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

1201304 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

604772 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

857664 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

1020594 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

392537 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

100024 Views

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

Topics

Manufacturer's valve max. PSI rating vs. actual

Last post by advancedspuds
Replies: 10
by air_dannon » Tue Dec 03, 2013 12:19 pm

First post

Hi,

I've been looking around (again) for a commercial QEV that can handle 400 psi (my attempts to make one have failed too often). This one (I...

Last post

Usually, with a metal valve at least, it's the diaphragm that is rated. I have taken a 3 valve rated for something like 12psi and made a thicker...

10 Replies

4743 Views

Last post by advancedspuds
Fri Dec 06, 2013 11:04 pm
Help with fridge compressor

Last post by Ragnarok
Replies: 10
by zeff » Mon Dec 02, 2013 2:44 am

First post

I just took apart an old fridge to use the compressor for an air compressor. The fridge does not have a capacitor, so i cannot follow similar threads...

Last post

Sounds like it's one of those magic switches .

10 Replies

4359 Views

Last post by Ragnarok
Thu Dec 05, 2013 8:13 am
Piloting a slide valve?

Last post by Ragnarok
Replies: 2
by Pyroteddies » Wed Dec 04, 2013 11:19 pm

First post

First off, to be quite honest every cannon ive made has used a sprinkler valve, i now want to make a gun with a QEV and a slide valve for firing,...

Last post

The slide valve is a manual valve. So no, it's not possible.

QEVs can be triggered by blowguns if desired though... or slide valves can be given...

2 Replies

1526 Views

Last post by Ragnarok
Thu Dec 05, 2013 7:19 am
Semi-auto paintball gun idea?

Last post by Ragnarok
Replies: 3
by Pyroteddies » Tue Dec 03, 2013 11:53 pm

First post

So basically, the gun i want to make is a semi auto paintball gun, i want it to be bolt action, but i need to know how to connect the hopper to the...

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th QEV needs a slide valve which is inconvenient with the way i need to hold it.
By no means. Certainly, a slide valve is one of the better options,...

3 Replies

1820 Views

Last post by Ragnarok
Wed Dec 04, 2013 3:29 pm
First timer with a barrel but no clue what to start with

Last post by Gleedaniel13
Replies: 2
by bigteddy » Mon Dec 02, 2013 1:36 am

First post

Hey guys, I have a stainless steel 2.25 x 3.5' heavy wall pipe that is threaded at one end with 2.5 threads. Its a feed tube from a large centrifuge...

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Large commercially available valves are expensive. One thing you might want to consider is a simple coupling in which you can sandwich a disk of...

2 Replies

1648 Views

Last post by Gleedaniel13
Wed Dec 04, 2013 6:34 am
Chamber to barrel ratio question.

Last post by Ragnarok
Replies: 5
by nortonn » Wed Nov 20, 2013 7:32 am

First post

Hey guys!

Long time lurker, first time poster...

Thanks for all the valuable info guys! Im building my second launcher. its a european QEV piloted...

Last post

The stored energy given by Ragnarok assumes an isothermal process
You're quite right, but it's the only equation I could remember at the time. I've...

5 Replies

1990 Views

Last post by Ragnarok
Mon Dec 02, 2013 6:23 am
ideas on what I could do with this.

Last post by dart guy
Replies: 11
by hawktalk » Sat Nov 23, 2013 10:42 am

First post

reducing tee (640x480).jpg I ordered a reducing tee and they sent the wrong one as they wont refund the return or the price I paid for it, I need to...

Last post

I would probably make it into a loading breech.

11 Replies

3647 Views

Last post by dart guy
Sat Nov 30, 2013 8:53 am
BBMG Questions

Last post by farcticox1
Replies: 10
by 1nxtmonster » Sun Nov 10, 2013 2:22 pm

First post

I was planning on building a cloud bbmg for airsoft. I was going to do a design like this, but in PVC and with a better barrel:

But then I saw...

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After watching the videos, especially the first one, I think my minigun project might be back on. :bounce:

10 Replies

5264 Views

Last post by farcticox1
Thu Nov 28, 2013 6:06 pm
Piston Construction help : bumper, piston &, overall design

Last post by mark.f
Replies: 8
by lazercatz286 » Mon Nov 25, 2013 9:15 pm

First post

Hi guys I'm a new user and I would like some assistance with the construction on my piston and some help with the bumper

1) I'm thinking about...

