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

1206685 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

606452 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

859024 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...

Last post

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

1022300 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

393275 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

100359 Views

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

Topics

What would be better/safer

Last post by MrCrowley
Replies: 3
by Sean » Wed Jan 28, 2009 8:43 pm

First post

I just got all the parts for my first pneumatic gun.

I bought a 1/8 NPT Tank Valve to put the air into my chamber. Would it be better and safer to...

Last post

Even if the threads aren't long enough to go through to the second layer, the second layer is 'welded' to the first, creating a chemical bond that...

3 Replies

1523 Views

Last post by MrCrowley
Wed Jan 28, 2009 10:09 pm
First coaxial gun help

Last post by tghhs
Replies: 8
by sputnick » Wed Jan 28, 2009 2:24 pm

First post

Well, Everyone here has heard it a million times before,

My piston gun will not fire, and I need peoples help.

This is my first coaxial gun, and I...

Last post

yeah i made my first coax exzactly like ur's using same material and sizes. i had the same problem but i just wrapped it with some duct tape and it...

8 Replies

2150 Views

Last post by tghhs
Wed Jan 28, 2009 8:48 pm
Pressurisation Chamber

Last post by ALIHISGREAT
Replies: 6
by Biopyro » Tue Jan 27, 2009 2:22 pm

First post

I want to make a clear chamber for experimenting on things under pressure (food items, plants etc), however, I'm unwilling to shell out large amounts...

Last post

regular PVC/webcam?

6 Replies

1400 Views

Last post by ALIHISGREAT
Tue Jan 27, 2009 2:58 pm
Leaky QEV part II

Last post by achs_xc
Replies: 4
by achs_xc » Tue Jan 27, 2009 10:45 am

First post

Thanks for the comments. OK...I checked a few areas and found 3 leaks....fixed those. I even opened the QEV to clean it out. The gun still leaks from...

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Switched the blow gun around...now I can get up 60 psi when I disconnect quickly. I still get a bit of hissing from the barrel, but I still have...

4 Replies

2744 Views

Last post by achs_xc
Tue Jan 27, 2009 2:47 pm
Piston Design Feedback

Last post by psycix
Replies: 4
by tape fist » Sun Jan 25, 2009 10:00 pm

First post

Thank you in advance.

Last post

You only need an equalization hole if your piston seals PERFECTLY along the sides. That means that you have applied orings in the proper way.
But...

4 Replies

2215 Views

Last post by psycix
Tue Jan 27, 2009 9:42 am
cp-100 sprinkiler valve

Last post by psycix
Replies: 7
by tape fist » Thu Jan 22, 2009 9:46 pm

First post

how much can a modded cp-100 sprinkler valve hold and would tis be better then my 1/2 in. brass ball valve?

Last post

Ofcourse he was. So was I.

7 Replies

1918 Views

Last post by psycix
Tue Jan 27, 2009 7:32 am
Leaky QEV...need assistance

Last post by Daltonultra
Replies: 4
by achs_xc » Mon Jan 26, 2009 12:29 pm

First post

I have built my first copper air cannon using a McMasters right angle QEV. My problem is that when I fill the cannon with air I hear a leak coming...

Last post

Try pouring a little water across all your joints while it's pressurized. Any leaks will shows as bubbles. As said above, 90% chance you have a leak...

4 Replies

2406 Views

Last post by Daltonultra
Tue Jan 27, 2009 1:27 am
Piston Actuating Late

Last post by Ragnarok
Replies: 6
by spudkilla224 » Mon Jan 26, 2009 5:29 pm

First post

Hello, I built a piston cannon, and when i exhaust the piston it takes a second or two for the piston to acuate. What could be the problem?

My...

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3: This shouldn't matter that much either, but it could be a contributing factor. The 'exposed frontal area' is area on the sealing face of the...

6 Replies

5085 Views

Last post by Ragnarok
Mon Jan 26, 2009 8:51 pm
piston reattempt

Last post by MrCrowley
Replies: 4
by tape fist » Mon Jan 26, 2009 12:29 am

First post

This is my second attempt on diagramming the piston valve i want to make.Is there any problems?Im sorry i keep asking about this but i don't want to...

