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

904007 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...

Last post

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

439767 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

378506 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

617494 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

328439 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

78351 Views

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

Topics

Advice on Piston

Last post by covey12
Replies: 28
by limbeh » Thu Mar 12, 2009 10:51 pm
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Hi,

I've just built a barrel seal piston in a 4 tee supplying a 3 barrel.

The sealing face of the piston is 3mm thick neoprene of 70% hardness. The...

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i dont think ive ever seen a piston bigger than 3 inches, this should be good when its done.
28 Replies

7135 Views

Last post by covey12
Thu Mar 26, 2009 8:08 pm
Car Launcher xD

Last post by psycix
Replies: 9
by FishBoy » Wed Mar 25, 2009 7:54 pm

First post

Well this is from top gear, the video pretty much explains everything. Enjoy!

Last post

That would be a launcher car. Not a car launcher.
For me, the xD in the topic title adds to the impression of launching cars.

9 Replies

3393 Views

Last post by psycix
Thu Mar 26, 2009 8:31 am
MP1.0 --- psycix's 1/2"QEV gun

Last post by Brian the brain
Replies: 17
by psycix » Sat Mar 21, 2009 4:25 pm
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I hereby present to you: my Main Project 1.0 , the beginning of a highly customizable gun with many upgrades to come.

I would like to thank Brian...

Last post

Hey...I'm not working on my tool....that's a dirty thing to say.

I'm actually building a rifling machine....

so far things look promising...
17 Replies

8808 Views

Last post by Brian the brain
Thu Mar 26, 2009 6:36 am
2.5" piston valve help

Last post by LCTChamp
Replies: 6
by LCTChamp » Wed Mar 25, 2009 5:45 pm

First post

Well my 2 sprinkler valve on the 2SVGBG ( the gun is here ) quit working and I haven't built a piston valve yet. So I decided to build a 2 1/2 piston...

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The problem with your plan is you wont have any surface area on the outside of the barrel for the air to push the piston back. It still might work...

6 Replies

1868 Views

Last post by LCTChamp
Thu Mar 26, 2009 6:04 am
pneumatic mine

Last post by jackssmirkingrevenge
Replies: 4
by daxspudder » Wed Mar 25, 2009 11:25 pm

First post

Okay, a little while back, there was a post about a glade motion sensor mine , well I decided I would make one of my own, out of parts, mine uses 3...

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Reminds me of a similar system used by the Germans in WW2 with wing mounted upward firing cannon on an Me163 rocket fighter that were triggered by...

4 Replies

2466 Views

Last post by jackssmirkingrevenge
Thu Mar 26, 2009 1:05 am
Semiautomatic tennisball gun

Last post by colty-bear
Replies: 14
by colty-bear » Tue Mar 17, 2009 5:35 pm

First post

I am currently working on a semiautomatic tennisball gun. I first got the idea watching Rob Dyrdeck's Fantasy Factory when i saw his. After that I...

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Yea, it would be an easy fix. I was going to use between 20-23 inches of 3 inch pvc piping

14 Replies

7472 Views

Last post by colty-bear
Wed Mar 25, 2009 9:30 pm
piston help

Last post by jrrdw
Replies: 9
by covey12 » Wed Mar 25, 2009 4:59 pm

First post

i need help with my piston valve im making, ive read alot of the howto and there is one thing im not clear on, how much space should there be between...

Last post

The forum echo is ringing out load. This has been covered a bunch of times, type piston in the search box and Search found 13762 matches on the...

9 Replies

2239 Views

Last post by jrrdw
Wed Mar 25, 2009 9:14 pm
help with bumper please

Last post by c11man
Replies: 16
by c11man » Sat Mar 21, 2009 3:01 pm
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i am almost done building a 4inch piston with 3inch porting valve. the piston is a 3inch coulpler modded to fit very nicely inside of a 4inch pipe. i...

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well i am hoping that i dont have to open it up very often so i will be fine with the bolts. Plus i like the look alot better

i might get some 3inch...
16 Replies

5397 Views

Last post by c11man
Wed Mar 25, 2009 5:31 pm
making a piston valve in a 1.25" galvanized tee

Last post by ramses
Replies: 11
by JDP12 » Wed Mar 25, 2009 8:56 am

First post

Hey all,

I've been inspired by the surge of sawed off guns around and I decided that I want one..

