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

915467 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

448491 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...

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great job everyone
64 Replies

420934 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

626101 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

330414 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

79428 Views

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

Topics

Pop Off Valve McMaster-Carr 50265K23

Last post by dewey-1
Replies: 6
by dewey-1 » Thu Jul 23, 2009 9:20 am

First post

I recently purchased several of these pop-off valves from McMaster.
Their part number is 50265K23 and priced at $4.12 USD

The valve is made by...

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I am curious to find out the duration time of the pop off.
In other words the open time from pressure relief to closure.

It depends entirely on the...

6 Replies

5333 Views

Last post by dewey-1
Mon Jul 27, 2009 10:48 am
The détruisezier

Last post by inonickname
Replies: 32
by inonickname » Sat Jul 18, 2009 1:56 am
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It's complete :twisted: the 400 psi, 15.5mm rifled erm..gun.

Barrel: 15.5mm x 1.2m, 1:30 rifling (ammo; wadded marbles)
Chamber: 15.5mm x 80cm...

Last post

Update:

She has a stock now, modeled after this one.

It's not quite as aggressively curvy, but works well.

We go to get the lathe on...
32 Replies

11208 Views

Last post by inonickname
Mon Jul 27, 2009 5:18 am
Cheap Fridge Compressors!

Last post by Technician1002
Replies: 10
by jmadden91 » Mon Jul 27, 2009 3:08 am

First post

Just been browsing Ebay and came across this, Fridge compressors for $9.99 american. Maybe a good alternative if you cant find an old fridge laying...

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hahahah thats sick.

@technician: Whoops sorry dont know what that is. Well a mod should delete this then lol

For those who don't know. US home...

10 Replies

2499 Views

Last post by Technician1002
Mon Jul 27, 2009 4:23 am
home made air gun (full metall)

Last post by Brian the brain
Replies: 36
by A.p.P.o.0.w.W » Thu Jul 31, 2008 3:03 pm
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hey

i'm new here,

and i liked it to show my home made air rifle.

its made off full metall.

the air camber can take like 400psi

but my pump is...

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I'm from The Netherlands and I've put 900 psi on QEV's without failure...

But what do I know?
36 Replies

20313 Views

Last post by Brian the brain
Sun Jul 26, 2009 4:24 pm
please help me making a pneumatic cannon (noob here)

Last post by eggbom
Replies: 17
by eggbom » Thu Jul 23, 2009 10:06 am
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hello,

i just wanna make a 'basic' pneumatic cannon with all metal stuff.
but the problem is that this is my first build.
and i dont know if it's...

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i used metal parts because it fit's by my wooden gun i've made (that's my work, make wooden stuff)

but first i must paint it or something, then i...
17 Replies

5141 Views

Last post by eggbom
Sun Jul 26, 2009 12:28 pm
first attemp at pneumatic cannon>>>swooshhhhhh

Last post by jackssmirkingrevenge
Replies: 58
by FORE!!!! » Sat Jul 11, 2009 7:30 am
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well here she is my first pnumatic cannon

im using basic pvc pressure pipe with a very loose ball vavle,i didnt have the time to look for a modded...

Last post

About chamber size, some practical examples of a launcher modelled close to yours.

Starting with a 10 inch chamber, you get a muzzle energy of 37.2...
58 Replies

15747 Views

Last post by jackssmirkingrevenge
Sun Jul 26, 2009 3:02 am
Chamber:Barrel and GGDT?

Last post by D_Hall
Replies: 26
by SpudJoe » Fri Jul 24, 2009 4:28 pm
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Two questions:
How important is chamber to barrel ratio in pneumatics? We're working on a new gun, in total the chamber is about 312 inches of 3 PVC....

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So was the guy at spudtech just BSing when he claimed he broke the sound barrier with this gun?
In a word... Yes.

When pushed for his muzzle...
26 Replies

6070 Views

Last post by D_Hall
Sat Jul 25, 2009 8:51 pm
questions about barrel sealing tee piston valve

Last post by Technician1002
Replies: 5
by geniusbomberman » Fri Jul 24, 2009 11:35 pm

First post

I plan on making a piston valve based on the one at . would the air source(a bike pump in my case) go on the side of the tee labeled pilot? and...

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If I add an equalization hole, on what part of the piston should it be, and how big should it be?

In a nutshell EQ hole should be very small. The...

