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

930054 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

453611 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

471889 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

639505 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

332769 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

80475 Views

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

Topics

New Ball Valve Handle

Last post by boyntonstu
Replies: 9
by boyntonstu » Wed May 19, 2010 10:29 pm

First post

I removed the brass stop and the ball is able to freely rotate.

I made a coupler nut by brazing 2 M8-1.25 nuts together.

The pulley consists of 3...

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Only $130? I thought they were considerably more expensive. I just assumed they were over $600. I'll have to keep my eyes open for one. It would, at...

9 Replies

1476 Views

Last post by boyntonstu
Thu May 20, 2010 6:22 am
My Second Generation Piston Valve cannon

Last post by Mr.Gadget
Replies: 41
by Mr.Gadget » Sat May 08, 2010 4:53 pm
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Hello Every one.
I love this web site. So much to learn, So many good designs!!!
Well, I put my little brain to work and ended up with my first...

Last post

This Cannon, spawned from the ease of parts that already fit together.
Yes it is 2 slip/slip T. The the barrel side, it has a 2 to 1-1/5 slip...
41 Replies

9683 Views

Last post by Mr.Gadget
Wed May 19, 2010 7:21 pm
Copper spudgun

Last post by Labtecpower
Replies: 20
by Labtecpower » Sun Mar 28, 2010 3:47 am
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This is my newest spud gun. I made it about two weeks ago.

It's build all out of copper pipes. I use a 85 cm, 22 mm pipe as the chamber, and a 15...

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I added a muzzle brake today. I have the idea that it improved accuracy a small bit.
The only bad thing is that the holes in my muzzle brake is...
20 Replies

12264 Views

Last post by Labtecpower
Tue May 18, 2010 1:58 pm
Need some help with my golf ball bolt action mag loader...

Last post by Gun Freak

by Gun Freak » Mon May 17, 2010 7:08 pm

Here's a video, should be self explanitory.

May not be processed right away, wait a few minutes.

0 Replies

2296 Views

Last post by Gun Freak
Mon May 17, 2010 7:08 pm
SSBA 'Q' #2 6mm with qev

Last post by wyz2285
Replies: 4
by Patto » Thu Apr 29, 2010 2:27 am

First post

Hey all .. ok so this really isn't anything new it's the same barrel setup i've already had here with the same style of stock but i recently got...

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you are amazing!!!!!!!love it!!!!!!!!!

4 Replies

3298 Views

Last post by wyz2285
Mon May 17, 2010 3:20 pm
Piston sealing face deforming

Last post by Technician1002
Replies: 22
by Gun Freak » Sun May 16, 2010 2:23 pm
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After maybe 50 shots with this piston it turned out like this:

The edges are kinked and causes it to not seat right every 5 shots or so.
Has this...

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Sometimes this is caused by the narrow edge of the end of the barrel. It cuts into the rubber due to the high force. In 2 of my launchers I glued a...
22 Replies

3961 Views

Last post by Technician1002
Mon May 17, 2010 11:07 am
Repeating crossbow spring idea.

Last post by iknowmy3tables
Replies: 8
by boyntonstu » Fri May 14, 2010 8:16 am

First post

Looks much easier to cock that my 50 pound pistol crossbow used to open a Ball Valve.

I would imagine that 80 to 100 pounds of force would open a BV...

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uhm I'm don't think that's how you calculate it, would the impedance of a ball valve really make the overall time only half as fast as the time for a...

8 Replies

2728 Views

Last post by iknowmy3tables
Mon May 17, 2010 8:09 am
My BV air shotgun needs help

Last post by Cannoneer
Replies: 8
by Marffy » Sun May 16, 2010 5:01 pm

First post

I made a pneumatic shotgun that uses a .5 ball valve and galv. pipe that has a seem. I also need some way to fill it to its max potential. I was...

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Ah this is where ball valves truly shine!!! I am really looking forward to seeing what sort power you get over a longer range,say 60yds? Oh and I...

