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

1202170 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

605128 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

858035 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

1021062 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

392692 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

100095 Views

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

Topics

stick's sniper

Last post by kostaki
Replies: 17
by stick » Wed Feb 20, 2008 4:55 am
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my first pneumatic, its more of a rifle than a cannon. cost me around AUS$60 to make. works well at 50psi, but i dont know what type of pvc im using,...

Last post

nice simple and good for a first
17 Replies

5669 Views

Last post by kostaki
Fri Feb 22, 2008 6:43 pm
high pressure burst disk glue?

Last post by Sticky_Tape
Replies: 44
by Sticky_Tape » Sat Feb 16, 2008 5:53 pm
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Hello I am currently back from my trip to the hardware store and I am making a burst disk pnematic and I would like to know is it ok to glue on...

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I am using 3/4 inch poplar dowel for the piston it's nice and light
44 Replies

28463 Views

Last post by Sticky_Tape
Fri Feb 22, 2008 2:17 pm
why the heck doesn't this thing work?

Last post by ghostman01
Replies: 17
by pnematicrookie » Fri Feb 08, 2008 12:04 pm
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after only gettin' to 40psi, you here air from the qev, and when i unhook the air compressor, the air quickly leaves the barrel part of the qev...i...

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hmm ive got to get me one of those qevs would be a nice valve ona sniper of some sort
17 Replies

7304 Views

Last post by ghostman01
Fri Feb 22, 2008 6:33 am
2" porting piston valve

Last post by Launch-Tek
Replies: 3
by Carlman » Mon Feb 18, 2008 9:19 am

First post

Hi all,

Ive decided to make a piston valve because i cant be effed forking out 100 bucks for a 2 solenoid valve :D

I am going to have it as 2...

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A 2 1/2 will have less volume behind the piston to be vented by your pilot valve making it respond a little quicker.

It would also have less volume...

3 Replies

1705 Views

Last post by Launch-Tek
Fri Feb 22, 2008 12:26 am
Opinions on 12v compressors

Last post by POLAND_SPUD
Replies: 32
by lockmanslammin » Mon Feb 18, 2008 1:06 pm
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I'm wondering what you guys think about those 12 volt compressors meant for the cigarette lighter in your car? They all seem to have around a 250PSI...

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those 12V compressors suck... I had one and it broke after about 2 weeks... they get overheated fast, their flow is low, and they have problems when...
32 Replies

13162 Views

Last post by POLAND_SPUD
Thu Feb 21, 2008 5:57 pm
best tank to barrel ratio for nerfs?

Last post by socoj2
Replies: 6
by anrkii » Thu Feb 21, 2008 4:59 am

First post

I did a search, but I could not find any threads about the best chamber to barrel ratio for launching 2 nerf vortex rockets.

my current setup is 70...

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Higher Volume tank. Lower Pressure will help your accuracy with the nerfs..

6 Replies

3502 Views

Last post by socoj2
Thu Feb 21, 2008 5:09 pm
c:b ratio question

Last post by starman
Replies: 4
by Pilgor » Wed Feb 20, 2008 8:17 pm

First post

I did the calculations, I'm not sure if they are right, math is NOT my subject. I want to make sure my rations are right before I build my gun.

I'm...

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do you mean the 4in is your air tank if so then
it is 1.872 so you were pretty close.

Uhhh Bigbob, did you round off some numbers? Using the full...

4 Replies

1318 Views

Last post by starman
Wed Feb 20, 2008 9:18 pm
leaking chamber

Last post by dinsdale
Replies: 6
by jr » Sun Feb 10, 2008 3:26 pm

First post

So we all make mistakes; right! This time i didn't get a complete weld or the fitting was bad!!!! :(

3 end cap, 3 coupler, 3x2 reducer, 2x1...

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i like permatex cold weld compund, it is like jb weld but gets gummy quickly so you can shape it and smooth it so it doesnt look messy, i've fixed a...

6 Replies

2781 Views

Last post by dinsdale
Wed Feb 20, 2008 4:24 pm
strange ideà

Last post by Sticky_Tape
Replies: 48
by SpudFarm » Mon Feb 18, 2008 3:24 pm
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hello!
this is a ideà that fell in my head 10 minutes ago. absolute no time used to think through it.

the picture pretty much explains it all. the...