However I've run into a couple design issues I...

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I just had the same difficulties. I used a drilled out reducing copper male adapter to get a piece of 1/2 copper pipe into a 3/4 tee. I will have the...

11 Replies

1723 Views

Last post by ramses
Wed Mar 25, 2009 12:24 pm
Gunstock question

Last post by Ragnarok
Replies: 2
by Demon » Wed Mar 25, 2009 6:57 am

First post

I've been ( as many other ) really impressed by the cool looking of this gun:

But for me, the only small and cheap caliber that i can use are...

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There is a greater dependence on the diameter of your chamber than that of your barrel.

After all, the barrel on my air rifle is 20mm outer diameter...

2 Replies

820 Views

Last post by Ragnarok
Wed Mar 25, 2009 8:58 am
Helps on 2" porting piston valve

Last post by mark.f
Replies: 5
by jmeyer1022 » Tue Mar 24, 2009 10:32 am

First post

So far I've been trying to come up with a 2 tee with 2 porting without using an adapter on the outlet side, but so far that's the only way I can...

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There's really no practical way other than somehow getting it all to work in a threaded tee. If you were to get a larger tee, then there's really no...

5 Replies

1402 Views

Last post by mark.f
Tue Mar 24, 2009 7:41 pm
Small Airsoft Coaxial Pistol

Last post by poppamies
Replies: 11
by CrashTestDummy II » Tue Jan 13, 2009 7:35 pm

First post

I just finished this recently, and it's a bunch of fun to plink around with in my yard. This is also my first (working) coaxial. :D

The chamber is...

Last post

cool gun! wen i saw that damage piucture i think i dont want to get shot by that!

11 Replies

5332 Views

Last post by poppamies
Tue Mar 24, 2009 3:01 pm
Brass tubes

Last post by btrettel
Replies: 1
by skyjive » Tue Mar 24, 2009 1:19 am

First post

Hi all, just got some telescoping brass tubes from McMaster, as I figure they'll be just the ticket for a bolt system for a semi. When they arrived...

Last post

With a typical safety factor of 2.5 these should have a pressure rating of about 200 psi each with failure defined as yielding.

1 Replies

921 Views

Last post by btrettel
Tue Mar 24, 2009 8:15 am
2'' Piston 1.5inch Porting finaly done

Last post by mark.f
Replies: 13
by elitesniper » Mon Jan 21, 2008 8:40 pm

First post

This is my 2 inch piston 1.5porting i have finaly completed the piston is a 1 1/4 coupler sealing face is a toliet plunger rubber, i have tested this...

Last post

Chris, just tape off your fittings with masking tape to control getting the primer everywhere, and then other than that just let gravity control it.

13 Replies

4368 Views

Last post by mark.f
Mon Mar 23, 2009 9:09 pm
how to attach high-stress fittings

Last post by jimmy101
Replies: 7
by FishBoy » Sun Mar 22, 2009 6:23 pm

First post

I want to attach a fitting to the 3/16 steel (Al?) rigid tubing which is the output on my fridge compressor so that it will have a 1/4 threaded end....

Last post

They are just assembled with a pair of wrenches. For one manufacturer's instructions see

Usually, compression fittings are rated to a higher...

7 Replies

2844 Views

Last post by jimmy101
Mon Mar 23, 2009 3:41 pm
math help needed

Last post by Ragnarok
Replies: 10
by Demon » Sun Mar 22, 2009 5:46 pm

First post

I would need help for maths to know how much shot of 40 psi i could fill
a 1.5 inch per 8 inch chamber

I am not shure to know how much is the...

Last post

300 times! that is a lot!
It did seem like a big number to me when I did the maths, but I'm pretty sure it's right.

A 15 ci chamber at 40 psi is...

10 Replies

2306 Views

Last post by Ragnarok
Mon Mar 23, 2009 3:27 pm
sprink break proj, need some help

Last post by c11man
Replies: 19
by grock » Fri Mar 20, 2009 11:06 pm
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much to the horror of my airsoft buddies, i am building a 3 bore cannon over sprink break. im thinking of using 2 4 , 5' chambers, feeding a 5-6' 3...

