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

1079612 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

526944 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

620273 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

783333 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

364451 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

88818 Views

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

Topics

200 Pound Farm Cannon

Last post by bigtoolsbigtoys
Replies: 12
by bigtoolsbigtoys » Wed Apr 06, 2016 11:15 pm

First post

Hi Folks,

The Short: I'd love some help with my plans for an 8ft, 3in. piston, all metal pneumatic cannon.

The Long: I've been building guns out of...

Last post

I've been trolling Spud Files since high school and have answered a lot of questions by searching through the forum.

Good luck with your project!...

12 Replies

5803 Views

Last post by bigtoolsbigtoys
Tue Jan 24, 2017 9:23 pm
Semi auto barrel/ loader ideas

Last post by Ragnarok
Replies: 1
by Creator » Mon Jan 16, 2017 9:04 pm

First post

Hey, new member that has been lurking for some time. I have a 1/4 in slide valve/qev combo and was wondering what the best semi auto type loader...

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I'd probably suggest a simple blow-forward bolt, as it's fairly reliable and works well for spherical ammunition like that, although it does increase...

1 Replies

1860 Views

Last post by Ragnarok
Thu Jan 19, 2017 8:43 pm
Improving copper ball valve cannon

Last post by ron_johnson

by ron_johnson » Thu Jan 05, 2017 11:45 pm

My friend and I made a copper ball valve cannon by following a simple tutorial. I can pump mine up to 160 psi with my bike pump, and it's pretty...

0 Replies

20941 Views

Last post by ron_johnson
Thu Jan 05, 2017 11:45 pm
Iron pipe?

Last post by Gippeto
Replies: 12
by potatoflinger » Fri Jun 01, 2007 7:33 pm

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I already made a post about brass pipe, but that was way too expensive for my small wallet, and I saw iron pipe at the store for about eight dollars...

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10 years has to be a record of some sort.....

12 Replies

6310 Views

Last post by Gippeto
Wed Jan 04, 2017 9:03 pm
need help ??????

Last post by Drbean3000
Replies: 7
by abukhansa » Fri Sep 30, 2016 3:48 pm

First post

i built this guy recently for launching out baits
but do not feel it is powerful enough could be that the barrel to chamber ratio is of
chamber is 1...

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I have been able to get to 300 yards with a large ball valve and no extra spring or trigger mechanism. I used a 2 pvc valve and pumped to about...

7 Replies

4005 Views

Last post by Drbean3000
Wed Jan 04, 2017 12:27 pm
Easy Golf Ball Barrel!

Last post by MCRKilljoy

by MCRKilljoy » Sat Dec 24, 2016 12:31 pm

I have noticed that a golf ball fits perfectly in 1.5 EMT conduit from the electrical section of a hardware store. You can use an EMT Compression...

0 Replies

12439 Views

Last post by MCRKilljoy
Sat Dec 24, 2016 12:31 pm
Steel Pipe QEV air gun

Last post by MCRKilljoy
Replies: 2
by MCRKilljoy » Sat Dec 10, 2016 10:04 pm

First post

I built this air gun out of steel pipe. The tank is 1 inch steel pipe, the barrel (not shown) is 1/2 inch copper pipe or 1/2 SCH 80 PVC pipe. The...

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Auxiliary, I used the 1/2 ball valve because I had it lying around. I hold the tank with one hand and pull the valve with the other. The elbow does...

2 Replies

3360 Views

Last post by MCRKilljoy
Wed Dec 14, 2016 6:21 pm
Never Use PVC!

Last post by jimmy101
Replies: 11
by MCRKilljoy » Wed Dec 07, 2016 8:42 pm

First post

Hey guys, PVC Pipe is very dangerous! PVC chambers can explode. PVC is not made for compressed air. So, I used black iron pipe for my pneumatic...

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PVC pipe can hold the pressures used in spudguns, but if the spudgun is bumped or falls over, it can explode with deadly shrapnel. Unless it is a...

11 Replies

6950 Views

Last post by jimmy101
Mon Dec 12, 2016 4:05 pm
Help with a QEV

Last post by jrrdw
Replies: 19
by AircannonSweden » Tue Aug 07, 2012 5:21 am
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I made this QEV yesterday and I can't get this sealing leak-free...what can i use for material? The piston is kinda big but it is still under...