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Be cautious with threads, as they will leak.
Uh...no they wont? :?

As long as you tighten them enough with the help of a lubricant such as teflon...

4 Replies

1688 Views

Last post by MrCrowley
Mon Jan 26, 2009 3:35 am
Piston Pilot Problems

Last post by Pilgrimman
Replies: 12
by thedeathofall » Fri Jan 23, 2009 11:47 pm

First post

Hey guys,
I'm not new to the forum but this happens to be my first time posting. I have about 3 years of cannon experience, but there come a time...

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Yeah I had a 1 1/4 piston in a 2 tee sealing a 1 1/2 barrel and it actuated fine even with virtually no surface area. Aslong as the flow rate around...

12 Replies

3377 Views

Last post by Pilgrimman
Mon Jan 26, 2009 3:29 am
paintball weight

Last post by Orpackrat
Replies: 6
by Demon » Sun Jan 25, 2009 11:27 am

First post

I just build myself a marble sniper on a wooden stock mount. It has a 3/4 barrel x 2 foot and a 1.5 x 1 foot chamber with an modded sprinkler valve....

Last post

I had some paintballs weigh in at nearly 3 grams.

If you want a biodegradable projectile that's hard to break, use MonsterBalls paintballs from...

6 Replies

2988 Views

Last post by Orpackrat
Sun Jan 25, 2009 10:55 pm
would this work

Last post by Davidvaini
Replies: 9
by tape fist » Sun Jan 25, 2009 5:24 pm

First post

i want to make an air soft gun out of stuff i have around the house and this is my idea would it work?
sorry there not much detail

Last post

ya im using two bike pumps to reach 300 psi also i have the PVC warped tightly with twine. Sure, if you have all that crap just lying around your...

9 Replies

4331 Views

Last post by Davidvaini
Sun Jan 25, 2009 9:50 pm
New idea for burst disk repeater

Last post by dudeman508
Replies: 4
by dudeman508 » Sun Jan 25, 2009 12:41 pm

First post

After reading this post( ) i thought of this idea

It will be mean for a bolt action of blow forward bolt

Last post

no, my problem was i wasnt in jpeg format yet now it works

4 Replies

1010 Views

Last post by dudeman508
Sun Jan 25, 2009 6:44 pm
Semi-Auto Pneumatic

Last post by iknowmy3tables
Replies: 9
by JohnnyBOOM » Fri Jan 23, 2009 3:48 pm

First post

I was looking for thoughts, criticisms and improvements for the following design before I build it. Thanks for your input! :D

Last post

for you massive dead space I who'd insist on making the piston smaller, and putting in a tee so the is space for much more chamber volume in relation...

9 Replies

4105 Views

Last post by iknowmy3tables
Sun Jan 25, 2009 5:34 pm
cleaning

Last post by Ragnarok
Replies: 8
by tape fist » Sun Jan 25, 2009 12:35 am

First post

i think something got into my sprinkler valve is there any way to clean it

Last post

i think Ragnarok made up a huge big trouble shooting guide for valves so look him up.
When the bloody hell did I do that? Crap, have I been posting...

8 Replies

2262 Views

Last post by Ragnarok
Sun Jan 25, 2009 5:06 pm
Soda Bottle Chamber

Last post by rp181
Replies: 26
by SpudsMcGee » Sun Jan 25, 2009 1:04 am
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I've been skimming thru the forums and I have found very different answers to the question of how much pressure a soda bottle can handle, does anyone...

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I just mesured, the ID of a soda bottle is only .012 in. more then PVC! that's .006 clearance.
26 Replies

6609 Views

Last post by rp181
Sun Jan 25, 2009 4:17 pm
solinoid

Last post by daberno123
Replies: 4
by tape fist » Sat Jan 24, 2009 6:16 pm

First post

i just modded a cp-100 sprinkler valve and i don't have any epoxy to fill in the holes were the solenoid was so could i just use hot glue?

Last post

No problem. Will we be seeing your creation in the showcase section soon?

4 Replies

1514 Views

Last post by daberno123
Sat Jan 24, 2009 6:33 pm
Shot gun pattern

Last post by dudeman508
Replies: 4
by dudeman508 » Fri Jan 23, 2009 11:29 pm

First post

Ok so i added a a piece of sanded copper tube into my half In. barrel hoping it would decrease the spread of my shot gun shells and it worked but not...