8 Replies

3621 Views

Last post by Cannoneer
Mon May 17, 2010 1:31 am
wa2000 airsoft sniper build help

Last post by qwerty
Replies: 1
by twizi » Sun May 16, 2010 10:53 am

First post

hey guy i wanted to make a wa2000 airsoft sniper rifle i already have the internols but i need help on how to make a magzine feed tube i am using a...

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To stop the BB rolling down the barrel you can cut a slit in the barrel and strech an o-ring over it this also acts as a hopup.
I think JSR has a...

1 Replies

1649 Views

Last post by qwerty
Sun May 16, 2010 11:02 am
pilot valve questions

Last post by Gippeto
Replies: 6
by c9d » Fri May 14, 2010 10:31 pm

First post

For my project I was going to use a 125 psi safety relief valve as my pilot valve. However after receiving it today, it takes entirely too much force...

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This is the same type of valve used to isolate paintball markers from the co2 supply(mounted on the remote line). Paintball markers typically use one...

6 Replies

1706 Views

Last post by Gippeto
Sun May 16, 2010 12:06 am
reset time of sprinkiler valve

Last post by kydavies
Replies: 6
by kydavies » Sat May 15, 2010 1:10 pm

First post

if i added a stronger spring to a sprinkiler valve it would have a faster reset time so i might be able to get more than 1 shot off?

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it might but you would loose power, ilso sorry im using a bolwgun as my pilot for the sprinkler valve (thought a QEV was the same as a blowgun)...

6 Replies

1954 Views

Last post by kydavies
Sat May 15, 2010 6:21 pm
Acetylene pressure gauge

Last post by POLAND_SPUD
Replies: 5
by MRR » Sat May 15, 2010 11:19 am

First post

I've got a fridge compressor from a friend so I went to a hardware store and bought a new pressure gauge that can display 40 bar. At home I realized...

Last post

heh that's exactly the reason why I bought an acetylene gauge not a regular one...
IIRC I mentioned it a couple of times here

the conclusion is ->...

5 Replies

1544 Views

Last post by POLAND_SPUD
Sat May 15, 2010 1:48 pm
hornet squash ball launcher

Last post by kydavies
Replies: 6
by kydavies » Fri May 14, 2010 11:40 pm

First post

This is my ''mini'' (compared to what i normally build) pneumatic squash ball cannon. i had to scale down te size of my more recent launchers for...

Last post

its a Canadian company

6 Replies

3806 Views

Last post by kydavies
Sat May 15, 2010 1:01 pm
QEV vs Spring Ball Valve Performance Thread

Last post by Technician1002
Replies: 2
by boyntonstu » Sat May 15, 2010 10:34 am

First post

All right, I got the ball valve pilot chronographed at 400 psi - 538.8 fps, a 22.8 fps increase over the ball valve. That translates to 2 fpe...

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The flow coefficient is another very important valve parameter besides speed. Trading one for the other may provide limited performance gains....

2 Replies

1601 Views

Last post by Technician1002
Sat May 15, 2010 11:16 am
Spring loaded ball valve design

Last post by Technician1002
Replies: 32
by Marffy » Wed May 12, 2010 6:48 pm
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The main problem with most spring-loaded ball valves (besides the fact that they are ball valves) is the way you have to set them up. I haven't yet...

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A friend of mine compared the performance of a QEV an his spring loaded BV using the same projectile and barrel.

They were pretty close.

I will try...
32 Replies

14920 Views

Last post by Technician1002
Sat May 15, 2010 11:08 am
Torsion spring on a ball valve

Last post by Technician1002
Replies: 6
by Cannoneer » Fri May 14, 2010 1:13 pm

First post

Hello. I am planing a new project and have a question. It is going to be an all metal ball valve musket,obviously the valve will need to be spring...

Last post

The pressure relief valve on the camp bottles don't open under 250 PSI. This is to prevent explosions and leaks in hot summer weather. I run my...

6 Replies

2902 Views

Last post by Technician1002
Sat May 15, 2010 12:13 am
Slap it or pull it?

Last post by boyntonstu
Replies: 22
by boyntonstu » Wed May 12, 2010 6:51 am
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Using a spring or a sligshot rubber, would the ball valve open quicker if the spring was triggered and immediately began pulling on the handle, or...

