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

907630 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

443094 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

391936 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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First post

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

619616 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...

Last post

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

329100 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

78739 Views

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

Topics

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...

Last post

Thank you.

4 Replies

3001 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...

Last post

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

1790 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

2442 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

3442 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

6787 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

3366 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.

Last post

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

3500 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

6528 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

4124 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...

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. 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

3804 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

2726 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

2449 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...

Last post

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

The projectile is...

3 Replies

2136 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

2570 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

5876 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

2720 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

10255 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

8882 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

3027 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

1609 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

11997 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

3653 Views

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

Last post by wegz15
Replies: 4
by wegz15 » Fri Dec 05, 2014 10:18 pm

First post

First time posting. Can't figure this out. All the stuff I've been reading says to use pressure rated pvc. Pressure rated fittings will read NSF-PW...

Last post

No. I was going to head back to Lowe's and check the ratings on those. I also thought of switching from 3 to multiple 2

4 Replies

1886 Views

Last post by wegz15
Sun Dec 07, 2014 1:24 pm
qev valve setup

Last post by twessel
Replies: 4
by twessel » Wed Dec 03, 2014 4:39 pm

First post

Need some help to make this qev work. What's wrong with my.setup?

Last post

Yes. The back air line is active air pressure. It's a needle valve which is letting a small amount of air fill. About one shot a second.The small...

4 Replies

1769 Views

Last post by twessel
Sun Dec 07, 2014 12:59 am
Regulators

Last post by ninjamonkey127
Replies: 9
by ninjamonkey127 » Wed Dec 03, 2014 3:50 pm

First post

Hello everyone! I have been building a pneumatic coaxial rifle and i'm wanting to get a 3000psi HPA tank, found one for pretty cheap on amazon. I'm...

Last post

I don't think that calculator has do with pvc air guns. They want me to enter a psi reading for my air gun 500psi or more. I only plan on putting 60...

9 Replies

3628 Views

Last post by ninjamonkey127
Sat Dec 06, 2014 3:49 pm

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