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It looked weird to me too but I was half asleep :)
48 Replies

15192 Views

Last post by Sticky_Tape
Wed Feb 20, 2008 1:50 pm
[8mm gun] Damage Pics! Finally!

Last post by lockmanslammin
Replies: 11
by Mitchza89 » Tue Feb 19, 2008 5:51 am

First post

Well lads, I thought Id finally post some damage pics of the 8mm The Last Gun

I made myself some nail darts with a string tail, I found this groovy...

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how far away from the target can you be and have the nail remain straight? I assume if it stays straight out to 5 meters it must continue on in a...

11 Replies

3361 Views

Last post by lockmanslammin
Wed Feb 20, 2008 3:45 am
Breech Loader Help

Last post by MrCrowley
Replies: 4
by lockmanslammin » Tue Feb 19, 2008 12:15 pm

First post

I just realised that I'm having to much fun reading and posting questions and answers in the forum and I'm not working on the cannon. :roll:

OK....

Last post

Because your original one wasn't descriptive enough.

4 Replies

1581 Views

Last post by MrCrowley
Wed Feb 20, 2008 3:41 am
My newest valve

Last post by bigbob12345
Replies: 7
by jr » Tue Feb 19, 2008 2:08 am

First post

I know its basic but you asked to see my work!!!!

A screw here....

Blow valve where the silonid was....

And NO epoxy....

EDIT:
This is a...

Last post

I use teflon but ill have to try this retor seal stuff Ive never used any of the pastes.

7 Replies

2293 Views

Last post by bigbob12345
Tue Feb 19, 2008 10:53 pm
optimize my piston. (video)

Last post by Gippeto
Replies: 4
by SpudFarm » Mon Feb 18, 2008 9:35 pm

First post

hey i starting get bored of shooting and no tweaking so i am going to post a bunch of pics and stuff like that to explain all detail of the valve.
so...

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You mentioned that the washer was soldered in place, therefore I assumed it is steel and not forming an air tight seal.

If you have something that...

4 Replies

2152 Views

Last post by Gippeto
Tue Feb 19, 2008 7:48 pm
marble gun help

Last post by Gippeto
Replies: 7
by koolaidman » Mon Feb 18, 2008 2:35 pm

First post

I built this gun yesterday just off the top off my head. Ive already gone through about 3 bike pumps and dont want to mess with compressors of co2,...

Last post

I'll try to help you, but you must list the tools you have access to.

Could you access a lathe anywhere? Drill press? Hand drill? Metal files?...

7 Replies

2426 Views

Last post by Gippeto
Tue Feb 19, 2008 7:35 pm
method of venting the pilot....

Last post by lockmanslammin
Replies: 13
by lockmanslammin » Tue Feb 19, 2008 2:03 am

First post

so guys, I have this gun

...and it seams to me that the thing has a touch more power when I just use the ball valve to exaust the pilot rather...

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Now that I think of it I'm wondering if the lever was what was meant by the fully modified bit
Nope, accually I wasn't even thinking about that...

13 Replies

3656 Views

Last post by lockmanslammin
Tue Feb 19, 2008 11:49 am
Copper chamber question

Last post by Gippeto
Replies: 8
by us sniper » Mon Feb 18, 2008 6:32 pm

First post

How long of a 1 inch chamber do you think I need for a piston gun firing a 7 mm metal ball through a 3' 1/2'' foot barrel? The chamber is type L...

Last post

Wow, you guys like to sweat don't you! :lol:

After crunching numbers for the co-ax I'm building, I came up with a c:b of 0.613:1 (this is the...

8 Replies

2778 Views

Last post by Gippeto
Mon Feb 18, 2008 11:49 pm
Sprinkler Valve?

Last post by sssssbooom
Replies: 13
by sssssbooom » Thu Feb 14, 2008 10:33 pm

First post

Well I am thinking about building a gun that is semi-auto but I am not sure what valve would work best all the guns I have seen that are semi-auto...

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Well I might do that but Im not going to shoot paintballs I will be shooting tennis balls but I will really rethink what I am doing now thanks for...

