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...

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

620504 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

343813 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

292298 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

537140 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

281440 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

66467 Views

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

Topics

Barrel Help

Last post by farcticox1
Replies: 2
by brandon2513 » Tue Aug 13, 2019 11:57 pm

First post

Hi, i just ordered these 40mm foam airsoft ball things And i was wondering what barrel i should use for these, Thanks.

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Like this

2 Replies

3110 Views

Last post by farcticox1
Wed Aug 14, 2019 6:51 pm
Acetylene

Last post by Moonbogg
Replies: 25
by Herwer » Sun Jun 16, 2019 3:09 pm
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Hello, I was thinking about acetylene as the propellant for qev airgun. Will it be safe to shoot with this? I have some carbide so I can produce...

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If you know of a way to control spin or eliminate it (thin sabot or cloth maybe?) let me know.

Take a #10 or thereabouts wood screw maybe 1.5...
25 Replies

22490 Views

Last post by Moonbogg
Sat Jun 22, 2019 10:35 pm
paintball gun dimensions (Tippmann SL-68 II)

Last post by jackssmirkingrevenge
Replies: 1
by markdem » Sat Jun 08, 2019 7:18 am

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I have taken measurements of a Tippmann SL-68 II paintball gun internals, mostly for my own record keeping but others may want to take advantage of...

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Thanks for sharing!

1 Replies

3080 Views

Last post by jackssmirkingrevenge
Wed Jun 12, 2019 5:42 am
Timed Valve vs Dump Valve for more power and efficiency

Last post by jackssmirkingrevenge
Replies: 8
by jackssmirkingrevenge » Thu Feb 21, 2019 10:01 am

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Most of the pneumatic projects on this forum use dump valves that essentially empty the chamber for every shot. Semi-automatics based on quick...

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I like holes! :D

The very definition of masculinity! Admiring holes and finding new and interesting ways to make them :D

8 Replies

15978 Views

Last post by jackssmirkingrevenge
Sun Jun 02, 2019 5:57 am
Possible way to increase pneumatic cannon power?

Last post by jackssmirkingrevenge
Replies: 6
by Doctore » Mon May 20, 2019 9:36 pm

First post

Hello everyone!

Recently I was thinking about this idea to increase your pneumatic cannon power if you are limited by pump source. I have no idea if...

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So the plan is to basically heat the chamber until the burst disk fails?

Sounds like fun :D make sure that the chamber material doesn't lose too...

6 Replies

5651 Views

Last post by jackssmirkingrevenge
Wed May 22, 2019 6:07 am
Powerful homemade pneumatic gun

Last post by wyz2285
Replies: 10
by keks2033 » Sat Apr 27, 2019 6:16 am

First post

My friend has long been interested in medium and high pressure pneumatics. Just like me, she does it with the help of plumbing and simple tools. For...

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That looks like it could be a very dangerous toy at higher pressure... still, looks well made!
They'd be playing Fortnite too :lol:

10 Replies

9710 Views

Last post by wyz2285
Mon May 20, 2019 4:54 am
Triple Take - Homemade Pneumatic Dart Gun

Last post by Doctore

by Doctore » Fri May 17, 2019 5:25 pm

Hello everyone.

A few days ago I built a simple ball valve airgun to test some darts I made. The reservoir is 0,5l coke bottle and maximum operating...

0 Replies

50345 Views

Last post by Doctore
Fri May 17, 2019 5:25 pm
Homemade QEV?

Last post by Surfer_wlan
Replies: 9
by Haniball1337 » Thu May 02, 2019 1:24 pm

First post

Hi guys , i need yours help again yee. I wanted to build qev valve beacuse they are expensive in my country :( But it leaks and dont work

Last post

Try softer rubber on the seal face.They sell this white kinda foamy sealing. Then maybe a slightly more powerfull spring that pushes the piston. And...

9 Replies

7126 Views

Last post by Surfer_wlan
Tue May 14, 2019 8:40 am
“Everything Launcher” Air Cannon

Last post by jacoblesann
Replies: 6
by jacoblesann » Tue May 07, 2019 11:46 pm

First post

Homemade Air Cannon- “Everything Launcher”

This is my homemade air cannon, made to shoot anything that will fit inside the barrels. It has a 5lb...

