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

1125057 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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First post

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

552198 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

821156 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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First post

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

967049 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...

Last post

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

374870 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

92397 Views

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

Topics

Help with 3/4in QEV

Last post by jim_himself
Replies: 14
by jim_himself » Tue Sep 21, 2010 7:57 pm

First post

Hello, I've just started my first QEV air gun build and have run into an issue. The threads on my 3/4 to 1/2 (used for making my pilot) to fit into...

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U need to remember my fitting was only in a turn and a half. Also i put the pieces together and put the weld around the edges to make a shell of sorts

14 Replies

4953 Views

Last post by jim_himself
Fri Sep 24, 2010 8:47 pm
QEV Compatibility Question

Last post by ammosmoke
Replies: 4
by ammosmoke » Fri Sep 24, 2010 4:52 pm

First post

Hey all, so I'm considering making a mini to shoot 6mm ball bearings. I have an ASCO 1/8 3 way QEV valve like this one.

I had a design all...

Last post

Oh, so shouldn't be good then? There is about a 1/16th gap all the way around the diaphragm as it is.

EDIT: NVM, I see what you are saying. I just...

4 Replies

2738 Views

Last post by ammosmoke
Fri Sep 24, 2010 7:24 pm
Using a 33g co2 cartridge for a qev airgun?

Last post by spudamine
Replies: 4
by killerbanjo » Thu Sep 23, 2010 5:21 pm

First post

Well a my Dads friend just gave me a load of 33g co2 cartrages that are used in life jackets and wonderd if they would be anygood for use in a 8mm...

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chop it in half, fill the blunt tip with lead and the rest with foam and you have yourself a serious piece of ammo if you can find a barrel it fits...

4 Replies

2879 Views

Last post by spudamine
Fri Sep 24, 2010 12:36 pm
High Pressure - Low Volume Chamber?

Last post by Lockednloaded
Replies: 35
by BeaverRat » Tue Sep 21, 2010 6:22 pm
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Hello,
Here is the setup of my newest cannon:

.80 X 18 chamber (about 9 inches cubed)
.80 X 30 barrel (about 15 inches cubed)
3/4 QEV

Anyway, at...

Last post

PVC distributors that could be used to plumb in the barrel, but you're on your own for the chamber and pilot, I can't think of anything that wouldn't...
35 Replies

8240 Views

Last post by Lockednloaded
Thu Sep 23, 2010 5:08 pm
RR Assisted Bolt Action

Last post by PVC Arsenal 17
Replies: 23
by PVC Arsenal 17 » Thu Jul 22, 2010 10:15 pm
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Copied from my post on NerfHaven:

Here's something I put together over the last few days, still far from finished but as of now it's in a...

Last post

The reasoning behind brightly colored blasters is probably because NERF wars sometimes take place in public places where realistic blasters could...
23 Replies

11173 Views

Last post by PVC Arsenal 17
Thu Sep 23, 2010 2:00 pm
GGDT is Giving me a Headache

Last post by kenbo0422
Replies: 20
by Wali » Tue Jul 13, 2010 7:01 pm
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Ok, I Know that most people who post here are computer literate and I know that I am not so I don't want anyone flaming me for asking stupid...

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Here is a before and after. I loaded the program, put in the parameters, hit calculate and got the graph. I then changed only the barrel length and...
20 Replies

11511 Views

Last post by kenbo0422
Wed Sep 22, 2010 6:53 pm
Calling on the geniouses of valveless...

Last post by POLAND_SPUD
Replies: 5
by Gun Freak » Mon Sep 20, 2010 4:11 pm

First post

How does this look for a valveless gun, it will be blowgun fed from the back with about a foot of 3/4 pvc for the chamber which will be filled with...

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ohh I was thinking about this yesterday but I forgot to post here. yeah 3/8 might be a bit too large. It might not be such a big deal if you used a...

5 Replies

1534 Views

Last post by POLAND_SPUD
Tue Sep 21, 2010 7:40 pm
Running a solenoid valve off wall power

Last post by skyjive
Replies: 5
by skyjive » Mon Sep 20, 2010 9:46 pm

First post

Hi there,

Has anyone had success with running a solenoid-piloted sprinkler valve off of wall power, presumably with the appropriate converter? I...

