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

1124986 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

552141 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

821128 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

966972 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

374853 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

92390 Views

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

Topics

French Airgun M200.2 //BB's//

Last post by cammyd32
Replies: 23
by driveround3 » Sat Apr 23, 2011 12:47 pm
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Hello everybody, I present you my last creation, more than inspired of the rifle M200 by Cheytac.
Working time: about 25h
Caractéristics:
3.5kg...

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Nice frame+body work you've done on that gun, looks GREAT, did you carve the pistol grip yourself? cos if so amazing work there. If it performs as...
23 Replies

12617 Views

Last post by cammyd32
Tue May 03, 2011 1:15 pm
Airgun legal question

Last post by velocity3x
Replies: 26
by Demon » Sun May 01, 2011 5:25 pm
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I live in Canada, and here airguns need a firearm license if they go over BOTH 500 fps and 5 joules.

The problem is that, after running some numbers...

Last post

I will not shave until I finish this sabot thingy :lol:

Obviously you're Goal Oriented . I completely understand as I do the same thing. :lol:
26 Replies

6002 Views

Last post by velocity3x
Tue May 03, 2011 11:39 am
need help with GGDT

Last post by MrCrowley
Replies: 2
by shiny455 » Mon May 02, 2011 5:51 am

First post

can someone help me work GGDT i understand most of it just not..
Flow Coef, seat diam and friction of projectile.

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For your problems specifically; go to usage and click on Main Window Input .

2 Replies

905 Views

Last post by MrCrowley
Mon May 02, 2011 6:44 am
12" barrel sealing piston

Last post by MrCrowley
Replies: 4
by whoa044 » Sun May 01, 2011 8:26 pm

First post

Now that I have your attention, will there ever be one?
It's piston will be made out of carbon nanotubes I'm guessing :P

Last post

whoa044,

Don't waste my time.

4 Replies

1672 Views

Last post by MrCrowley
Sun May 01, 2011 10:01 pm
3" Barrel Sealing Piston Valve

Last post by mark.f
Replies: 6
by tony48 » Sun May 01, 2011 6:22 pm

First post

This is my first real spud gun (not counting a hairspray combustion and a ball valve pneumatic) and I spent alot of time planning and making it. I...

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Great job swirlface. :lol:

In other news, nice cannon, although you did have me rather excited with the title (3 piston valve), thinking it was...

6 Replies

5243 Views

Last post by mark.f
Sun May 01, 2011 9:31 pm
Help Please: Upgrading My First Cannon to a Piston Valve

Last post by clemsonguy1125
Replies: 28
by pomplemus » Tue Apr 26, 2011 4:41 pm
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Hey everyone, allow me to introduce myself:

I'm Adam, and about a week ago I created my first pneumatic cannon using 3/4 PVC for both the chamber...

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I would add a spring behind the piston along with your other bumpers. I will eliminate the furious pumping needed to seal the piston. Also look again...
28 Replies

9061 Views

Last post by clemsonguy1125
Sun May 01, 2011 10:44 am
first piston valve

Last post by kotabuuki
Replies: 77
by kotabuuki » Sun Apr 10, 2011 7:53 pm
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Hey guys, I'm a senior in high school, and am doing a physics project on how pressure (psi) effects the distance of the projectile. Additionally I...

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I would too, but I don't really have anything to destroy. and also I think I'm different than a lot of the guys on here, because I prefer range over...
77 Replies

21882 Views

Last post by kotabuuki
Fri Apr 29, 2011 6:41 pm
New Coax Design and idea, HELP !

Last post by dewey-1
Replies: 27
by Shrike88 » Tue Apr 19, 2011 11:22 pm
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Ok so I am new to spud files and have been working on a typical COAX pneumatic design with a piston Valve. I am totally dead in the water and need...

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The Piston Fits snug pushing and first inserting it into the rear of the chamber however once inside i would say there is 1-2mm of space around the...
27 Replies

12450 Views

Last post by dewey-1
Fri Apr 29, 2011 12:07 pm
Almost done!