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I’ll keep that link in mind.

Huh, I suppose that’s true too. My plan right now is to make my own pump for my upcoming birthday so we can have some...

6 Replies

8665 Views

Last post by jacoblesann
Sat May 11, 2019 12:46 pm
Pneumatic Pistons?

Last post by jacoblesann
Replies: 6
by jacoblesann » Tue May 07, 2019 11:55 pm

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I’ve researched a lot of compressed air spearguns and have noticed that they’re way different than I thought. Instead of a simple air tank and barrel...

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That’s perfect, thank you so much. I was trying to design my own and was close to that first image but not quiet. This helps tremendously.

I think...

6 Replies

4436 Views

Last post by jacoblesann
Sat May 11, 2019 12:41 pm
.68 call pistol bike pump powered

Last post by Mike Vity
Replies: 3
by Surfer_wlan » Sun Apr 28, 2019 5:27 am

First post

So I wanted something small to shoot paintball size projectiles and to be manualy powered. I used T piece brass piston valve (common design),...

Last post

Hey, can you send more photos please?

3 Replies

4392 Views

Last post by Mike Vity
Wed May 08, 2019 5:19 am
" Old Shatterhand" 5 shot mag now cycling on vid.

Last post by Moonbogg
Replies: 234
by Brian the brain » Wed Apr 01, 2009 12:31 pm
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Well...here's a proof of concept gun from your friendly forum BTB...

I had to do something to show Psy is not the only Dutchman on top... :D

A QEV...

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Was just revisiting this thread. I love this beautiful, massive gun. It just looks beefy as hell and looks so good. I'm heart broken there isn't any...
234 Replies

123703 Views

Last post by Moonbogg
Sat May 04, 2019 10:36 pm
40mm launcher

Last post by farcticox1
Replies: 19
by farcticox1 » Mon Mar 04, 2019 6:44 pm
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Starting a post for my 40mm lancher, planned ammo is foam balls (practice golf balls) Got a few parts assembled, waiting for a 1/2 QEV off Ebay....

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Fired the bouncy ball at 150psi, kept it pointing low as I didn't know how far it would go. With some bouncing it covered 70m, I think it would cross...
19 Replies

13329 Views

Last post by farcticox1
Sat May 04, 2019 1:28 pm
first sprinkler valve

Last post by hectmarr
Replies: 6
by Anatine Duo » Wed Mar 13, 2019 9:25 pm

First post

This makes me look like a pnoob but I actually learned a lot.

I find sprinkler valves in the ground and take them home. This is a 1 Hunter chamber...

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Good job, I like your weapon. It has a retro look, and shoots hard. Cute :)

6 Replies

5777 Views

Last post by hectmarr
Sun Apr 14, 2019 10:39 pm
FOOMP

Last post by Brian the brain
Replies: 28
by Brian the brain » Tue Apr 02, 2019 9:09 am
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Today I decided to get back in the game, ( thanks for your support JSR!!) hoping it will bring me some joy :D Using the 2 brass pistonvalve I took...

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It's just the toy / baby-version of one I made a decade ago.. Full metal.. capable of 22 bar..shot there at 12 bar .Can 't .compare that to...
28 Replies

36666 Views

Last post by Brian the brain
Thu Apr 11, 2019 12:43 pm
Balanced Hammer Valves

Last post by Skywalker
Replies: 19
by jackssmirkingrevenge » Mon Dec 17, 2018 1:47 pm
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A good article on the subject showing the different configurations:

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I'd been ignoring friction for the most part. Friction isn't an entirely bad thing for this design, though: the valve-pusher cylinder should *not*...
19 Replies

33129 Views

Last post by Skywalker
Tue Apr 09, 2019 8:43 am
Supersonic peashooter

Last post by jackssmirkingrevenge
Replies: 5
by Skywalker » Sun Mar 31, 2019 3:56 pm

First post

I'm thinking about ways to make a self-contained gun where the energy to fire it is delivered manually by pulling a more-or-less constant force...

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I also saw that you made a pneumatic crossbow long, long ago!

Ah yes, back in the days when balsa wood was an acceptable building material . A...