Last post

wow with amazon link and everything, i really appreciate it

5 Replies

1926 Views

Last post by skyjive
Tue Sep 21, 2010 1:11 am
My A/C Compressor.

Last post by Mpeddlesden
Replies: 6
by Mpeddlesden » Sun Sep 19, 2010 6:44 am

First post

A few week's ago i got this compressor from a Sanyo air conditioner and i have been meaning too work on it i bought a Low Pressure Gauge for it today...

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As Soon as the weather gets warmer ill finish it off and i can finish off Both my gun A Co-axil (like the one in the images) And a copper QEV rifle....

6 Replies

2407 Views

Last post by Mpeddlesden
Mon Sep 20, 2010 12:23 am
Semi auto piston valve concept help

Last post by Major Collins
Replies: 18
by Major Collins » Tue Sep 14, 2010 8:39 am
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OK from other threads on this site , i have heard you can create a semi auto with a piston valve ...correct?

this is done by using a spring behind...

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what should i be working towards now?

i would like a semi auto with a blow gun or any type of trigger mechanism as for i already started making a...
18 Replies

5322 Views

Last post by Major Collins
Sun Sep 19, 2010 6:20 am
O-Ring Deformation

Last post by Technician1002
Replies: 12
by MrCrowley » Sat Sep 18, 2010 7:31 pm

First post

I've built a double o-ringed piston that will be housed in a 2 galv. iron barrel nipple, I need a 100% seal. The barrel nipple I have had a seam, as...

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Glad to help. You can either sand down everything to the bottom of the pits, or use epoxy to paint it and then sand it smooth. Make sure it is oil...

12 Replies

2296 Views

Last post by Technician1002
Sun Sep 19, 2010 12:24 am
New to forums, want to get started right away

Last post by Insomniac
Replies: 8
by jdog234 » Fri Sep 17, 2010 10:40 pm

First post

Hey you spudsters? ha. I'm new to the forum, and I was wondering if I could get some help on a spudgun build. I was thinking of something loud, fun...

Last post

Though provided you've built either type well, they are both very safe.

8 Replies

5725 Views

Last post by Insomniac
Sat Sep 18, 2010 7:21 pm
Piston valve question

Last post by jackssmirkingrevenge
Replies: 13
by Labtecpower » Wed Sep 15, 2010 1:02 pm

First post

I'm currently designing a piston valved BB-musket.
In my garage I had some stuff lying around, wich I think I can use.

I had my doubts about the...

Last post

should I post some close-ups of the guts?

Yes please, maybe I'll regret ordering a lot of 50 schrader valves off ebay :roll:

13 Replies

4258 Views

Last post by jackssmirkingrevenge
Sat Sep 18, 2010 6:40 am
Semi Auto Marble Gun

Last post by clemsonguy1125
Replies: 15
by clemsonguy1125 » Mon Aug 30, 2010 2:56 pm
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Well this is the gun Ive been designing and working on for the couple weeks. Its a basic one inch barrel sealing piston valve with a T Mag Detent. It...

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There are a couple non constant fill semi hammer valves, but the cheapest and easiest thing to do it just hook it up to a compressor.
15 Replies

7655 Views

Last post by clemsonguy1125
Thu Sep 16, 2010 3:29 pm
hubbs piston

Last post by Spudblaster
Replies: 4
by Spudblaster » Fri Sep 10, 2010 6:52 pm

First post

I've been doing lots of research and I have been reading a lot about Hubb's design but can't find the tutorial anywhere, I went to his forum and...

Last post

Thanks for the help guys

4 Replies

1782 Views

Last post by Spudblaster
Sat Sep 11, 2010 11:45 pm
Cant hold alot of psi

Last post by Mr.Sandman
Replies: 4
by RawwR iMa TigeR » Fri Sep 10, 2010 11:53 am

First post

:twisted: I can only hold about 5 to 10 psi can somebody please tell me why.

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I agree with rag, if the original author doesn't give more details of the problem, it is better to let this topic die and rest in it's archival...

4 Replies

1309 Views

Last post by Mr.Sandman
Sat Sep 11, 2010 8:12 pm
pilot volume vs. chamber volume

Last post by cfb_rolley
Replies: 12
by cfb_rolley » Thu Sep 09, 2010 6:39 pm

First post

so im venturing out today to build my first pneumatic, a 40mm barrel sealing piston valve with a 30 mm barrel. i plan to have the barrel half way...