Last post

i agree with chressilvarmancs about the only needing one valve. i have one 4inch with 3inch porting on the cannon i am building and ggdt says that i...
19 Replies

4573 Views

Last post by c11man
Mon Mar 23, 2009 7:46 am
Wiki Page on Toolies Valve

Last post by JDP12
Replies: 11
by mark.f » Fri Mar 20, 2009 11:01 am

First post

I just made a short page on a Toolies type piston valve, here .

I'm just posting this to ask you guys to read it. I wrote up my understanding of the...

Last post

hmm good page on it so far... I'd say add ed's pictures though.

Big ed- how do you fill the chamber part? Is the back piston not a perfect seal?...

11 Replies

2880 Views

Last post by JDP12
Sun Mar 22, 2009 9:00 pm
My First Piston Experimenting with Pics and Damage

Last post by Braddubya
Replies: 21
by Braddubya » Wed Jan 07, 2009 12:33 am
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I was looking at some scrap PVC and parts I had laying around and decided I would build a mini piston gun so I could at least get my feet wet with...

Last post

Now that the snow has melted im thinking of building an upscaled version. Ill keep you all updated
21 Replies

7543 Views

Last post by Braddubya
Sun Mar 22, 2009 5:34 pm
Pressure testing

Last post by jimmy101
Replies: 9
by skyjive » Fri Mar 20, 2009 5:16 pm

First post

Hi all, I have a copper gun which I have been using at up to 200 psi without trouble but want to take higher. I was thinking of pressure testing it...

Last post

When doing the pressure test, make sure the air hose is restrained by something. Don't want the hose wipping about at high speed if something fails....

9 Replies

2320 Views

Last post by jimmy101
Sun Mar 22, 2009 12:23 pm
Fridge compressor help

Last post by ralphd
Replies: 4
by burito » Sun Mar 22, 2009 6:34 am

First post

Ok, basically i have a fridge compressor (out of water cooler acutally, but exactly the same otherwise) which i've extracted, and wired up; but...

Last post

Those compressors are designed to work in a sealed environment. Whatever oil that gets pumped out will make it back in. The flow is also controlled....

4 Replies

1602 Views

Last post by ralphd
Sun Mar 22, 2009 10:35 am
Pump Action AA battery Gun

Last post by MajTom
Replies: 3
by MajTom » Sat Mar 21, 2009 11:54 am

First post

So I have been thinking about how to make a Pump Action AA battery gun and after searching the forums I have a few questions. I have a sort of...

Last post

Thanks for your help guys.

That link was really helpful. A ball valve on a stick--both simple and elegant. I should be able to adapt it to my...

3 Replies

1794 Views

Last post by MajTom
Sun Mar 22, 2009 7:57 am
Fire Extinguisher Tank (Can't find fitting)

Last post by ralphd
Replies: 6
by BA_Noob » Sat Mar 21, 2009 9:48 am

First post

I am building my first cannon, and i have all the things i need. all but 1: i have what looks to be an old amerex B417 ABC (Dry Cem) fire...

Last post

In my opinion the epoxy won't work because of the pressure. Get something close then have someone weld it in for you.

6 Replies

8415 Views

Last post by ralphd
Sat Mar 21, 2009 3:11 pm
Finnaly The 2SVGBG

Last post by LCTChamp
Replies: 9
by LCTChamp » Wed Mar 11, 2009 7:12 pm

First post

First of I want to thank everyone who helped me modify this valve. The name stands for 2 inch sprinkler valve golf ball gun. I ordered the valve 4...

Last post

Well I hooked up my compressor today and let the gun fill for about thirty seconds. I looked at the gauge and it said 0 psi. The air was going...

9 Replies

3128 Views

Last post by LCTChamp
Sat Mar 21, 2009 1:53 pm
Launcher Problem

Last post by ralphd
Replies: 7
by ralphd » Fri Mar 20, 2009 5:40 pm

First post

I just finished my first Pneumatic Tennis Ball Launcher. I implemented a barrel sealing piston with an over/under design. To actuate the piston I...

Last post

Well, a 1/2 ball valve is easy enough. I''ll try to pick one up this weekend. If it works out then my next mod will be the sprinkler valve. Thanks...

7 Replies

2119 Views

Last post by ralphd
Sat Mar 21, 2009 8:18 am

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