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

1125133 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

552241 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

821181 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

967081 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

374887 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

92406 Views

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

Topics

Reincarnation - 2" PVC piston valve

Last post by cannon monkey
Replies: 9
by Slauma » Sun Dec 20, 2009 1:13 pm

First post

Here's my second pneumatic, it's a 2 piston valve. This is basically a scaled down version of my first cannon that I could never get to work very...

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great idea.. but i was wondering if using a spring at the piston would solve this problem?

not really sure what to say cause this is on an old...

9 Replies

5139 Views

Last post by cannon monkey
Sat May 22, 2010 8:01 am
HP pump hose head?

Last post by Gun Freak
Replies: 1
by FighterAce » Fri May 21, 2010 8:39 am

First post

A few days ago I (almost) completed my 40+ bar pump but its still missing a pressure gauge and hose. The pressure gauge will be easy to get but my...

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Well you could get one of those tire filling blowguns and thread it onto the end of the hose...

1 Replies

1165 Views

Last post by Gun Freak
Fri May 21, 2010 7:09 pm
Pop can hang time.

Last post by Ragnarok
Replies: 14
by Technician1002 » Mon May 17, 2010 11:08 pm

First post

I'm going to toss this out for discussion. Find the hang time in this video. You can hear the can land. The thud is not very loud due to the...

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My understanding is that there is no driving force to minimize drag if the shape has uniform density.
Hmm... that makes me think. Homogeneous...

14 Replies

4590 Views

Last post by Ragnarok
Thu May 20, 2010 7:38 pm
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

1529 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...

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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

12607 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

14101 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

3268 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

3378 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

4177 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

2855 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

5943 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...

Last post

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

2124 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...

Last post

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

1765 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?

Last post

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

2041 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...

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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

1993 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

3929 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

2856 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...

Last post

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

16772 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

3606 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

8034 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

9346 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

6774 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

5729 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

5407 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...

Last post

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

I did...virtually...

:D
25 Replies

11902 Views

Last post by Brian the brain
Tue May 11, 2010 3:19 pm

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