue Dec 01, 2009 7:42 pm
Check Valve interrupter confusion

Last post by POLAND_SPUD
Replies: 9
by Solar » Thu Nov 19, 2009 5:11 am

First post

If I wanted to hold back a supply of air until the source reached a set psi (say 100) I could use a simple safety relief type setup, and vent the air...

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I am just curious... have you found the part you need ??

I've just got a delay valve (I want to build an oscillating circuit with it) and I think...

9 Replies

2127 Views

Last post by POLAND_SPUD
Mon Nov 30, 2009 7:02 pm
MGL Stock

Last post by spudtyrrant
Replies: 24
by Procyon » Thu Nov 05, 2009 3:11 pm
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I'm working on a 7 shot semi-auto revolver type 40mm grenade launcher. I've got the body and main air complete but still need to start work on the...

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damn i would usually make a comment about pilot volume but this is so beautiful i can't bring myself to do it. :D
kudos nice job!!!
24 Replies

18884 Views

Last post by spudtyrrant
Sun Nov 29, 2009 4:50 pm
Sorta Semi Airsoft Gun EDIT 9/6

Last post by ramses
Replies: 13
by noname » Sat Sep 05, 2009 9:11 pm

First post

Alright, here's the first gun I've made in quite a long while. It's given me lots of trouble and is probably the most work I've put into any size of...

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nice. If you acquired a 3 way push button valve, it would be a true semi auto, and it would be much more ergonomic.

here

13 Replies

4829 Views

Last post by ramses
Sun Nov 29, 2009 11:23 am
Valve Search

Last post by Procyon
Replies: 6
by PVC Arsenal 17 » Fri Nov 27, 2009 6:33 pm

First post

I'm looking for a large-ish valve to toss a ~1 lb. 2 diameter paint grenade a reasonable distance.

Some of the requirements for this valve are:...

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I have an Asco 12 volt valve available that could be converted to pneumatic control. If I recall without looking its 1 1/4 maybe 1 at the smallest....

6 Replies

3183 Views

Last post by Procyon
Sun Nov 29, 2009 10:02 am
Which valve has better flow? and a question or 2 about UHMW

Last post by SpudBlaster15
Replies: 21
by ramses » Fri Nov 13, 2009 11:00 pm
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I have seen two types of barrel sealing T piston valves, and I was wondering which would have better flow, all other things constant.

There is the...

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21 Replies

8110 Views

Last post by SpudBlaster15
Sat Nov 28, 2009 1:14 am
Any Golf Ball Clips Out There? Edit Piston help too i guess

Last post by inonickname
Replies: 8
by Northir » Fri Nov 27, 2009 2:22 pm

First post

Ive been working on my next golf ball cannon, ans was trying to add in a clip of some kind, i was thinking of a ball valve drilled out, or a t ball...

Last post

You want a magazine, not a clip. A clip is a loading aid.

I'd use a tee with a bolt and a pneumatic cylinder to actuate it. The barrel/magazine can...

8 Replies

5601 Views

Last post by inonickname
Fri Nov 27, 2009 11:39 pm
Piston Problems

Last post by achs_xc
Replies: 3
by achs_xc » Fri Nov 27, 2009 7:01 pm

First post

I am using a 3/4 metal tee and a 3/4 nipple to house my piston. I can get the piston to seal the hose barb, but once I add the air tank to...

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Very little gap around the piston

Do you mean the circumference around the piston or the distance between the end of the piston and the spring?...

3 Replies

1678 Views

Last post by achs_xc
Fri Nov 27, 2009 9:09 pm
Perfect Nail Dart Shot: 730 fps @ 100 psi

Last post by boyntonstu
Replies: 4
by boyntonstu » Sun Nov 22, 2009 1:07 pm

First post

They all don't shoot as fast.

This dart must have had a perfect seal.

Encouraging if it is real!

Last post

A few more shots today at 200 psi.

Nail dart is a 3 10d nails + tail weighs 109 grains

725 fps (127.5 ft-lb), 526fps , 625 fps.

It's the tail that...

4 Replies

1594 Views

Last post by boyntonstu
Fri Nov 27, 2009 12:29 pm
Is opening a ball valve in 30 milliseconds fast enough?

Last post by boyntonstu
Replies: 9
by boyntonstu » Wed Nov 25, 2009 9:15 am

First post

A buddy of mine (Theairgunman) likes the simplicity and the trigger feel of using a ball valve.

Using a 30 frame/sec video camera, he told me that...

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Well, firstly, I'm seeing some lack of knowledge about GGDT - clearly, the FAQ/Guide has not been read.
An input of 99.61% into GGDT's valve...

