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

1201269 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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First post

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

604756 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

857651 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

1020575 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

392529 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

100020 Views

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

Topics

Pilotting with a QEV?

Last post by Tipsypyro
Replies: 2
by Tipsypyro » Sun Feb 15, 2015 6:27 pm

First post

I know ahead of time that this is probably a dumb question, but I have been raking through the archived posts for the last few nights hoping to find...

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Yes, it does. My question is how do I equalize the pilot area?
Ok, I got it working by drilling the piston and putting in a spring. I will post some...

2 Replies

2085 Views

Last post by Tipsypyro
Tue Feb 17, 2015 1:18 pm
Pneumatics: Without Expensive Tools

Last post by mako
Replies: 10
by mako » Fri Feb 13, 2015 12:40 am

First post

Hey, guys. I got my propane hammer valve working properly today!! It's the first airgun I've managed to get to the point of real functionality and...

Last post

Totally cool. His work on the trigger mech was beautiful.

I knew the barrel was steel, but I noticed that the dovetailed locking pieces were brass....

10 Replies

14101 Views

Last post by mako
Tue Feb 17, 2015 10:27 am
Need help with paintball tank!

Last post by Solar
Replies: 13
by ninjamonkey127 » Thu Jan 15, 2015 2:51 pm

First post

Hello everyone! I just got done working on my coaxial air rifle! I bought a guerrilla air 13/3000 hpa tank with regulator and a Palmers low pressure...

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Submersible systems who make the Spare Air for Scuba diving use paintball compatible threads. They have 2.25 diameter tanks for $95 that are up to...

13 Replies

7860 Views

Last post by Solar
Mon Feb 09, 2015 10:45 am
Charging a pen gun

Last post by Tipsypyro
Replies: 4
by Tipsypyro » Thu Jan 29, 2015 9:29 pm

First post

I know I probably missed existing info, but I looked a lot. What is the best way to keep a pen gun from firing on pulling off the chuck? Is there a...

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Thank you.

4 Replies

3356 Views

Last post by Tipsypyro
Thu Feb 05, 2015 4:18 pm
Using dual QEVs...

Last post by Ianbuckwell
Replies: 2
by Ianbuckwell » Fri Jan 30, 2015 5:55 am

First post

Sorry for so many threads, but have searched and have no one to ask, I see it has been done before and posted on these forums. I now have purchased a...

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Ok, thanks Don't worry I am having plenty of experience with trying and faillimg on my current gun, just off to try something now as the bolt keeps...

2 Replies

1848 Views

Last post by Ianbuckwell
Sun Feb 01, 2015 3:33 am
Net gun

Last post by wdr0
Replies: 3
by wdr0 » Tue Jan 20, 2015 5:36 pm

First post

Hey everyone. Have been pretty busy lately but I did recently get a chance to build something. It is sort of in the opposite direction (less...

Last post

Well I tested with net and it works, dosent have the greatest range, but a net gun isn't exactly a practical devise. I ended up changing the design...

3 Replies

2597 Views

Last post by wdr0
Wed Jan 28, 2015 7:01 pm
First build "Semi truck tire bead seater"

Last post by bravootome
Replies: 3
by Cooter_E_Lee » Sun Jan 25, 2015 3:24 pm

First post

First post. I am entirely new to the hobby of cannons and what I have built is a Semi truck tire bead seater. However, I will NOT be trying to write...

Last post

You may upload a video on youtube and post a link with the post a replay or edit post using the youtube button right up.
Make sure you paste the...

3 Replies

4335 Views

Last post by bravootome
Mon Jan 26, 2015 12:48 pm
QEV question

Last post by jrrdw
Replies: 15
by vng21092 » Mon Jan 19, 2015 12:32 pm
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I know this might sound redundant. But how do you get a QEV to work semi-auto when filling from chamber? In my last build I put a ball valve between...

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That video is private! Youtube should do away with that crap..... :roll:

I changed the link, it should work now.

Nice shooten!
15 Replies

6948 Views

Last post by jrrdw
Tue Jan 20, 2015 4:09 pm
How to do calculations for a cannon distance, angle, etc?

