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

1125168 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

552272 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

821195 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

967095 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

374899 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

92412 Views

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

Topics

site that sells QEV's

Last post by qwerty
Replies: 4
by bighead33 » Sat Apr 03, 2010 10:11 pm

First post

last night i was in Wikipedia's page for spud guns and the first link listed was UK Spud gun Community and they sell both Q.E.V.s and pilot valves....

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I ordered a QEV and other parts from that site and they took 3 months to arrive with losts of hassle involved so i wouldn't advise it. Try something...

4 Replies

1482 Views

Last post by qwerty
Sun Apr 04, 2010 1:45 am
baffles in silencers

Last post by Ragnarok
Replies: 16
by Dixticat » Sat Apr 03, 2010 8:58 am
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Hello, I am coming from a french forum ( ) and I have a question which you could answer better.
I am making a silencer for my 8mm pneumatic canon (I...

Last post

It also means you don't need hearing protection to use it without damaging your ears.
I wouldn't use it as an excuse to not use basic safety gear....
16 Replies

8929 Views

Last post by Ragnarok
Sat Apr 03, 2010 7:49 pm
piston questions

Last post by mark.f
Replies: 9
by gabeb123 » Fri Apr 02, 2010 10:50 am

First post

ok i got 2 questions

1. i want to make a piston valve but i don't have to equipment to machine pvc so i decided i will either make it out of wax or...

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If you're making a 2 piston 1-1/4 PVC SCH-40 fittings fit very well in 2 SCH-40 pipe, and with patience can be made to include O-ring grooves by...

9 Replies

3544 Views

Last post by mark.f
Sat Apr 03, 2010 2:42 pm
Piston valve trouble

Last post by Gun Freak
Replies: 32
by Gun Freak » Wed Mar 31, 2010 8:46 pm
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I finished my first tee piston cannon last night. This morning I tested it. Here's the problem. The piston won't seal, and the air goes out my pilot...

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Yes, I realized that a long time ago.
32 Replies

17732 Views

Last post by Gun Freak
Sat Apr 03, 2010 9:55 am
1inch HPA Piston valve.

Last post by c11man
Replies: 20
by Marffy » Wed Mar 31, 2010 9:10 pm
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I made this earlier today. It is made of black iron pipe. I believe the pipe is rated to 1000psi (correct me if i'm mistaken). I'm wondering if you...

Last post

mcmaster definetl has galvanized rated above 150, not as much but they do have it
20 Replies

6900 Views

Last post by c11man
Sat Apr 03, 2010 7:14 am
Multishot

Last post by Crna Legija
Replies: 8
by GuyFromAvalon » Fri Apr 02, 2010 1:04 pm

First post

Hi Guys,
I#m planning to make a multishot gun.

I have some troubles thinking of a proper design.

So in the picture attached, I have to main...

Last post

this has to be the easyest way to get semi auto its the same as 3way+qev but all ready built you can put this as the reload mech

the nail gun i used...

8 Replies

2804 Views

Last post by Crna Legija
Sat Apr 03, 2010 6:28 am
Hammer valve modeling and a few questions.

Last post by JDP12
Replies: 1
by boyntonstu » Fri Apr 02, 2010 4:19 pm

First post

I am thinking of building hammer valve cannon and I wonder how to model it using GGDT.

How would you arrange a hammer valve using a T?

BTW The...

Last post

Id take a look at some of BTBs creations-- he uses hammer valves at very high pressures.

I saw a picture of a t hammer valve awhile ago, gonna havr...

1 Replies

2847 Views

Last post by JDP12
Fri Apr 02, 2010 4:26 pm
An idea to double or triple pressure.

Last post by inonickname
Replies: 8
by boyntonstu » Thu Apr 01, 2010 10:34 am

First post

You have a 1 diameter steel pump 12 high vertical in a 2 ton hydraulic press connected to you chamber below. Check valve, cut off valve etc.

Fill...

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Good idea, but honestly the hydraulic press you're talking about will probably break. I've heard a lot of stories on a few machinist forums about the...

8 Replies

6185 Views

Last post by inonickname
Fri Apr 02, 2010 11:18 am
Hpa Concept

Last post by POLAND_SPUD
Replies: 7
by velocity3x » Thu Apr 01, 2010 1:24 pm

First post

If this idea has been suggested before, I apologize to the members and the originator.

