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...

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thank you for creating this website is there anything i can do to help
15 Replies

1125152 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

552257 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

821189 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

967090 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

374894 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

92410 Views

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

Topics

Calculating projectile range

Last post by Ragnarok
Replies: 9
by Matt_NZ » Sat Apr 24, 2010 11:14 pm

First post

Does anyone know what the inputs for this calculator mean?

Does anyone know how to calculate initial velocity and acceleration of gravity (9.82?...

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What I meant was: I've personally never found it easier to write a program for ONE INSTANCE than crunch the numbers for that specific scenario....

9 Replies

4457 Views

Last post by Ragnarok
Sun Apr 25, 2010 7:59 pm
My first Coax

Last post by Hubb
Replies: 17
by Drako155 » Fri Apr 09, 2010 1:45 pm
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I am a new member here and after looking around for a couple of days I found this post which was a question about a design for a coax cannon. I have...

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It's a Bergles. I love Bergles...
17 Replies

5289 Views

Last post by Hubb
Sun Apr 25, 2010 2:30 pm
Shell-loading Airsoft Shotgun Concepts

Last post by Zippster
Replies: 18
by Zippster » Wed Apr 21, 2010 5:20 pm
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My FIRST robotics season just ended, and now I'm itching for a new project. I've always wanted to make a shell-loading airsoft shotgun, and I've been...

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I've been bogged down with heaps of homework and paranoid about the school-wide Nerf assassin game I'm in, so I haven't had much time to devote to...
18 Replies

10586 Views

Last post by Zippster
Sun Apr 25, 2010 2:37 am
Compact Piston Valve

Last post by clemsonguy1125
Replies: 18
by clemsonguy1125 » Sat Apr 24, 2010 7:51 pm
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On a valve like this, does the piston slide in the bushing, or is the bushing cut down and the piston slides in socket itself? My cap piston failed...

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I'll see, does dans piston work like the mauler or gippetos
Edit-Heres what I was thinking of.
18 Replies

4532 Views

Last post by clemsonguy1125
Sat Apr 24, 2010 11:47 pm
2" piston valve porting question

Last post by Gun Freak
Replies: 16
by Gun Freak » Fri Apr 23, 2010 6:03 pm
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I'm building a 2 Tee piston valve for a golf ball gun. I want to put a bushing on the bottom port of the tee to make it detachable incase I want to...

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Well I went to Home Depot and Ace today, but they had no slip by thread tee's or the bushing I needed to I'm ordering online. Anybody ever ordered...
16 Replies

4022 Views

Last post by Gun Freak
Sat Apr 24, 2010 6:56 pm
HP pump connections

Last post by Demon
Replies: 21
by Demon » Fri Apr 23, 2010 3:56 pm
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For my semi-auto carbine, i need to fill its onboard tank to 400 psi
( 1300 psi rated cooper is used for the airtank )

And as i will need to refill...

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Maybe he mean the hose popped out of the fitting

Thanks a lot for your help, especially for the venting part.
21 Replies

4639 Views

Last post by Demon
Sat Apr 24, 2010 7:36 am
finding force using volume and psi HELP!!!

Last post by jimmy101
Replies: 16
by kydavies » Thu Apr 22, 2010 9:17 pm
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how can you find the force in Newtons without using kinematics and only using the size of your air tank and what psi its at?

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1.5 diameter barrel potato mass=.25kg
The mass seems way too high. I would WAG the spud at less than 0.10Kg and perhaps as little as 0.05Kg...
16 Replies

5442 Views

Last post by jimmy101
Fri Apr 23, 2010 11:59 pm
Cap piston questions and build log

Last post by clemsonguy1125
Replies: 50
by clemsonguy1125 » Wed Apr 21, 2010 4:34 pm
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After seeing Gippetos piston valve I decided to make one similair. I bought the tee and bushings but as I started to assemble it I relized that the...

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well i doesnt really matter cause you decided to build it
50 Replies

11044 Views

Last post by clemsonguy1125
Fri Apr 23, 2010 6:28 pm
This piston

Last post by Gun Freak
Replies: 14
by Gun Freak » Tue Apr 20, 2010 5:15 pm

First post

Is this piston's sizes the right way around or should the back be bigger than the front? I'm thinking this could have been the reason for my piston...