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Mine's pretty heavy as well, although I was mostly concerned with using jellybean parts without any special tools rather than having a lightweight...

8 Replies

4693 Views

Last post by mark.f
Tue Nov 26, 2013 8:24 pm
Tips on quick exhaust valve (QEV) paintball gun?

Last post by jrrdw
Replies: 5
by AK47 » Mon Nov 18, 2013 9:10 pm

First post

Hey Spudfiles,
I've been making pneumatics for a while, and recently I've been revisiting paintball guns. Keeping in mind that in my area, no...

Last post

Jugs of Truth! Sweet...

5 Replies

4141 Views

Last post by jrrdw
Tue Nov 26, 2013 9:05 am
Dart gun barrel help

Last post by tigerblues28
Replies: 14
by tigerblues28 » Tue Nov 12, 2013 11:40 am

First post

I'm working a new gun, my first QEV with a hammer valve.

Anyways I was looking at a .40 cal smoothbore blow dart gun for a barrel. 36inches to be...

Last post

Yeah I figured that out too. The long skinny darts that came with the blow gun get stuck in a penny, but no penetration yet.

14 Replies

4294 Views

Last post by tigerblues28
Thu Nov 21, 2013 2:09 pm
First Piston airgun and first airgun in a while.

Last post by bravootome
Replies: 15
by turkeypig666 » Tue Oct 01, 2013 5:04 am
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Hey guys, I haven't been here in a while, but anyways. Here is my first piston airgun. I made on before, but it never worked, so I got pissed off at...

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that weldind gas tube you got there in your pictures, i used as an airchamber for my gun. it holds pretty well and look nice.
15 Replies

14647 Views

Last post by bravootome
Thu Nov 21, 2013 4:31 am
200PSI QEV Co2 Rifle, 8mm ID.. Not 100% Finished

Last post by bravootome
Replies: 16
by warez.wally » Wed Sep 25, 2013 11:09 am
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Hello ..
Finished this today its about 4 months in the making.. Combination of laziness and a few issues that came up.

I started off wanting to...

Last post

i seen your penetration tests, i got a 8 mm one and the damages are a lot bigger at same pressure. i think you should use it without a regulator....
16 Replies

12854 Views

Last post by bravootome
Thu Nov 21, 2013 1:49 am
my pvc shoot gun

Last post by bravootome
Replies: 4
by oneocim » Sun Nov 17, 2013 11:03 am

First post

Hi guys, this is my new gun, scaling up from my previous gun. It is 3/4 inch piston inside 1 inch brass T with 1/2 inch seat. The barrel is 1 inch,...

Last post

e. According to GGDT I should be able to plant tree 185 m away.

if so, i should of plant a forest till now,ha. you should use more pressure, like...

4 Replies

4308 Views

Last post by bravootome
Wed Nov 20, 2013 1:39 am
qev proplems ! ANSWER FOUND

Last post by bravootome
Replies: 16
by bravootome » Thu Nov 14, 2013 1:30 pm
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i am working on another qev fully machined so i avoid all those problems i had before, i mean a perfect piston in a perfect body. it is a...

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a good qev like my 8 mm one opens perfectly with the piloting semiauto i got, at every pressure, rather 5 or 30 bar . still if your piston would be...
16 Replies

9585 Views

Last post by bravootome
Sun Nov 17, 2013 1:00 pm
Building a pneumatic multi shot rifle.

Last post by POLAND_SPUD
Replies: 19
by nathan9117 » Thu Sep 05, 2013 6:14 am
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Okay so here is my first proper post on actually making something. I will upload pictures in a couple of hours but I have been awake all night again...

Last post

Talk about... pop music... talk about...

*ahem*
Next time use this for the Ultimate trolling experience ->
19 Replies

12346 Views

Last post by POLAND_SPUD
Sun Nov 17, 2013 10:05 am
My First Piston Air Cannon! - Safety Concerns

Last post by dart guy
Replies: 10
by KurlyQ » Fri Nov 01, 2013 2:53 pm

First post

Hi All! I'm planning on assembling my first piston air cannon very soon. I just had a few safety concerns before I move forward.