5 Replies

6455 Views

Last post by jackssmirkingrevenge
Tue Apr 09, 2019 5:50 am
compact can cannon

Last post by Potato Demon
Replies: 4
by Fordas » Thu Aug 09, 2018 8:38 am

First post

hey, i'm new to this forum, this is the second pneumatic cannon I've made and the first one that shoots cans, i'd love to hear your feedback on the...

Last post

Nice! I bet an empty can with a cone on the end would go farther because it weighs less.

4 Replies

4158 Views

Last post by Potato Demon
Thu Apr 04, 2019 5:47 pm
Troublr with barrel sealing piston valve

Last post by jackssmirkingrevenge
Replies: 2
by micquai » Mon Apr 01, 2019 3:20 pm

First post

The piston in the valve won't open when you drop the pressure behind it with the pilot valve. I turned the piston on a lathe put O-rings on it and it...

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If you're filling from the pilot area, have you made provisions for air to leak past the piston into the chamber?

2 Replies

2912 Views

Last post by jackssmirkingrevenge
Mon Apr 01, 2019 6:36 pm
fastest sprinkler valve launcher

Last post by jackssmirkingrevenge
Replies: 1
by Anatine Duo » Mon Apr 01, 2019 1:55 pm

First post

Is this the fastest 1 sprinkler valve launcher at 100 -105 psi with a 26 barrel?

After much chronograph testing and many spurious readings (up to...

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Nice! I'm not aware of any official records but surely if that's your goal at least 150 psi and longer barrel would be a logical progression...

1 Replies

2500 Views

Last post by jackssmirkingrevenge
Mon Apr 01, 2019 2:29 pm
chamber seal versus barrel seal

Last post by Anatine Duo
Replies: 2
by Anatine Duo » Tue Mar 26, 2019 8:53 am

First post

I've been playing around with various sprinkler valves (Hunter, Rainbird, Toro). HUnter and Toro are chamber seals. I converted one Hunter to barrel...

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It's good to know I am at the extremes :)

The Hunter valve that I converted to barrel seal might give slightly better performance but the main...

2 Replies

2724 Views

Last post by Anatine Duo
Sun Mar 31, 2019 3:27 pm
Small Pneumatic Launcher Help

Last post by farcticox1
Replies: 9
by Genadmm » Fri Mar 22, 2019 10:07 pm

First post

Greetings, :D
This is my fist post on this forum and I'm pretty new to it all. I am currently planning to make a small pneumatic line launcher that...

Last post

Over under like this works fine

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Or chamber to the rear (front is just PVC)

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I mostly use these brass fittings, they are...

9 Replies

5937 Views

Last post by farcticox1
Fri Mar 29, 2019 4:01 am
composite tubes

Last post by jackssmirkingrevenge
Replies: 10
by Anatine Duo » Wed Mar 13, 2019 10:11 pm

First post

Here is something I've been working on for a long time. Access to smooth tubing is easy, but access to strong smooth-inside tubing is not always. My...

Last post

If someone ( I think you already know this) is contemplating strengthening a 3d print, always keep in mind the print might flow under pressure. I...

10 Replies

6675 Views

Last post by jackssmirkingrevenge
Mon Mar 18, 2019 4:57 am
Maximizing flight distance

Last post by farcticox1
Replies: 6
by rphaddad » Mon Feb 25, 2019 10:56 pm

First post

Hi:

New to the forum, got lots of great ideas for my son's science fair project here. Trying now to help him interpret the results. We built a...

Last post

Like I made it and forgot I made it :o

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6 Replies

3848 Views

Last post by farcticox1
Thu Feb 28, 2019 5:22 am
A 10-32 QEV for a 40mm projectile?

Last post by hectmarr
Replies: 13
by dtitr » Sat Feb 16, 2019 1:43 pm

First post

Ok so, I'm new to this. I'm making a project that shoots a 40mm projectile out of a 9 barrel. I'm thinking of using this 10-32 QEV:
I'm using a 16g...

Last post

Its operation is very clear. It's quite simple, in general.

13 Replies

6424 Views

Last post by hectmarr
Fri Feb 22, 2019 4:41 pm

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Pneumatic Cannons

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