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Yes the washer is pretty big. Almost as big as the neoprene.

14 Replies

4558 Views

Last post by Gun Freak
Thu Apr 22, 2010 6:43 pm
Cartridge Loader: Overlap vs. No Overlap

Last post by PVC Arsenal 17
Replies: 11
by PVC Arsenal 17 » Sat Apr 17, 2010 12:13 am

First post

I discussed this briefly not too long ago, but I want some additional input before I go ahead and build anything.

Here's the situation:

I am...

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Well I went with the 50% overlap, out-the-top ejection configuration. No more ejection mechanism, I plan to make use of the spring pressure from the...

11 Replies

2334 Views

Last post by PVC Arsenal 17
Wed Apr 21, 2010 9:02 pm
Homemade DCV

Last post by Gun Freak
Replies: 17
by Gun Freak » Fri Apr 16, 2010 4:00 pm
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I drew this up today... Might make one just because I can't get any DVC's around here. I already know the pilot volume would be kinda big, but that's...

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The o-rings in my original post were on the wooden dowel.

You designs are very interesting... seem pretty easy to make...

So to make it ballanced...
17 Replies

8402 Views

Last post by Gun Freak
Wed Apr 21, 2010 5:01 pm
The Boomstick

Last post by jrrdw
Replies: 1
by AegisAvenger » Wed Apr 21, 2010 4:00 pm

First post

I'm back! And I've been somewhat busy. Today's hurdle is paying bills, which means you get to buy my cannon! Please?

I'm hoping to sell it for at...

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Can't sell a completed cannon from Spudfiles. That was a main rule when we had a classified section for members to use to sell their stuff. That...

1 Replies

1831 Views

Last post by jrrdw
Wed Apr 21, 2010 4:18 pm
Steam Cannon

Last post by iknowmy3tables
Replies: 5
by 12332123 » Fri Apr 16, 2010 6:13 am

First post

I was thinking of making a bursk-disk steam cannon; the design I'm contemplating is to have a sealed chamber of water, which would be heated until it...

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you mean not using the chamber as ground, why? what's the advantage?

5 Replies

2832 Views

Last post by iknowmy3tables
Wed Apr 21, 2010 3:24 pm
Pop off valve and regulator

Last post by Demon
Replies: 18
by Demon » Mon Apr 19, 2010 5:21 pm
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I would like some information about pop off valve, are they simply spring retained pistons that liberate air at a certain set psi?
If yes, how can...

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but I'd recommend buying a flow control valve because they're cheap and adjustable

I can make one myself for approx 1.5$ , so its not a problem...
18 Replies

5129 Views

Last post by Demon
Wed Apr 21, 2010 3:02 pm
Piston Valve Problems

Last post by bobgengeskahn
Replies: 17
by bobgengeskahn » Fri Apr 16, 2010 1:29 am
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Ok, so, I decided to stop lurking and try to build something. I will post pics later in this post (once I get the camera working), but this is the...

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Well, I have some free time this afternoon so I will post an update later if all goes well.

@ Chinnerz, I turned the body of the piston down from a...
17 Replies

5460 Views

Last post by bobgengeskahn
Wed Apr 21, 2010 1:48 pm
stainless steel coaxial pistol

Last post by SP00K
Replies: 11
by jave101 » Fri Apr 16, 2010 11:38 pm

First post

my coaxial pistol gun. uses a carbon fiber piston, welded stainless steel chamber with 1/4 inch stainless steel barrel and pistol air blower as the...

Last post

:shock: Me likeees.

11 Replies

7336 Views

Last post by SP00K
Wed Apr 21, 2010 9:36 am
Piston Valve Launcher Issue

Last post by electrictape22
Replies: 6
by electrictape22 » Sun Apr 18, 2010 11:21 am

First post

Hi spudders, I am currently in the process of finishing up my first piston valve launcher based on the design of mrredrooster (not sure of his...

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I previously had the groove in my piston, but that didn't work. The piston that I'm currently using has no groove.