Last post

Have to say I never really modded anything until I became a spudder... Now nothing is safe from my need to mod stuff!

12 Replies

8069 Views

Last post by cfb_rolley
Thu Sep 09, 2010 9:44 pm
Airsoft RPG7: Design Help

Last post by Technician1002
Replies: 4
by T-Bone » Thu Sep 09, 2010 9:19 am

First post

all right, here is my concept and initial design, followed by my questions:

Concept: Bike Pump powered launcher, using 2 nerf footballs as the...

Last post

If it is any help, my Marshmallow Cannon with a tennis ball barrel is easy to pump to 100 PSI with a hand pump. It is able to launch t shirts 200...

4 Replies

2216 Views

Last post by Technician1002
Thu Sep 09, 2010 11:43 am
pressure regulator Q

Last post by c11man
Replies: 12
by wyz2285 » Thu Sep 02, 2010 5:42 am

First post

hi guys,i'm looking for a pressure regulator for my 400 psi air tank. i have bought one but it regulat the pressure by left the over pressure air out...

Last post

the we site for them sucks, i always go to the store becuase in inventory changes like daily and you can negotiate the prices in person

12 Replies

9042 Views

Last post by c11man
Wed Sep 08, 2010 8:44 pm
Will this work or not?

Last post by Technician1002
Replies: 3
by Tobin » Sun Sep 05, 2010 5:07 am

First post

After my first successful gun, I'm on the theoretical stage of a airgun. I want to make a reloading mechanism so i don't have to refill the chamber...

Last post

The gap shown in the video is exaggerated to show there is some coupling between the chamber and pilot area. In real life this has to be extremely...

3 Replies

2092 Views

Last post by Technician1002
Tue Sep 07, 2010 7:27 pm
Semi-New Cannon Platform *UPDATE: New Pics and Paintjob*

Last post by POLAND_SPUD
Replies: 10
by thedeathofall » Wed Dec 30, 2009 1:42 am

First post

Okay well as I told Hubb here , I had a cannon to go along with the barrel...

This one to be exact.

It is based around a 3/4 inch QEV from...

Last post

It's just a blowgun, not a 3 way valve...
but a 3 way valve would be better because it has minimal pilot volume

Qwerty is right, try ebay - there...

10 Replies

7371 Views

Last post by POLAND_SPUD
Tue Sep 07, 2010 4:13 pm
why dose me epoxy leak?

Last post by iknowmy3tables
Replies: 4
by ilovefire » Mon Sep 06, 2010 3:09 am

First post

hey i have been having problems with the epoxy joints leaking on this gun

not sure what i have been doing wrong i have been using 2000psi rated...

Last post

if you're need to stack more epoxy on it's easiest to use something thicker like JBweld or JBweld puddy, I'd put a thick layer of jb weld around that...

4 Replies

1710 Views

Last post by iknowmy3tables
Tue Sep 07, 2010 11:49 am
valve help

Last post by Crna Legija
Replies: 6
by Crna Legija » Mon Sep 06, 2010 4:05 am

First post

Im making a forced blow back canon and would like to have semi/full auto and was think is there a valve that would act like a three way. then with a...

Last post

just downloaded it look pritty cool, thanks :D

6 Replies

1165 Views

Last post by Crna Legija
Tue Sep 07, 2010 8:00 am
Fridge/AC compressors

Last post by c11man
Replies: 5
by Zeus » Sun Sep 05, 2010 8:08 pm

First post

I can obtain quite a number of fridge & A/C compressors, so I have a few
questions about them.

1. Which is better
2. What do you recommend for...

Last post

Thanks for the advice, though I was referring to connecting the compressors being connected in parallel as opposed to series for higher flow instead...

5 Replies

2382 Views

Last post by c11man
Mon Sep 06, 2010 11:51 am
chamber size

Last post by Lockednloaded
Replies: 3
by Spudblaster » Sun Sep 05, 2010 4:51 pm

First post

would a 4 x30 chamber be too big for a bicycle pump? combustion would be too loud for where I want to use these. I intend to attach a 5' tennis ball...

Last post

you could also cut down the chamber by a whole lot and up the pressure, granted you have a setup that could produce high pressure. This gun is a...

3 Replies

1351 Views

Last post by Lockednloaded
Sun Sep 05, 2010 5:18 pm

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