This drawing is just a quick sketch to illustrate the...

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@-_-
I've seen car engines modded into air compressors but due to the large diameter of the pistons (and even larger area surface) I don't think teh...

7 Replies

1977 Views

Last post by POLAND_SPUD
Thu Apr 01, 2010 9:12 pm
Shock Pumps/ MOAR PRESSURE

Last post by Hawkeye
Replies: 19
by saefroch » Tue Mar 30, 2010 10:05 am
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I have built and am working on a pneumatic cannon with fairly low capabilities, and since it is build from schedule 40 steel and aluminum, I am now...

Last post

Using a bike pump generally quickly blows the hose apart where it exits the pump. The heating of the compressed air at the end of each stroke will...
19 Replies

7061 Views

Last post by Hawkeye
Thu Apr 01, 2010 6:42 pm
Whimpy gun...

Last post by deathbyDWV
Replies: 11
by deathbyDWV » Wed Mar 31, 2010 10:11 pm

First post

I was bored last weekend so I decided to throw together a little gun out of all parts I had around the Garage. (capital G for crowley) this is...

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Thanks. It is fun to show people this. I shoot I and they're like woah you made that? That's really powerful! and then I pull out my big cannon and...

11 Replies

4192 Views

Last post by deathbyDWV
Thu Apr 01, 2010 6:22 pm
Tghhs' ass kicking large bore.

Last post by tghhs
Replies: 14
by tghhs » Wed Jan 27, 2010 7:52 pm

First post

Hey guys with holidays ending tomorrow for me i though now would be a good time to upload my holiday project for all to see and comment.

It's a pn12...

Last post

Hey man. first this is sorta dead but eh i dont care, i'll answere you questions

Yeh it did have a guide rod, it's still in there. I just drilled...

14 Replies

7678 Views

Last post by tghhs
Thu Apr 01, 2010 4:20 am
Spare parts piston valve

Last post by deathbyDWV
Replies: 5
by urgle the danish cow » Wed Mar 31, 2010 6:24 pm

First post

this is my first post and good piston valve so constructive critizism is welcome.
This is made of spare parts after a project with a friend and to...

Last post

Looks good for a just spare parts. Nice work.

5 Replies

1905 Views

Last post by deathbyDWV
Wed Mar 31, 2010 8:25 pm
Help with high pressure cannon

Last post by Patto
Replies: 7
by spudkpi » Tue Mar 30, 2010 5:16 pm

First post

I am in the process of building a co2 regulated gun... I have all the parts to regulate the pressure but have no idea what chamber size to have. I...

Last post

You can take your qev to 500 psi without to
much worry no mod's required ,just don't run unreged c02 (800psi) also with your steel shoot try a...

7 Replies

2386 Views

Last post by Patto
Wed Mar 31, 2010 4:48 pm
Schrader valve attachment- leak?

Last post by saefroch
Replies: 20
by saefroch » Mon Mar 29, 2010 10:22 am
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For quite a while I have been using a very ghetto attachment method to pressurize my pneumatic from a schrader valve- via air compressor or...

Last post

Thanks for the tips, instructions, and demeaning. Seriously, I appreciate negative criticism.

I do appreciate the feedback, but one of the other...
20 Replies

6091 Views

Last post by saefroch
Wed Mar 31, 2010 9:58 am
B.E.A.R. 667

Last post by jackssmirkingrevenge
Replies: 12
by Fish8myb8 » Mon Mar 29, 2010 5:46 pm

First post

You like those cheesy Sci-Fi movies where the bad guy names his devious contraption some corny name? Well... this isn't Sci-Fi but this is pretty...

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Yeah I remember reading a thread saying that lower chamber volume and higher PSI is either better or just as good.

I've posted this in several...

12 Replies

4645 Views

Last post by jackssmirkingrevenge
Wed Mar 31, 2010 12:12 am
size of qev's

Last post by sp1ke
Replies: 8
by sp1ke » Sun Mar 28, 2010 2:14 pm

First post

I am making a break barrel QEV pistol in which the QEV will be housed inside a piece of 1&1/4 PVC to make it look more aesthetically pleasing. the...

Last post

thanks everyone for answering!

i plan to order a 1/4 rectangular qev off of ebay this weekend

tatfree you should just search quick exhaust valve on...