5 Replies

2312 Views

Last post by Technician1002
Sat Jul 25, 2009 1:36 pm
4 Inch Piston Valve Cannon with Video and many Pictures

Last post by glass_05
Replies: 17
by glass_05 » Sun Jul 19, 2009 11:43 pm
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Gun Type: Barrel Sealer
Piston: Housed in a 4 inch tee.
Chamber: 4 ft x 4 in
Barrel: 7 ft x 3 in and 5 ft x 2.5 in
Exhaust: 1 inch modified sprinkler...

Last post

The other day when playing with GGDT a little bit I came across that, and I figured that is what it was asking for.
17 Replies

9814 Views

Last post by glass_05
Sat Jul 25, 2009 12:12 pm
my first p-gun

Last post by theBOOM
Replies: 4
by tombd1 » Sat Jul 25, 2009 2:01 am

First post

my first attempt at a pneumatic gun here. i know that the sprinkler valve is not an optimal valve, but it failed to feed my sprinkler heads in my...

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Hm id improvise if you have any of those chairs that are used like openable... their legs open and close back...might be easy to make a bipod outta...

4 Replies

1389 Views

Last post by theBOOM
Sat Jul 25, 2009 2:39 am
sights

Last post by cdheller
Replies: 4
by colty-bear » Wed Jul 22, 2009 10:09 pm

First post

i am putting a scope on a 5/8 copper pipe and i need to know will this fit on tight or is it to big?

here is what im looking at

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from a surefire website.

Mount — Clamps to rifle/carbine barrel or gas tubes from .5 to .9 in diameter
5/8 is in that range.
your problem is in...

4 Replies

1818 Views

Last post by cdheller
Fri Jul 24, 2009 10:35 pm
Help designing piston valve

Last post by Technician1002
Replies: 8
by bl74 » Fri Jul 24, 2009 2:49 pm

First post

Hi im planning on making a gun with a piston valve soon. My first pneumatic was a dual 1 sprinkler valve setup but it leaks and doesnt fill up...

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I though I would toss in a little of what to expect. I had an orange go bad, so I disposed of it by recycling it into a fine mist for the garden. As...

8 Replies

2657 Views

Last post by Technician1002
Fri Jul 24, 2009 6:16 pm
gas nozzle idea

Last post by boom shtick
Replies: 9
by boom shtick » Thu Jul 23, 2009 2:34 pm

First post

hey
I was in a hard ware type store a bit a go and I saw some gas nozzles. When I looked closer I Saw inside the tube a piston-like valve and I...

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Commercial ones have a vapor recovery vent in the USA to reduce VOC emissions.
That's a state/local reg, not a national one. In Indiana the pumps...

9 Replies

1796 Views

Last post by boom shtick
Fri Jul 24, 2009 12:31 pm
How o you make a cup piston sealer rubber/washer?

Last post by jeepkahn
Replies: 8
by boyntonstu » Thu Jul 23, 2009 5:17 pm

First post

I want to make a 3/4 cup seal similar to the seal on a bicycle pump piston.

Hints and suggestions appreciated.

BoyntonStu

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Thicker is better, if the rubber is too thin it will try to fold instead of flexing to the cup shape... if you use thin rubber you will prolly need...

8 Replies

2380 Views

Last post by jeepkahn
Fri Jul 24, 2009 10:49 am
gas system for semi auto

Last post by THUNDERLORD
Replies: 14
by geardog32 » Fri Jul 17, 2009 12:23 am

First post

i have been cruising around the spud files for a little while now and i have seen some semi auto guns but not many closed bolt type. i was just...

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Interesting reads from replies here!!!
I've been working like crazy lately :)
so not much time to study them all fully now. :(

This part though:...

14 Replies

5438 Views

Last post by THUNDERLORD
Thu Jul 23, 2009 11:15 pm
shooping :D

Last post by jrrdw
Replies: 20
by cannon monkey » Wed Jul 22, 2009 9:27 pm
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umm ya where do u buy seal face rubber...what it called i used bike tire for my mini 3/8 inch piston but this is bigger...where do i look ( in tampa...

Last post

Anymore discussion of grammar in this thread I will lock it. Get back on topic.
20 Replies

6589 Views

Last post by jrrdw
Thu Jul 23, 2009 7:12 pm
Help-Pneumatic Valve

Last post by Dreydor
Replies: 10
by Dreydor » Thu Jul 23, 2009 12:27 pm

First post

First of, i would like to say that i searched the forum and i looked at the basic help on this subject, but my valve is still not working. I am using...