9 Replies

6905 Views

Last post by boyntonstu
Fri Nov 27, 2009 10:23 am
Anyone Know About SGTC orders?

Last post by starman
Replies: 6
by racingjoe27 » Tue Nov 24, 2009 4:37 pm

First post

Hey guys, I've been reading on here for awhile now but finally decided to join. I have a 2 combustion, and 3 pneumatic cannons built now.

On to my...

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For some time now (several years), their only really unique product has been their high quality rifled barrels. Everything else is pretty...

6 Replies

1894 Views

Last post by starman
Thu Nov 26, 2009 2:30 am
QEV help

Last post by CpTn_lAw
Replies: 21
by Major Collins » Mon Nov 23, 2009 9:07 am
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ok dear friends of spud files who want to help me obtain a qev ? lolol umm i cannot get hold of one (in Australia) its pretty gay i was wondering if...

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Thanks, well, they do not sell QEV's. Guess i'll have to buy from the U.K. ....
21 Replies

6001 Views

Last post by CpTn_lAw
Wed Nov 25, 2009 5:25 pm
is CO2 worth it

Last post by bradisfun
Replies: 17
by bradisfun » Tue Nov 24, 2009 4:51 pm
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hi guys (and girls) i as wondering if it would be worth investing in a co2 system since my compressor will only go to 120psi
i haven't built my gun...

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ok thanks guys i think i will go with some sort of propane tank
i was just wondering if any tanks (like a long skinny camping stile) would have a...
17 Replies

4260 Views

Last post by bradisfun
Wed Nov 25, 2009 4:27 pm
Spudguns in space

Last post by jackssmirkingrevenge
Replies: 45
by Demon » Sat Nov 21, 2009 9:58 am
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Just for fun ;

What would happen if we would be firing a steel QEV airgun in a no-pressure environment( such as a vacuum chamber or in space ) ?
The...

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It must be said though that the M16 (and it derivatives) has had it's detractors since it was first used in Vietnam more than 40 years ago.

Very...
45 Replies

12803 Views

Last post by jackssmirkingrevenge
Tue Nov 24, 2009 5:05 pm
12g co2 psi?

Last post by Marffy
Replies: 4
by Marffy » Mon Nov 23, 2009 11:18 pm

First post

I've searched everywhere for finding out how much psi is in a 12g co2 cartridge but i cant seem to find out how much psi. How much psi is in one?...

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I say this so you know i'm in the right part of the forum
Normally, it doesn't need qualifying.

just making sure
:)

4 Replies

5807 Views

Last post by Marffy
Tue Nov 24, 2009 9:30 am
Semi Auto and Regulators Help

Last post by Major Collins
Replies: 5
by Major Collins » Mon Nov 23, 2009 6:43 am

First post

ok for a double chamber / ball valve semi auto idea , if i have a primary chamber that can be filled to 400 psi how big does the secondary chamber...

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O.o oh really now? .... that sounds harder than what i wanted to do lol
well diameter i dont know and since i dont know how to find it out i will be...

5 Replies

1210 Views

Last post by Major Collins
Mon Nov 23, 2009 10:17 pm
cutting and welding of old propane tanks

Last post by Technician1002
Replies: 14
by MrDEB » Sat Nov 21, 2009 8:42 am

First post

I found two large (about 4ft tall) propane tanks that are for FREE
Question concerns safety in cutting and welding of tanks.
I understand that...

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leaving out in weather upside down(valve end down) for say a month. Seeing how propane is heavier than air?
Leaving it upside down won't do...

14 Replies

6453 Views

Last post by Technician1002
Mon Nov 23, 2009 7:25 pm
how do you make a piston valve?

Last post by covey12
Replies: 18
by THEMOST » Sun Nov 05, 2006 6:06 pm
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how do you do it ? i cant understand any of the diagrams they briefly explain. But what I mostly dont understand is how you open the valve. Could...

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it opens because there is air pressure on both sides of the piston, the front of the piston that is against the barrel sealing it, and behind the...
18 Replies

6131 Views

Last post by covey12
Sun Nov 22, 2009 6:46 pm
my air rifle design

Last post by TwitchTheAussie
Replies: 1
by hybridpyrotech » Sun Nov 22, 2009 8:19 am

First post

The way this design came to me was, some people play with pneumatic spud guns/cannons, and they're very powerful so i thought of making the air...

Last post

Are those adapters made from DWV? If they are thats not safe mate. Its not pressure rated.

1 Replies

2436 Views

Last post by TwitchTheAussie
Sun Nov 22, 2009 6:16 pm

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