Last post

Just air soft bbs with wadding behind them

4 Replies

1532 Views

Last post by dudeman508
Sat Jan 24, 2009 11:44 am
Bolt action coaxial?

Last post by POLAND_SPUD
Replies: 18
by sputnick » Thu Jan 22, 2009 8:01 pm
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Hey everybody, I was thinking about a way to clip feed a coaxial, and I came up with this,

If it has been done, sorry, I did not know, but I would...

Last post

that 1/2 inch pvc is actually 3/4 inch? and 3/4 inch pvc is 1 ?? it's the same with malleable iron pipes... it is the so called nominal size..
18 Replies

4664 Views

Last post by POLAND_SPUD
Fri Jan 23, 2009 4:47 pm
Hammer valve in GGDT

Last post by btrettel
Replies: 3
by john bunsenburner » Thu Jan 22, 2009 1:11 pm

First post

Title says it all i guess. What is the flowcoefficiancy of a hammer valve and what exactly is the seat diameter, ow can i mesure/ calculate both. I...

Last post

Any simulation isn't magic. To get accurate outputs you'll need accurate inputs. Until then anything you get is just a guess.

I believe the point of...

3 Replies

1023 Views

Last post by btrettel
Fri Jan 23, 2009 8:22 am
What to use as a Bumper?

Last post by camdaman38
Replies: 10
by camdaman38 » Thu Jan 22, 2009 1:05 am

First post

Hi everyone,

I has been along time since my last post on here and i am glad to say that i have finished my 2 Tee housed Piston GB Gun. Even better...

Last post

Thanks for all the help guys. Much appreciated

I went to bunnings last night and got a garden knee board thing and i am going to just bolt it onto...

10 Replies

2833 Views

Last post by camdaman38
Thu Jan 22, 2009 10:10 pm
qualifying the d/4 rule

Last post by Pilgrimman
Replies: 24
by jackssmirkingrevenge » Sat Oct 27, 2007 2:59 am
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As most will know, I have been a long time enthusiast of the idea that in a coaxial pneumatic, as the piston only needs to move back 1/4 of the inner...

Last post

Well here is my take on it... I wrote the part at the bottom. It obviously doesn't factor in advanced fluid mechanics or anything, but is reasonable...
24 Replies

8674 Views

Last post by Pilgrimman
Thu Jan 22, 2009 5:43 pm
5ft copper rifel

Last post by MrCrowley
Replies: 20
by maggotman » Wed Jan 21, 2009 4:10 pm
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5ft copper pnumatic 22mm piston valve in a 28mm t vented buy a 1/2 brass sprinkler valve

im thinking of reducing the barrel to 22mm instead of 28mm...

Last post

Oh ok, yeah if it says 200bar, it can take 100bar (assuming itt's not damaged).
20 Replies

4822 Views

Last post by MrCrowley
Thu Jan 22, 2009 5:23 pm
2" piston

Last post by jmeyer1022
Replies: 6
by jmeyer1022 » Tue Jan 20, 2009 9:48 pm

First post

I've looked for what people use besides 1 1/4 coupling and I'm wondering what you've found works best besides solid pvc lathed down.

Last post

I hopefully fixed this, My dad is taking my 1 1/4 coupler to work and putting an O-ring groove in it with his lathe. It should be a perfect fit once...

6 Replies

1539 Views

Last post by jmeyer1022
Wed Jan 21, 2009 5:45 pm
Need a bit of advice on my 2" piston

Last post by jmeyer1022
Replies: 13
by jmeyer1022 » Mon Jan 12, 2009 2:29 pm

First post

Alright so I've finally decided to work/finish this up.

so far I have 1 1/2 pipe running through a dremelled 2-1 1/2 reducer
then going into the tee...

Last post

Ok so I really want to get this first try. I've been going through peoples tee valves, I know different but they all work.

The 2 I've been looking...

13 Replies

3634 Views

Last post by jmeyer1022
Wed Jan 21, 2009 4:52 pm

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Pneumatic Cannons

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