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Ok, so i will remove the filter from my orbit cuz maybe its leaking ther

10 Replies

1574 Views

Last post by Dreydor
Thu Jul 23, 2009 5:24 pm
Suspension Shock Pump.

Last post by jeepkahn
Replies: 4
by neeewwww » Thu Jul 23, 2009 9:49 am

First post

I got some problems to fill up my 1.3L chamber to about 250psi. I bought a cheap deutch floor pump and it failed at 100psi, and now, I can´t even...

Last post

Zefal makes several that are 230+ rated...

4 Replies

1957 Views

Last post by jeepkahn
Thu Jul 23, 2009 12:14 pm
Achieving consistent muzzle velocities

Last post by PVC Arsenal 17
Replies: 41
by btrettel » Wed Jul 08, 2009 7:48 am
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Does anyone here have any specific tips for improving the consistency of muzzle velocity for a pneumatic? I did some tests a few days ago with the...

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The Clippard definitely opens faster and dumps more air.
Not to be pedantic (well, actually, I am being pedantic), but I'd be a little surprised if...
41 Replies

9979 Views

Last post by PVC Arsenal 17
Wed Jul 22, 2009 7:01 pm
HEAL 320psi 20mm copper cannon (now with damage videos)

Last post by Ragnarok
Replies: 163
by Ragnarok » Thu Nov 01, 2007 10:58 am
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This is H.E.A.L. , or usually, just HEAL without the periods.
HEAL is simply an acronym of the words High Efficiency Air Launcher .

More...

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There's a lot of that going on. There are things I've written for the Spudwiki that I know seldom get linked to (forum etiquette and rules stuff...
163 Replies

62123 Views

Last post by Ragnarok
Wed Jul 22, 2009 6:24 pm
bike pump maintenance

Last post by ralphd
Replies: 9
by geardog32 » Tue Jul 21, 2009 10:40 pm

First post

this may be a dumb question but is there anything i can/should do to keep my manual track pump going strong? like should i give it a spray of wd40? i...

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What I wanted to know is; are they better than regular bike pumps such as the ones at Walmart..ex. bell

9 Replies

3034 Views

Last post by ralphd
Wed Jul 22, 2009 9:16 am
Semi-Auto Barrel Sealing Piston Valve?

Last post by inonickname
Replies: 2
by spudkilla224 » Wed Jul 22, 2009 8:40 am

First post

Hello everyone, I'm in the process of designing a Semi-Auto Barrel Sealing Piston Valve. And I was wondering if it would even be possible? And if...

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Yep, nothin to it. For example I can leave my rifle hooked up to an airline and fire semi automatic (as fast as the chamber can fill).

2 Replies

845 Views

Last post by inonickname
Wed Jul 22, 2009 9:06 am
Piston valve tennis ball cannon Help!

Last post by jackssmirkingrevenge
Replies: 8
by Chornbeak » Tue Jul 21, 2009 7:12 pm

First post

Well I've been in the process of planning/ building a fairly compact tennis ball cannon with a 4 chamber. Under-over config. I have run into the...

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Is there still a big advantage from a 1 sprinkler valve to 1.5 port piston valve? Or would that not make too much of a difference?

It would make a...

8 Replies

4439 Views

Last post by jackssmirkingrevenge
Wed Jul 22, 2009 12:07 am
I HAZ SOS!!! lolcat referance...

Last post by jeepkahn
Replies: 42
by jeepkahn » Tue Jul 14, 2009 9:07 am
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No, I don't have any pics of the chrony read, and conditions may or may not have affected the local SOS, but there was a significantly differant...

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Here I go trying to burst my own bubble, but isn't the Cd of a smooth sphere lower at higher velocities or am I confusing Cd with actual drag???
No,...
42 Replies

9148 Views

Last post by jeepkahn
Tue Jul 21, 2009 11:24 am
barrel sealing piston valve vs QEV

Last post by cannon monkey
Replies: 5
by cannon monkey » Mon Jul 20, 2009 8:46 pm

First post

whats the differnce between the two
basicly
is a piston free moving and QEV the same thing but a spring pushing it up to seal?

Last post

alright whats good for a bumper i been noticing the bottom of my piston is flaring out from slaming into the side of the tee fitting i only got some...

5 Replies

1902 Views

Last post by cannon monkey
Tue Jul 21, 2009 8:46 am

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