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For some reason people want to build these lately. Looking for better flow perhaps....
19 Replies

9931 Views

Last post by jrrdw
Thu Dec 08, 2016 2:23 pm
a series of questions

Last post by Xamllew
Replies: 1
by [Olive] » Thu Dec 01, 2016 12:22 pm

First post

mostly relating to safety:

i have heard of the safe pressure level for pvc being 100-150psi regardless of vendor-stated rating; is there an...

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Look up Geo Schoonmaker on youtube, he has an airgun that uses a large air chamber that feeds into a smaller one via ball valve for better air...

1 Replies

1808 Views

Last post by Xamllew
Thu Dec 01, 2016 5:53 pm
Help with a powder cannon/pistol

Last post by Lunez

by Lunez » Sat Nov 26, 2016 5:41 pm

Hello, i try to make a small cannon/single shot pistol that i will shoot powder with. I wan't it to be able to make a big cloud, and i wan't it to be...

0 Replies

10632 Views

Last post by Lunez
Sat Nov 26, 2016 5:41 pm
First large air cannon build

Last post by Sear
Replies: 1
by Jaeger6 » Tue Jun 21, 2016 11:10 pm

First post

After seeing airsoft howitzer on YouTube, I couldn't help myself. I'm essentially copying the zeuki1 design, except I am looking to charge the...

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Hi. Maybe your question is no longer valid, but I will answer nevertheless. I'm charging my ATG from scuba tank. You need to use regulator of course....

1 Replies

1482 Views

Last post by Sear
Thu Nov 24, 2016 2:12 pm
Valve flow coefficient question.

Last post by matti
Replies: 3
by Alanstone » Tue Nov 15, 2016 3:30 am

First post

I have a barrel sealing piston of 12mm diameter. When unseated, the CO2 flows into 4 separate 6 mm diameter holes into the barrel. Is it possible for...

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I think CV/efficiency is about the outlet orifice size of the valve so you should know the exact inside diameter of QEV port to calculate the...

3 Replies

4195 Views

Last post by matti
Wed Nov 16, 2016 4:10 pm
Shock Pump Recommendations?

Last post by keks2033
Replies: 4
by Xamllew » Sat Nov 12, 2016 11:43 pm

First post

Hey guys, I'm looking to get a decent shocker, something under $40 and preferably something that can go up to about 400PSI. Anyone know of some good...

Last post

so I pumped pump 45 bar.

4 Replies

3589 Views

Last post by keks2033
Mon Nov 14, 2016 2:43 pm
Why does no one make 12g co2 air guns/cannons?

Last post by biged
Replies: 10
by valin » Sun Jul 17, 2016 11:06 am

First post

Hey guys,

New to all this, but I'm surprised that this isn't a common source of propellant, especially with all of the quick change adapters...

Last post

Decent size spudgun would need one cartridge with every shot..

^^^ This.

Made a chart long ago by unloading an entire 12g CO2 cartridge with the...

10 Replies

11249 Views

Last post by biged
Fri Nov 11, 2016 12:23 pm
Chamber/Piston to Barrel Ratio for Choking?

Last post by jrrdw
Replies: 1
by cowscankill » Wed Nov 09, 2016 1:40 am

First post

Hello hello again, winter is approaching which means it'll be time again for my yearly pneumatic build. This year it's either going to be a big hefty...

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The Basterd was a 2 piston valve with a 1 bore X 8', duel chamber (3 X 5') built in a cross and had no problems dumping both chambers at 100psi....

1 Replies

2054 Views

Last post by jrrdw
Thu Nov 10, 2016 8:13 am
2L Bottle Airgun

Last post by Doctore
Replies: 2
by Doctore » Fri Nov 04, 2016 9:39 am

First post

This is my older gun, but I never filmed it in action so here it is. Very simple as usual, 3/4 inch ball valve and 2L coke bottle as air reservoir. I...

Last post

What pressure is it filled to ?

About 6 bars (90 psi), my pump is old, so it can't handle more. I guess that coke bottle can handle up to 120 psi.

