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

917310 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

449174 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

422779 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

627109 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

330709 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

79550 Views

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

Topics

Auto Tennisball Launcher

Last post by chenslee
Replies: 12
by jackssmirkingrevenge » Sun Oct 04, 2009 12:31 am

First post

Not mine, found this on youtube.

Performance is (perhaps intentionally?) sh1te and rate of fire grannyesque, but a well made project nonetheless.

Last post

This guy and I conversed through youtube a while back. He admited to being a controls guy rather than a mechanical guy.

I found his videos and then...

12 Replies

3218 Views

Last post by chenslee
Sun Oct 04, 2009 7:41 pm
What type of breech?

Last post by POLAND_SPUD
Replies: 5
by Dave_424 » Sun Oct 04, 2009 11:50 am

First post

Hey, im making a popoff QEV airsoft gun and need some opinions about what breech i should machine. I want it mechanical so no double feeds etc not...

Last post

well yeah I would have used 3/2 valve but the only one I could use then was 5/2 valve (because both of 3 way valves that I have are 1/8 and I didn't...

5 Replies

1129 Views

Last post by POLAND_SPUD
Sun Oct 04, 2009 1:23 pm
Can I merge an extracting bolt and a springer's piston?

Last post by Technician1002
Replies: 1
by Tsukiten » Sun Oct 04, 2009 10:17 am

First post

Sup guys, been a while for me, but I need your help! :D

I've been designing a gun that feeds and extracts cartridges.
The extraction isn't a...

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A link to the boltsniper creation would be nice. There is a user called boltsniper on SpudFiles and a site www.boltsniper.com with over 1/2 dozen...

1 Replies

748 Views

Last post by Technician1002
Sun Oct 04, 2009 11:13 am
blowgun recommendation

Last post by jackssmirkingrevenge
Replies: 6
by boyntonstu » Sat Oct 03, 2009 7:06 pm

First post

I am running about 450 psi and I may go to 600 psi.

The 3/8 ball valve is too slow.

What blowgun would hold this pressure and have a good trigger...

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I've found most blowguns are good for 300-400 psi, sprinkler valves are usually rated to 145 psi or so, it doesn't mean that they'll explode at 150...

6 Replies

970 Views

Last post by jackssmirkingrevenge
Sun Oct 04, 2009 7:36 am
Ideal piston/pilot design criteria

Last post by psycix
Replies: 2
by boyntonstu » Sat Oct 03, 2009 4:15 pm

First post

Are these assumptions correct?

Piston should be as light as possible.

The piston should fit the pilot without leaking.

The piston sealing area...

Last post

Piston should be as light as possible.
Yes. Lighter pistons move faster, and they don't slam into the back as hard as heavier ones.

The piston...

2 Replies

795 Views

Last post by psycix
Sat Oct 03, 2009 4:32 pm
Loctite 55 ??

Last post by Daltonultra
Replies: 6
by boyntonstu » Tue Sep 29, 2009 10:04 am

First post

I wonder if twisting Teflon tape into a cord would also work?

Have you tried Loctite 55?

BoyntonStu

Last post

That's usually an issue of just not using enough, not an issue I see this stuff solving...

6 Replies

2339 Views

Last post by Daltonultra
Fri Oct 02, 2009 7:12 pm
My First Pneumatic Cannon

Last post by K8TOW
Replies: 8
by nyharley » Wed Sep 30, 2009 9:09 pm

First post

I have just built my first Pneumatic Cannon. It is just a regular spud cannon, but I am curious to know how you guys a loading these? With my...

Last post

you might also try using a camlocks ( ) or ( ).i just did a google and came up with these 2 websites.i will be buying them for my pneumatic gun.i...

8 Replies

3394 Views

Last post by K8TOW
Thu Oct 01, 2009 9:00 am
Coxial rifle

Last post by jackssmirkingrevenge
Replies: 21
by tghhs » Wed Sep 30, 2009 4:49 am
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Hey guys,

this is my latest creation:

It has a 1/4 inch barrel in a 40mm pn 12 pvc chamber. The piston is a solid teflon plug that i tuned down...