Last post by jrrdw
Replies: 5
by aj23 » Mon Jun 04, 2012 4:55 pm

I know there are programs out there for the calculations, but I need the actual data and each step in the calculations for a physics project. Does...

5 Replies

4735 Views

Last post by jrrdw
Tue Jan 20, 2015 3:23 am
1 shoot

Last post by bravootome
Replies: 6
by bravootome » Mon Dec 22, 2014 9:19 am

First post

Playing around shooting a big bone by 25-yards.
and a metal targt in the picture by 42 yards.

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Do you have a build thread/gun information? Sounds like my sort of gun!

This is the on with th bone shoot :

this is a hommade qev airgun iv made...

6 Replies

3774 Views

Last post by bravootome
Mon Jan 19, 2015 3:59 am
Soldering copper fittings

Last post by mako
Replies: 14
by mako » Sat Jan 10, 2015 10:28 pm

First post

Hey, guys!

It's been a REALLY long time since I've been on here.... Life has a habit of keeping you busy, eh?

Anyway, I've got a question for the...

Last post

Interesting. Y'really do learn something new every day, don't you? ;)

Hahaha. Yeah, it's more wasteful, but when you're playing an action sport...

14 Replies

8889 Views

Last post by mako
Thu Jan 15, 2015 3:31 pm
regulator

Last post by matti
Replies: 9
by jonpo » Mon Jan 12, 2015 4:33 am

First post

hey guys, ive been searching for what feels like endlessly for an 'inline' regulator that i would be able to thread on to my 'air tank' (steel pipe),...

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If you're building a pcp...why do you need a regulator? The valve should self regulate...opening more and with increasing dwell as the pressure...

9 Replies

4231 Views

Last post by matti
Thu Jan 15, 2015 12:57 pm
Fiberglass barrels and pressure vessels.

Last post by Gippeto
Replies: 7
by Ichabod » Thu Jan 08, 2015 10:48 pm

First post

Hey guys,
I was wondering if anyone here has used either filament wound fiberglass tubes or fabric wrapped tubes for barrels or pressure vessels? I...

Last post

. Any tips or ideas for this?

They have this stuff called seamless tubing ...most often made of metal ....my favorites are 1026, 4130 or 2024...it...

7 Replies

3954 Views

Last post by Gippeto
Thu Jan 15, 2015 5:22 am
My new updated Air gun - (350psi)

Last post by Tinodedino
Replies: 1
by ham_machine » Sat Sep 27, 2014 3:29 am

First post

I have built a new air-gun, very similar to my old one, however this one is much stronger and durable. My old one can be found here -...

Last post

can you explain the working of the trigger mechanism a bit more or maybe show picture/schematics? I don't really understand it yet.

1 Replies

2811 Views

Last post by Tinodedino
Mon Jan 12, 2015 1:27 pm
I have a few questions new to spuding

Last post by GonzoInferno
Replies: 3
by Maverik3 » Thu Jan 08, 2015 9:56 pm

First post

So im trying to make a pneumatic bolt action air cannon. My question is that my design makes it so that the projectile will start at about 6'' down...

Last post

Considering the loading mechanism is a bolt action, I'm assuming the 6 is due to the required stroke of the bolt. If so, the air flow would probably...

3 Replies

2577 Views

Last post by GonzoInferno
Sat Jan 10, 2015 4:09 pm
GGDT help please?

Last post by DYI
Replies: 3
by vng21092 » Fri Jan 09, 2015 2:30 pm

First post

So I just downloaded GGDT because I wanted a general idea of the performance I'd get with a project I had in mind. So to learn how to use the program...

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What does a loose fitting barrel mean? Also, thoughts on flow coefficient, results seem constant at all percentages. Thanks

The projectile is...

3 Replies

2224 Views

Last post by DYI
Fri Jan 09, 2015 4:19 pm
Please explain how this works?