Last post by Jack_Hogg
Replies: 144
by Jack_Hogg » Thu Oct 15, 2009 1:16 am
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I am making a pneumatic airgun for firing marbles. I am busy the last weeks on some things, so I don't have much time to work on my gun.
I am totally...

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20mm
144 Replies

63165 Views

Last post by Jack_Hogg
Fri Apr 29, 2011 5:48 am
Piston getting pulled apart, need advice

Last post by FighterAce
Replies: 15
by FighterAce » Thu Apr 28, 2011 10:20 am
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I recently finished the bolt action mechanism for my new rifle and decided to test fire it... when the pressure got over 10 Bar, the rear of the...

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Schraders have a cracking pressure of around 70 psi... at higher pressure who knows where that number might go... but all in all I'm sure I already...
15 Replies

5143 Views

Last post by FighterAce
Fri Apr 29, 2011 4:12 am
new repeater air rifle

Last post by squidchicken
Replies: 8
by runt1 » Tue Apr 26, 2011 10:29 pm

First post

hi all this is my first post of my new repeater air rifle it shoots 8mm rounds but still need to make a trigger for it cheers

Last post

can you take an overall picture of the gun keen to see the parts

8 Replies

4771 Views

Last post by squidchicken
Fri Apr 29, 2011 1:23 am
My first pneumatic- 3/4" QEV with 5' blow gun barrel

Last post by watcher by night
Replies: 11
by Kanonier » Sun May 02, 2010 8:07 pm

First post

My first pneumatic (completed a year ago)...

Components include:
- 3/4 QEV from McMaster Carr.
- Anderson aluminum camlock barrel coupling (reamed...

Last post

Kanonier,

since you are using the Cold Steel blowgun, if you want to make a pusher sabot for your .625 caliber, it's very easy to do using Cold...

11 Replies

7621 Views

Last post by watcher by night
Fri Apr 29, 2011 1:03 am
Does it matter where valve is placed in over-under?

Last post by Labtecpower
Replies: 13
by Wizman » Sat Apr 23, 2011 5:30 pm

First post

I'm getting ready to build a pneumatic cannon (actually, an antenna/tennis ball launcher using 4 PVC for the chamber and 2.5 PVC for the barrel.

My...

Last post

My 6 liter chamber is a 5 minute workout :D

13 Replies

3729 Views

Last post by Labtecpower
Thu Apr 28, 2011 1:42 am
M107 project

Last post by Crna Legija
Replies: 38
by Demon » Mon Apr 18, 2011 8:12 am
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After finishing my 2meters wingspan rc airplane and not being able to fly it because of the goddamn wind, i am now stuck for two weeks in my other...

Last post

i used epoxy putty it fill in the cracks on my semi. works great and it strong.
38 Replies

10681 Views

Last post by Crna Legija
Wed Apr 27, 2011 10:50 pm
QEV Cannon help.

Last post by clemsonguy1125
Replies: 3
by warhead052 » Wed Apr 27, 2011 7:44 pm

First post

I am going to be making a new qev cannon, and I need some tips. Also I found a fire extinguisher in my road, its debris from a huge tornado that...

Last post

This should help with your searching.

3 Replies

1278 Views

Last post by clemsonguy1125
Wed Apr 27, 2011 8:41 pm
cup piston for a stirrup pump

Last post by CollegeGuy
Replies: 11
by CollegeGuy » Tue Apr 26, 2011 11:44 am

First post

I was making a stirrup pump to finally ramp up pressure in my barrel sealing pneumatic till I realised that I had no access to O rings smaller than 1...

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Yeah but nothing much is different from yours and the one in the video you just have those washers for centering and keeping the rubber washer in...

11 Replies

4786 Views

Last post by CollegeGuy
Wed Apr 27, 2011 1:29 pm
First airgun.

Last post by warhead052
Replies: 18
by warhead052 » Tue Apr 26, 2011 8:21 pm
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Thought you guys might like to see what I have been asking so many questions for...

Sprinkie.

Bolt closed.

Bolt open.

Chamber....