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Thank you for looking out for me so i dont blow my head off :P

It's not that we personally care about your safety, we just don't want another frog...
21 Replies

6385 Views

Last post by jackssmirkingrevenge
Thu Oct 01, 2009 2:48 am
pumps pumps driving me crazy

Last post by cannon monkey
Replies: 7
by cannon monkey » Mon Sep 28, 2009 9:06 pm

First post

hey sorry guys it 10 pm i been searching the web and spudfiles for plans and designs and how too's on building a high pressure pump i need somthing...

Last post

well c11man im picking 1/2 or 3/4 inch

and my chmber is a 9 oz c02 bottle and maybe some 13 oz hpa contaners(1800 psi ratings)

any idead on size or...

7 Replies

3153 Views

Last post by cannon monkey
Wed Sep 30, 2009 11:18 am
Closing slam on seal

Last post by tghhs
Replies: 8
by tghhs » Mon Sep 28, 2009 6:31 pm

First post

Hey people,

So i just finished my coaxial (i'll post it when it's working) it's 1/4inch barrel and 40mm pn 12 chamber.

my problem is that when i...

Last post

Argh i see what u mean, yeh i reckon that'd hold it :)

8 Replies

2140 Views

Last post by tghhs
Tue Sep 29, 2009 8:04 pm
Closing slam on seal

Last post by tghhs

by tghhs » Mon Sep 28, 2009 6:31 pm

Hey people,

So i just finished my coxial (i'll post it when it's working) it's 1/4inch barral and 40mm pn 12 chamber.

my problem is that when i...

0 Replies

1614 Views

Last post by tghhs
Mon Sep 28, 2009 6:31 pm
Closing slam on seal

Last post by tghhs

by tghhs » Mon Sep 28, 2009 6:30 pm

Hey people,

So i just finished my coxial (i'll post it when it's working) it's 1/4inch barral and 40mm pn 12 chamber.

my problem is that when i...

0 Replies

1617 Views

Last post by tghhs
Mon Sep 28, 2009 6:30 pm
Closing slam on seal

Last post by tghhs

by tghhs » Mon Sep 28, 2009 6:28 pm

Hey people,

So i just finished my coxial (i'll post it when it's working) it's 1/4inch barral and 40mm pn 12 chamber.

my problem is that when i...

0 Replies

1717 Views

Last post by tghhs
Mon Sep 28, 2009 6:28 pm
M I safe with M?

Last post by jackssmirkingrevenge
Replies: 1
by boyntonstu » Mon Sep 28, 2009 12:12 pm

First post

I now realize that my 3/4 cannon was made with type M tubing.

I incorrectly thought that L meant 'lighter'.

How much pressure will 3/4 type M take...

Last post

Have a look ;)

1 Replies

677 Views

Last post by jackssmirkingrevenge
Mon Sep 28, 2009 12:48 pm
My new coax copper hunter (New "gun metal paint" u

Last post by BlackH
Replies: 45
by BlackH » Tue Aug 26, 2008 5:37 am
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My new copper gun with piston and a nice aluminum sight and detachable silencer with steel wool sepressor.

Ask away

Work at round about 200psi now...

Last post

no it bleeds out of the botom of the handle look here ( ) I use a ZAR 50 cent to block off the sholder bleed
45 Replies

23609 Views

Last post by BlackH
Mon Sep 28, 2009 2:14 am
Pilot leak down question.

Last post by jackssmirkingrevenge
Replies: 4
by boyntonstu » Sat Sep 26, 2009 3:21 pm

First post

I have seen pilot leaks when experimenting with my cannon with no piston movement.

Many folks warn of the danger of pilot leaks.

I have seen 300...

Last post

There is no such thing as a safe cannon.... Follow firearm rules... ie, it's always loaded, don't point it anything you don't want destroyed, and...

4 Replies

1454 Views

Last post by jackssmirkingrevenge
Sun Sep 27, 2009 1:55 am
New and Simple idea for breech loading?

Last post by Lokoyo
Replies: 2
by Lokoyo » Sat Sep 26, 2009 1:56 pm

First post

I'm sorry if this has been posted before :( I'm not on too often here.

My idea is to use a hot glue gun to make a breech.
(1) So you get a sample...

Last post

Well my barrel fits to my cannon (interchangable) by just pushing the barrel into the female.

Now that I think about it, you could just use a...