8 Replies

2917 Views

Last post by sp1ke
Tue Mar 30, 2010 8:50 pm
Full Metal Terror

Last post by spudkpi
Replies: 18
by Lockednloaded » Sun Mar 07, 2010 7:54 pm
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...................... Full Metal Terror ......................
This is my first time working with metal, so i decided not to try anything innovative...

Last post

Awesome I would love to see pics. Thanks.
18 Replies

8981 Views

Last post by spudkpi
Tue Mar 30, 2010 5:18 pm
Semi-Auto Shotgun

Last post by Lockednloaded
Replies: 28
by Lockednloaded » Sun Mar 28, 2010 3:33 pm
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This is the same basic design as my earlier semi-auto project witha small twist... Instead of having a large chamber volume, I have compacted this...

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LnL do you say its semi auto because its hooked up to the Co2 or do you get more than one shot per fill in your pvc tank?
in the current setup I can...
28 Replies

14768 Views

Last post by Lockednloaded
Tue Mar 30, 2010 4:49 pm
Special Cartridges/ammunition

Last post by jackssmirkingrevenge
Replies: 8
by GuyFromAvalon » Sat Mar 27, 2010 1:30 pm

First post

Hi Guys,

First, I'm new here and will post pictures and specs of my first pneumatic gun soon.

Meanwhile, I have a question: I'm sure everyone in...

Last post

The reason I never actually completed any of my prototypes was that I never managed to achieve the elusive blowback effect where the cartridge would...

8 Replies

2585 Views

Last post by jackssmirkingrevenge
Tue Mar 30, 2010 12:17 am
Any reason to not go with AN-12 threads over 3/4" NPT ?

Last post by tatfree
Replies: 7
by tatfree » Sun Mar 28, 2010 5:52 pm

First post

Been doing a little research and realize I can use AN-12 threads over and over again and they never wear out when the 3/4 NPT are only good a few...

Last post

Thanks that was exactly what I needed.

7 Replies

2965 Views

Last post by tatfree
Mon Mar 29, 2010 7:44 pm
Were can i find a good/cheapish 3 way valve to pilot my QEV?

Last post by PVC Arsenal 17
Replies: 11
by jhalek90 » Fri Mar 19, 2010 5:04 pm

First post

Today, i realized that there was a pneumatic supply store right in town.
So, needless to say, i asked them if they stock QEVs.

The man on the phone...

Last post

clippard's MJVO-3 valves seem to be pretty good... if you can't find them on ebay I suggest clippard... I've never had one (I can't get them here......

11 Replies

2873 Views

Last post by PVC Arsenal 17
Mon Mar 29, 2010 3:51 pm
Four part question

Last post by grock
Replies: 12
by Dr meat201 » Tue Mar 23, 2010 5:53 pm

First post

Hello all, it's been some time since I have done any work as far as cannons go (once you start, you can never truly stop building them!), but I was...

Last post

ive got one for the rockets. 3oz Dixie cups (small bathroom ones) with 2 pieces of duct tape across the back in a X make a very effective...

12 Replies

4872 Views

Last post by grock
Sun Mar 28, 2010 7:59 pm
Found a $8 digital pressure gauge!

Last post by deathbyDWV
Replies: 2
by Coodude26 » Sat Mar 27, 2010 6:33 pm

First post

EDIT: uhh... van someone help me figure out why my message isn't going through?
EDIT2: Ok, apparantly it has something to do with the html tags...any...

Last post

Looks cool, although I'd guess it isnt near as accurate as they say...

Also the same stuff as crowley says...

2 Replies

1533 Views

Last post by deathbyDWV
Sat Mar 27, 2010 8:27 pm
Paintball SCUBA Ram Air Gas Booster HPA Air Rifle Pump

Last post by POLAND_SPUD
Replies: 2
by boyntonstu » Sat Mar 27, 2010 3:04 pm

First post

Paintball SCUBA Ram Air Gas Booster HPA Air Rifle Pump
Boost 1000-3000psi up to 5000psi to fill your HPA tank

Is it hard to make one to boost...

Last post

not really... but it depends what you understand by 'hard'

you can build your own.. just get a large air cylinder and get a few DCVs to get it to...

2 Replies

2455 Views

Last post by POLAND_SPUD
Sat Mar 27, 2010 4:27 pm

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