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I am thinking about making a copper version, with a QEV or something, I dunno, havent gotten that far yet....
18 Replies

6613 Views

Last post by warhead052
Wed Apr 27, 2011 1:10 pm
fibreglass resin/Solder? mmm

Last post by Technician1002
Replies: 5
by daniel0663 » Tue Apr 26, 2011 9:15 pm

First post

Hi, guys
I have a Q; Fibreglass resin/solder? which should i use?
I'm planning on building Coaxil and a HP pump out of various copper fittings and...

Last post

One of the problems with using a plastic is the coefficient of expansion is different from the metal. Thermal cycles can stress the bond and cause a...

5 Replies

1528 Views

Last post by Technician1002
Wed Apr 27, 2011 1:59 am
HPA Tank Air Source

Last post by whoa044
Replies: 15
by whoa044 » Thu Apr 21, 2011 6:40 pm
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WARNING
The ASA adapter threads are very close to, but do not perfectly match those of a 1/2 NPT pipe threading. Unless if you are going to epoxy...

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So it looks like you took a remote line ASA adapter, took out the coil, and replaced it with a 1/8npt to a macro line? Amirite?
I'd really have to do...
15 Replies

9708 Views

Last post by whoa044
Wed Apr 27, 2011 12:21 am
Pen gun help.

Last post by MrCrowley
Replies: 5
by warhead052 » Tue Apr 26, 2011 11:22 am

First post

I would like to make my own pneumatic pen gun. What do I need, and how much will it cost me. I am looking for pressure up to around 400psi, but thats...

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We can't tell you what to use because it varies between each design. Meet the four criteria below with materials you find and you can build a pen...

5 Replies

1998 Views

Last post by MrCrowley
Tue Apr 26, 2011 5:22 pm
simple blowgun pistol

Last post by drunpal
Replies: 18
by drunpal » Sat Apr 23, 2011 7:13 am
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Just a simple blowgun pistol, it shoots 6mm bbs and nails wrapped in tape. I use it at 140-200 psi.

Last post

Harbor freight is a good store for finding out if you like a certain type of tool or not. Buy it cheap, let it break, then go buy a higher quality...
18 Replies

5814 Views

Last post by drunpal
Mon Apr 25, 2011 11:35 pm
This is what happens when your piston is too heavy!!!

Last post by Fnord
Replies: 15
by hyperspaz » Tue Apr 19, 2011 10:52 am
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So here's a video of my golf ball cannon firing at 100 psi with a solid epoxy piston:

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Hey, look here; I just had a similar problem.

Take your time with it.
15 Replies

10091 Views

Last post by Fnord
Mon Apr 25, 2011 6:45 pm
Need help with semi auto, with tank.

Last post by ecigar
Replies: 12
by glasklar » Thu Apr 14, 2011 3:06 pm

First post

I'm new to pneumatic guns and just built a very simple before, so this time i where gonna go a bit further and build a semi auto rifle, I don't have...

Last post

Got all, thanks!

12 Replies

3953 Views

Last post by ecigar
Mon Apr 25, 2011 9:06 am
Quick Question

Last post by nadjatee1996
Replies: 10
by nadjatee1996 » Sun Apr 24, 2011 9:24 pm

First post

Whats the best way to create a seal using O-rings? I need 3 seals made using O-ring as pictured below. Please help me JSR XD

Last post

I'll try that nick, and JSR TO THE RESCUE! Wait...washers can make a valve airtight?And I searched Google first XD

10 Replies

4748 Views

Last post by nadjatee1996
Mon Apr 25, 2011 12:09 am
First piston valve (barrel sealing)

Last post by MRR
Replies: 6
by whoa044 » Sun Apr 24, 2011 12:52 am

First post

First off, I'd like to point out I'm aiming for operating pressures of 600-1000psi
I'm not sure whether or not there have been piston valve guns of...

Last post

Since I am the author of the video and have some experience with hot glue pistons, I can say that they are very durable even under high pressure....

6 Replies

3401 Views

Last post by MRR
Sun Apr 24, 2011 7:28 am

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