My planned layout...

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may i suggest some darts be put into it and fired at a board, it may go all the way through.

10 Replies

4242 Views

Last post by dart guy
Fri Nov 15, 2013 8:27 am
Balanced QDV

Last post by POLAND_SPUD
Replies: 4
by killerbanjo » Tue Nov 12, 2013 10:35 pm

First post

This can be done MUCH more efficiently but the same theory applies. Was checking my laptop and found this pic from a while ago and though I would...

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if what you want is a mechanically triggered spudgun/piston you should focus on an unbalanced QDVs not balanced ones

4 Replies

4168 Views

Last post by POLAND_SPUD
Wed Nov 13, 2013 11:26 am
High pressure compressor

Last post by killerbanjo
Replies: 22
by wyz2285 » Sun Nov 10, 2013 3:59 pm
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Well, my hi-cap gas mags are selling quite well so part of my customers asked if I could charger their paintball tanks.
For both commercial...

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Hey man, would something like this not be easier? The large piston would be better off being almost balanced at first so it allows the front area to...
22 Replies

13009 Views

Last post by killerbanjo
Tue Nov 12, 2013 10:50 pm
coaxial air gun design will it work?

Last post by hawktalk
Replies: 17
by hawktalk » Sun Aug 11, 2013 7:04 am
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I have been thinking about making a airgun/combustion rifle but still cant decide what to do all my attempts making a pneumatic air gun have resulted...

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They will make a grinding cutting noise when being tightened - they do after all work by digging the olive into the copper pipe.

I inspected the...
17 Replies

8839 Views

Last post by hawktalk
Tue Nov 12, 2013 12:30 pm
Reliable pump build!

Last post by andrew67
Replies: 2
by andrew67 » Sat Nov 09, 2013 8:31 am

First post

I'm tired of breaking bicycle pumps!does anyone have a proven method of building a bulletproof hand pump?

Last post

Thanks! I'd forgotten to look in there!

2 Replies

1633 Views

Last post by andrew67
Sat Nov 09, 2013 9:01 am
Barrel Piston attempt with questions

Last post by bravootome
Replies: 30
by air_dannon » Sun Oct 13, 2013 2:55 am
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Working on second gun, in the picture you can see the setup I'm attempting...

I've watched wyz2285's YouTube video on the QEV/piston valve and...

Last post

Working on second gun, in the picture you can see the setup I'm attempting...

I've watched wyz2285's YouTube video on the QEV/piston valve and...
30 Replies

11737 Views

Last post by bravootome
Sat Nov 09, 2013 2:06 am
8 mm multishoot Qev sniper rifle

Last post by bravootome
Replies: 17
by bravootome » Mon Oct 14, 2013 12:44 pm
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Qev 8 mm multishoot sniper rifle. i got some prob with accuracy but its the barrel. when it was new i had pretty good precision like 0.5 cm spread by...

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well, i didn't made the 8 mm gun to shoot for cola cans. it is way to powerfull for that... . it must be pretty good darts if you mention it, does...
17 Replies

9237 Views

Last post by bravootome
Thu Nov 07, 2013 2:06 pm
Hammer valve winchester.

Last post by dart guy
Replies: 19
by s0ka » Tue Oct 22, 2013 6:00 pm
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Hy everyone, i'm from patator forum the french spudgun forum hope you remember me . I'm still making spudguns and i've managed to make one wich works...

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it did take about 2 or 3 shots from like 12 inches but i got it,and i really not sure if i can do it again i haven't played with my blowdarts in a...
19 Replies

14140 Views

Last post by dart guy
Wed Nov 06, 2013 4:29 pm
Something I was thinking about

Last post by Brian the brain
Replies: 11
by Jack_Hogg » Sun Oct 13, 2013 4:31 pm

First post

Hi there,

Its been a while since I've been on here, but there are always those periods I am thinking about a idea. I was wondering if there is a...

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With a captive piston and an arrow i doublt you'll have the recoil you've had with your 40 bar launcher and a solid lead slug...

Because on top of...

11 Replies

5177 Views

Last post by Brian the brain
Wed Nov 06, 2013 1:32 pm

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