Last post by Ianbuckwell
Replies: 4
by Ianbuckwell » Thu Jan 01, 2015 1:22 pm

First post

Watched this vvideo on Youtube

And wondered how it works, is it a homemade pressure relief valve on opposite side of the valve to the 'barrel'? Is...

Last post

Sorry, see you found it.

4 Replies

3481 Views

Last post by Ianbuckwell
Fri Jan 02, 2015 9:18 am
Galcon valve

Last post by escorrial

by escorrial » Wed Dec 24, 2014 9:46 am

Hi folks!

Been doing lots of reading on the site and have built three pneumatic cannons so far. Two work great and my coaxial needs a different...

0 Replies

6061 Views

Last post by escorrial
Wed Dec 24, 2014 9:46 am
Spud guns with built in pumps?

Last post by jackssmirkingrevenge
Replies: 3
by Spectrabox » Fri Dec 05, 2014 12:18 pm

First post

I always thought having a spud gun with a built in pump would be pretty cool, endless shots without any need for a bicycle pump or air compressor....

Last post

Here's a nice French project with integrated underbarrel pump.

3 Replies

2848 Views

Last post by jackssmirkingrevenge
Mon Dec 22, 2014 6:54 am
Blow Hard T-Shirt Launcher

Last post by grumpyoldman
Replies: 13
by grumpyoldman » Sun Nov 23, 2014 8:33 pm

First post

I finally finished the first stage design of my t-shirt launcher. It operates at up to 300 PSI with a 10:1 safety factor. Later I will add a homemade...

Last post

Also random question but does it dry fire effectively? It looks like it would need a significant barrel back pressure to compress that spring in...

13 Replies

11171 Views

Last post by grumpyoldman
Sun Dec 21, 2014 4:16 pm
No-seal pneumatic cartridge.

Last post by jackssmirkingrevenge
Replies: 5
by fractal » Fri Nov 07, 2014 4:34 pm

First post

-RED: Seal

-GREEN: Firing pin

-BLACK: Projectile

The bullet seals the barrel. Air can't get behind the bullet and push it down the barrel. When...

Last post

Typically, someone already patented it:

5 Replies

10224 Views

Last post by jackssmirkingrevenge
Sat Dec 20, 2014 10:03 pm
Auto air BB machine gun

Last post by jackssmirkingrevenge
Replies: 6
by Ianbuckwell » Thu Nov 13, 2014 11:01 pm

First post

Came across this by accident, the designer sells the plans for it, anyone have any idea how it works, seems to use a motor and worm drive to control...

Last post

This was the post:

6 Replies

3088 Views

Last post by jackssmirkingrevenge
Sat Dec 20, 2014 10:02 pm
Double barrelled?

Last post by jackssmirkingrevenge
Replies: 2
by Ianbuckwell » Tue Dec 09, 2014 5:59 am

First post

Has anyone considered making a double barrelled spud/airgun? I know it has been done by professionals just wondered if it had crossed anyone's mind?...

Last post

Spudamine made a nice double barreled hybrid a while back

2 Replies

1879 Views

Last post by jackssmirkingrevenge
Sat Dec 20, 2014 9:34 pm
30 Foot Potato Cannon

Last post by TheCannon
Replies: 9
by TheCannon » Mon Dec 08, 2014 11:56 pm

First post

So my physics class is building a potato cannon as a project and I need some advice and help. We have all of the pieces now and all we need to do is...

Last post

Thanks for the info! I had wondered about the barrel being to long and actually slowing down our projectile but I figured that because we had such a...

9 Replies

13449 Views

Last post by TheCannon
Sun Dec 14, 2014 10:46 pm
Accuracy again

Last post by bravootome
Replies: 5
by bravootome » Fri Dec 05, 2014 10:25 am

First post

hello,
maybe someone dig deeper into accuracy and knows more than i do. Again i got accuracy issues, large issues.
TO 7 m i put the bb in same hole...

Last post

I strongly suggest a rifled barrel. Brass/aluminium airsoft barrel will worn out quick if you're using steel bbs.

The barrel is made out of steel....

5 Replies

7766 Views

Last post by bravootome
Thu Dec 11, 2014 1:48 am

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