13 Replies

4780 Views

Last post by sssssbooom
Mon Feb 18, 2008 11:14 pm
A question about safety

Last post by jimmy101
Replies: 19
by lockmanslammin » Thu Feb 14, 2008 1:37 pm
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I was just wondering, the other day as I was poking a projectile down my barrel...
it sure would suck if the gun suddenly went off and shot the...

Last post

Instead of a full bore safety valve you could install a small relief valve between the ammo and main valve. Ram the ammo with the relief open and the...
19 Replies

8576 Views

Last post by jimmy101
Mon Feb 18, 2008 3:47 pm
Shooting Appliances

Last post by c19o
Replies: 17
by c19o » Sun Feb 17, 2008 3:05 am
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Me and a friend shot a microwave and computer monitor today.

Update: Microwave skewered by 5ft long piece of angle iron!

Video:

Pics:

Last post

Ok I measured a piston that was on my desk, got 1.59 sealing face and 1.75 piston diameter. That gave it 1149 ft-lbs with a 1.5kg projectile.

I...
17 Replies

7244 Views

Last post by c19o
Mon Feb 18, 2008 10:13 am
Simple Golfballer

Last post by Carlman
Replies: 29
by frankrede » Mon Feb 04, 2008 12:21 am
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This is a cannon that I built this weekend.
It has a 3 sch-40 chamber with a few barrels to go with it.
It uses a sprinkler valve+valve lid+blowgun....

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Where did you get your GB barrel from

its 1.5 class 200 Sdr-21 pipe.
I got it from a irrigation supply store, its really cheap.
to find a store in...
29 Replies

7491 Views

Last post by Carlman
Mon Feb 18, 2008 8:48 am
Cane Gun

Last post by jackssmirkingrevenge
Replies: 11
by homedepotpro » Mon Feb 18, 2008 12:22 am

First post

This is a quick project i thought up for my four day weekend. i got a shock pump the other day and I've been dieing to use it. The gun has a 1/2''...

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That being the case, are there advantages to having a fairly large chamber? I can see one problem being if you are using PVC, you can't get to the...

11 Replies

10765 Views

Last post by jackssmirkingrevenge
Mon Feb 18, 2008 2:41 am
3/4 Sprinkler Valve Solenoid with remote start HELP NEEDED!

Last post by jackssmirkingrevenge
Replies: 10
by Davidvaini » Fri Feb 15, 2008 10:33 pm

First post

I've been wanting to do this for some time now and Ive seen a post with a remote control car' transmitter and receiver but I want something a little...

Last post

what is the PIR

One of these , very popular with insugent IED techs in Iraq apparently.

10 Replies

5456 Views

Last post by jackssmirkingrevenge
Mon Feb 18, 2008 1:27 am
tri-valve pneumatic

Last post by jackssmirkingrevenge
Replies: 36
by dinsdale » Sat Feb 16, 2008 11:50 am
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I've been toying around with the idea of a new cannon.
I'm thinking about a W shaped compression chamber/base with 3 modded sprinkler valves angled...

Last post

i was going to post pics of my idea but i dont have an image hosting site set up.

You can use the spudfiles uploader

i have an inline abs...
36 Replies

11735 Views

Last post by jackssmirkingrevenge
Mon Feb 18, 2008 1:25 am
KAMG destruction

Last post by bigbob12345
Replies: 16
by bigbob12345 » Sun Feb 17, 2008 8:41 pm
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Okay I went outside today and took a video of the KAMG

I was very impressed with the power.
Here is the youtube vid(I wish I made this before the...

Last post

Still, the 1.2 version of the SCTBDC (160 psi, 1.5 porting, 12' barrel) couldn't fire 1 pound at even 300 fps, and anything much below that is...
16 Replies

4134 Views

Last post by bigbob12345
Sun Feb 17, 2008 11:55 pm
AT-4 TB cannon help

Last post by brogdenlaxmiddie
Replies: 15
by brogdenlaxmiddie » Sun Feb 17, 2008 7:25 pm
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Hey, I built a TB cannon with a mod. sprinkler valve. Its an okay gun but it only shoots a TB about 75ft at 100 PSI. Its a 2.5 chamber and its about...

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any ideas for the upgrades?
15 Replies

3364 Views

Last post by brogdenlaxmiddie
Sun Feb 17, 2008 10:24 pm

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