6 Replies

2120 Views

Last post by electrictape22
Tue Apr 20, 2010 5:46 am
Solenoid Valves

Last post by Technician1002
Replies: 7
by skyjive » Sun Apr 18, 2010 1:09 pm

First post

So I'm thinking of using solenoid actuated sprinkler valves for a particular project in which the flexibility of electrical control outweighs valve...

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If you are running off AC power, you can always use a AC transformer for a sprinkler system.. They have enough ooomph.. :D

7 Replies

2855 Views

Last post by Technician1002
Mon Apr 19, 2010 8:03 pm
Chamber Diameter vs Barrel Diameter

Last post by irisher
Replies: 5
by Gun Freak » Sun Apr 18, 2010 8:59 pm

First post

Ok so me and Clemsonguy are discussing whether a 1.5 gold ball barrel will be choking the flow of a 1.5 chamber. I don't want to downsize the valve...

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gold ball barrel If you can afford to shoot gold balls just buy Larda's cannon :lol:

5 Replies

3271 Views

Last post by irisher
Mon Apr 19, 2010 5:43 pm
3-way valves

Last post by POLAND_SPUD
Replies: 7
by Lockednloaded » Mon Apr 19, 2010 2:37 pm

First post

would these work in conjunction witha QEV or even homemade piston valve for semi-auto capabilities. anyone got any ideas for a loading mech for...

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are you aware of the fact that it is a solenoid valve?? that will make this thing a bit more complicated as you need to build a circuit that will...

7 Replies

2340 Views

Last post by POLAND_SPUD
Mon Apr 19, 2010 3:08 pm
chamber sealing piston without o-rings

Last post by iknowmy3tables
Replies: 3
by Lockednloaded » Sun Apr 18, 2010 11:35 pm

First post

I'm going to dive right into this with no back story about how i figured it out, so here i go...

when you consider a normal barrel sealing...

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the chamber sealing sprinkler valves are the ones with the guide rod.

this isn't exactly a new idea, people have though of it before but there's...

3 Replies

1673 Views

Last post by iknowmy3tables
Mon Apr 19, 2010 7:50 am
Does your T piston valve open completely and stay open?

Last post by Technician1002
Replies: 10
by boyntonstu » Sun Apr 18, 2010 10:59 am

First post

My Trom-Boyn design allows me to fire the chamber without its slip in barrel to allow inspection of the piston after firing.

Ideally, the piston...

Last post

My 2 inch cannon was able to move a tire shop air impact wrench from 3 feet away with no barrel. It slid on the concrete floor for about 3 feet.

10 Replies

9741 Views

Last post by Technician1002
Sun Apr 18, 2010 9:32 pm
Diaphragm thickness

Last post by Gun Freak
Replies: 9
by limbeh » Fri Apr 16, 2010 12:51 am

First post

Thinking of building my own diaphragm valve.

Read up on the spudfiles wiki, and apparently 1/4 neoprene is common.

My problem is this: how much...

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Jack, your diagram is full of DWV :roll:

9 Replies

3178 Views

Last post by Gun Freak
Sun Apr 18, 2010 8:31 pm
piston cannon building troubles

Last post by jrrdw
Replies: 1
by Marffy » Sun Apr 18, 2010 6:59 pm

First post

I just tested my cannon for leaks underwater and it has 3. these three are at the main galv. air tank at the 3 major 2 joints. at the coupler (Both...

Last post

Try to tighten it all up before taking it back apart. You can use a strap wrench on the bigger pipes. Don't have a strap wrench? Use a old leather...

1 Replies

1172 Views

Last post by jrrdw
Sun Apr 18, 2010 7:17 pm
About piston valves

Last post by Technician1002
Replies: 22
by Hubb » Fri Apr 09, 2010 1:49 pm
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Piston valves are always fun to talk about, right? Well, here's a question for us to ponder on:

Everyone says that the actual piston should be a bit...

Last post

The difficulty on getting flat face valves to seal initially so the chamber could be filled is one of the reasons I looked for an alternative.

The...
22 Replies

6864 Views

Last post by Technician1002
Sun Apr 18, 2010 11:19 am

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Pneumatic Cannons

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