2 Replies

1419 Views

Last post by Lokoyo
Sat Sep 26, 2009 2:29 pm
revo semi 2 few questions

Last post by inonickname
Replies: 15
by colty-bear » Fri Aug 21, 2009 4:16 pm
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ok im getting parts i almost have parts so i make a sucky diagram of how i think it will work

a pin rotates this little track whan you push the...

Last post

Excuse me? You come in here, say your excellent at drawing cams, say that we're stupid, tell him that it's easy, don't help him at all, and tell him...
15 Replies

5595 Views

Last post by inonickname
Fri Sep 25, 2009 9:53 pm
Clear Piston at an angle

Last post by jook13
Replies: 7
by boyntonstu » Fri Sep 25, 2009 7:58 am

First post

Unusual design.

Very instructive.

BoyntonStu

Last post

Yeah, as soon as I read the title, I knew what cannon you were talking about. It still stands to be a sweet valve design.

7 Replies

1741 Views

Last post by jook13
Fri Sep 25, 2009 5:23 pm
a couple questions about my first shoulderfired pneumatic

Last post by Jaygnar
Replies: 15
by Jaygnar » Sat Sep 19, 2009 2:09 pm
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This is my first post, so let me start off by saying hello to everyone. I'm very happy that I found this site and have been pouring over a lot of the...

Last post

Here are some damage pics. I was shooting at a box fairly firmly stuffed with a sporadic mix of newspaper cardboard and low and high density...
15 Replies

4941 Views

Last post by Jaygnar
Fri Sep 25, 2009 11:06 am
Using 8,000 BTU A/C compressor: A few tricks

Last post by jackssmirkingrevenge
Replies: 2
by boyntonstu » Fri Sep 25, 2009 10:15 am

First post

I learned that the hose clamp makes life easier.

Also, relieving the pressure makes the snap fitting a snap!

The blue rope is use as the 3 point...

Last post

That's a nice setup :) However, you sure it is safe to use the PVC for a coupler?

The PVC is just there to support the pipe.

Very nice setup, I...

2 Replies

946 Views

Last post by jackssmirkingrevenge
Fri Sep 25, 2009 10:49 am
Degree of piston seal and thread sealant question.

Last post by D_Hall
Replies: 10
by boyntonstu » Thu Sep 24, 2009 6:02 pm

First post

How long should a well designed piston hold 400 psi before it leaks down to 350 psi (if at all)?

Other than Teflon tape, what other thread sealant...

Last post

I've also found blue/red loctite to work very well.
This.

Once upon a time I used to play a lot of paintball. Leaks were always a problem. I tried...

10 Replies

2179 Views

Last post by D_Hall
Fri Sep 25, 2009 10:08 am
Has anyone seen this valve?

Last post by psycix
Replies: 8
by jcinco101 » Wed Sep 23, 2009 7:21 pm

First post

Looking to expand my cannon but I can't find this valve. Does anyone know where to purchase or the name of this valve. It has M7 on one side and A, B...

Last post

as others have mentioned its prolly not worth it to get this particular valve. Whats wrong witth adding a elbow to a valve and having a over under?...

8 Replies

1033 Views

Last post by psycix
Fri Sep 25, 2009 9:21 am
300 psi+ Piston rifle

Last post by al-xg
Replies: 34
by CpTn_lAw » Mon Apr 27, 2009 12:16 pm
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Hello guys!!

I'm here to present to all of you, my newest build, a (relatively) high-pressure,barrel-sealing, piston pneumatic rifle ! Now, this is...

Last post

I wish i had a QEV!! would make my life easier!!!! They're so expensive in france...I can't afford one...

Order one from the UK instead, total cost...
34 Replies

10578 Views

Last post by al-xg
Thu Sep 24, 2009 8:57 pm
sprinkler valve problem

Last post by Brian the brain
Replies: 8
by geardog32 » Tue Sep 22, 2009 3:41 pm

First post

so this week i put my sprinkler valve cannon on a diet and cut down the chamber to half its size and i also gave it a shorter barrel. it worked...

Last post

I used the plastic stick from a lollypop once..if it fits in it's perfect..
Heat up the ends and they swell up, sealing it into the hole.

8 Replies

1926 Views

Last post by Brian the brain
Thu Sep 24, 2009 4:04 pm

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