2 Replies

2414 Views

Last post by Doctore
Sat Nov 05, 2016 5:19 pm
Bigfoot (Triggered Ball Valve Cannon)

Last post by auxiliary

by auxiliary » Thu Nov 03, 2016 8:02 pm

Hi Potato Launching Connoisseurs!

This is my latest cannon which is a simple ball valve pneumatic launcher. The most notable features are the ABS...

0 Replies

7758 Views

Last post by auxiliary
Thu Nov 03, 2016 8:02 pm
Nerf Air Compressor Mod

Last post by s_p_a_g_h_e_t_t_i
Replies: 27
by littlebro05 » Thu Apr 01, 2010 5:52 pm
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Hey guys,

Long time no post, since I've recently gotten into nerfing so I've been on forums elsewhere. Anyway I thought this might be something...

Last post

Currently, I am in the process of modding a Longstrike with a small air compressor to give it much longer range, and hopefully much higher accuracy...
27 Replies

16211 Views

Last post by s_p_a_g_h_e_t_t_i
Mon Oct 31, 2016 7:34 am
Arrow gun: Barrel length vs fps question.

Last post by mrfoo
Replies: 18
by Alanstone » Sun Oct 16, 2016 5:02 am
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Greetings spuddy buddies!

I have been designing a pneumatic arrow launcher and have a question I am hoping someone will be willing to answer. The...

Last post

I think what m-c is talking about is having one or several o-rings on the outside of the barrel towards the tail of the arrow, which will avoid air...
18 Replies

14594 Views

Last post by mrfoo
Wed Oct 26, 2016 2:53 am
Piston with off-center barrel?

Last post by jrrdw
Replies: 1
by sharpshooter » Fri Oct 21, 2016 3:39 pm

First post

Has anyone ever built a piston valve with an off-center valve seat? I am going for a twin barrel configuration, and I want them as close together as...

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It will work. The only issue that I foresee is a wear pattern causing a sealing problem once a wear pattern is created.

I'll take 'floating seals'...

1 Replies

1873 Views

Last post by jrrdw
Sat Oct 22, 2016 6:51 am
Plausibility of coaxial cannon

Last post by mark.f
Replies: 3
by lucky_13 » Sun Sep 04, 2016 2:00 pm

First post

Hello, new to the site, but I've built a couple cannons before. Here's one: A breech-loading turret mounted cannon.

Here's my newest project - I...

Last post

The faster you can dump the pilot volume of air, the lower will pressure in pilot be at any given moment and thus a faster moving piston. To dump the...

3 Replies

3383 Views

Last post by mark.f
Thu Oct 20, 2016 7:50 pm
Pneumatic Cannon Design - Could this work?

Last post by mark.f
Replies: 5
by Doctore » Wed Sep 28, 2016 4:32 pm

First post

Hello everyone. This design just popped into my head and I had to draw this.

The design is very simple and self explanatory. It combines principles...

Last post

Another means of pneumatically triggering a dual burst disk design is to over pressurize the region between the two disks (rather than vent it)....

5 Replies

3200 Views

Last post by mark.f
Fri Sep 30, 2016 3:25 pm
B2TB: sawed-off 35 bar repeater

Last post by Brian the brain
Replies: 37
by Brian the brain » Sat Jun 07, 2008 5:27 pm
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B2TB by BTB

Yes, it's finished!!

BAD 2 the Bone ( B2TB for short)

My latest creation..
Just short enough to be called a sawed-off ( kind of my...

Last post

Without this forum I'd never gotten this far. We all feed off each other. But thanks...you have seen this one right?
37 Replies

21438 Views

Last post by Brian the brain
Thu Sep 22, 2016 12:29 pm
CO2 LAUNCHER HELP (Newbie)

Last post by jackssmirkingrevenge
Replies: 3
by Sunshinejack » Sat Sep 10, 2016 12:55 pm

First post

Hello!

So I've never built one of these before but am feeling pretty inspired.

Looking to make something similar to this (scroll to last image):...

Last post

To go to wider diameters you'd need adapters that would lengthen it anyway.

Consider this though, if you shorten the pipe, you will have less...

3 Replies

1814 Views

Last post by jackssmirkingrevenge
Tue Sep 20, 2016 1:04 pm

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