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Just a quick note on the boat thing.. This has been modeled a lot. A prop in the back puts the high speed prop wash behind the boat. As far as the...
22 Replies

5171 Views

Last post by boyntonstu
Thu May 13, 2010 6:06 pm
Homemade HPA pump questions

Last post by saefroch
Replies: 28
by saefroch » Tue May 11, 2010 9:57 am
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I am constructing a homemade HPA pump myself since the desire for MOAR PRESSURE is greater than 200 psi allows. So... the questions are: Is the...

Last post

Need a spring with a very low spring constant that won't get pushed off its bearing by a pressure spike.
28 Replies

9162 Views

Last post by saefroch
Wed May 12, 2010 2:08 pm
Bumper Piloting Issues

Last post by spudtyrrant
Replies: 34
by clemsonguy1125 » Mon May 10, 2010 4:10 pm
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On my rocket launcher launcher the piston works fine if the bumpers attached to the piston but when I add the second part of the bumper to the back...

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I just used 2 sheets of 1/4 neoprene for my 3 porter, i have fired it over 100 times, so it seems to be working pretty well.then again i have a...
34 Replies

6452 Views

Last post by spudtyrrant
Tue May 11, 2010 10:23 pm
A 50 pound crossbow pistol to fire a ball valve.

Last post by Marffy
Replies: 10
by boyntonstu » Tue May 11, 2010 6:20 pm

First post

A 50 pound crossbow pistol to fire a ball valve.

Works OK but it needs some tuning.

The oxygen bottle and a gauge plus ball valves at the end of...

Last post

Can you make a spring, pistol grip, and a safety for $15?

That's what they sell for on ebay.

wow, thats cheap. dint know. I'd definitely try...

10 Replies

5575 Views

Last post by Marffy
Tue May 11, 2010 8:29 pm
Natures Fury Rocket Launcher

Last post by clemsonguy1125
Replies: 22
by clemsonguy1125 » Sun May 09, 2010 4:14 pm
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At long last my rocket launcher is done. It started out with a compact light weight piston valve but turned into this. Its designed to shoot nerf...

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Well a threaded adapter got jammed in there and there was nothing to grip with vice grips, I tried to split it with a hammer but that didnt work and...
22 Replies

5246 Views

Last post by clemsonguy1125
Tue May 11, 2010 8:11 pm
Copper Dueling Pistol

Last post by Brian the brain
Replies: 25
by Lockednloaded » Thu Apr 08, 2010 2:40 pm
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This was my first experience with soldering, so to be safe a little extra JB weld was added around the only soldered joint. That join is NOT held...

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thats a shame btb .....You could have given it to me!

I did...virtually...

:D
25 Replies

11576 Views

Last post by Brian the brain
Tue May 11, 2010 3:19 pm
pneumatic barrel to chamber

Last post by MRR
Replies: 4
by kydavies » Mon May 10, 2010 6:29 pm

First post

i am building a pneumatic bazooka that shoots squash balls, i need to know what barrel to chamber length to use ( both chamber and barrel ar 1.5 PVC...

Last post

I don't think that squash balls make good ammunition. They offer way too much friction and will deform inside of the barrel.

4 Replies

1450 Views

Last post by MRR
Tue May 11, 2010 10:34 am
New project

Last post by chinnerz
Replies: 4
by Demon » Mon May 10, 2010 4:42 pm

First post

I might have found a way to improve the esthetics of my previous carbine (lets face it, it was a fail and i got close to zero reply's)

But, i found...

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yeah that bolt sniper armament guy makes some good looking nerf guns ay.

also i dont think your cabine looked bad..... if any thing it looked a bit...

4 Replies

1580 Views

Last post by chinnerz
Tue May 11, 2010 1:16 am
What am I doing wrong here?

Last post by mark.f
Replies: 16
by maverik94 » Sun May 09, 2010 4:25 pm
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Ok, my latest project is building an in-line (non-coaxial) piston valve. I have it completely built, except for one problem...it won't seal. It's...

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Hmmm... if it is ground smoothly, I don't see why it would be binding. I'd look for other culprits...
16 Replies

4657 Views

Last post by mark.f
Mon May 10, 2010 8:51 pm

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