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

926870 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

452481 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

467454 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

637584 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

332266 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

80252 Views

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

Topics

12 gram CO2 questions

Last post by kenbo0422
Replies: 14
by metalmeltr » Fri Dec 18, 2009 12:37 pm

First post

How much pressure is contained within a 12 gram c02 canister?

What is the internal volume of a 12 gram co2 canister?

Is there an adapter that can...

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A half inch barrel at 24 inches long will be 4.71 cu. in. It will take about 0.139 grams of CO2 to fill that volume at STP, which will give you about...

14 Replies

11844 Views

Last post by kenbo0422
Tue Dec 22, 2009 7:10 am
Chat request BTB?

Last post by jrrdw
Replies: 2
by boyntonstu » Mon Dec 21, 2009 2:38 pm

First post

OK?

Last post

So safe to lock before it grows to 3 pages...

2 Replies

807 Views

Last post by jrrdw
Mon Dec 21, 2009 3:46 pm
Use of autococker valve for a pilot, weird GGDT valve data

Last post by psycix
Replies: 1
by scianiac » Mon Dec 21, 2009 1:02 am

First post

After looking on ebay for a valve for my airsoft sniper rifle I found this . In function it seems perfect to function in a semi-auto manner but it's...

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If your pilot valve is too small you will also get trouble in practice, not just in GGDT.
Pistons can oscillate or bounce back and forth, an overkill...

1 Replies

2292 Views

Last post by psycix
Mon Dec 21, 2009 9:07 am
Piston Valve Design

Last post by CS
Replies: 3
by electrictape22 » Sun Dec 20, 2009 9:02 am

First post

Hey there, recently built my first pneumatic with a sprinkler valve which is awesome. Now I am making a 2 piston valve gun. I was able to create the...

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Come on, search! Among one of the most discussed issues, this site has more than enough information through the search function.

3 Replies

1569 Views

Last post by CS
Sun Dec 20, 2009 9:59 am
Slide + qev

Last post by airheadnoob
Replies: 16
by airheadnoob » Fri Dec 18, 2009 2:55 am
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btw jsr no feet :wink:

3 days ago i went to the site and ordered a 1/2 QEV and Slide valve.
knowing the delivery system in australia i didn't get my...

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@brad fish its called a slide valve 3/2 way pilot (i think thats what its called) oh and this gun you speak of its not a gun in my mind because i...
16 Replies

8924 Views

Last post by airheadnoob
Sat Dec 19, 2009 6:46 pm
Fist results with the Trom-Boyn

Last post by CpTn_lAw
Replies: 2
by boyntonstu » Fri Dec 18, 2009 10:39 pm

First post

Using 200 psi my new break barrel shot a 10d dart through 3 of phone book and through a 5/8 sheet of plywood behind it.

Audacity from my 1 foot...

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I' d say roughly 650-700 fps according to your file...took 0.0015 second to make 1 foot, ==> ~667 fps.

2 Replies

892 Views

Last post by CpTn_lAw
Sat Dec 19, 2009 4:35 am
Polycarbonate tube for coaxial piston valve construction

Last post by c9d

by c9d » Sat Dec 19, 2009 3:07 am

Has anyone ever used polycarbonate tubing in their construction of coaxial piston valves? Any pros/cons worth noting except for its high price?

0 Replies

2104 Views

Last post by c9d
Sat Dec 19, 2009 3:07 am
L96 coaxal sniper

Last post by bradisfun
Replies: 36
by jamie e » Wed Aug 05, 2009 2:58 am
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This is my first cannon posted, I finished it last week after it sitting in parts in my room for about 3 months.
Spec's
Chamber: 750mm x 30mm...

Last post

AWSOME!!!
yeah thats about it so again AWSOME!!!
but i do think that u could sand down the stock a bit
sorry for kicking the thread up
it's just to...
36 Replies

19711 Views

Last post by bradisfun
Fri Dec 18, 2009 6:13 pm
Help With making a coaxle pistion seal. Update, New pictures

Last post by Jeeperforlife
Replies: 15
by Jeeperforlife » Sat Dec 05, 2009 1:20 pm
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My gun is built, but i can't seem to get the piston to seal. The piston has a 1/8 thick rubber washer for a sealing face glued to the 3 end cap. I am...

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Well I had a set back today. I decided to do a higher pressure shot since my neighbor was at work. I took the gun with the new piston up to 80 PSI....
15 Replies

6438 Views

Last post by Jeeperforlife
Fri Dec 18, 2009 11:17 am
Soldering brass to copper

Last post by metalmeltr
Replies: 5
by elitesniper » Sat Dec 12, 2009 3:02 pm

First post

So im just wondering i have a 1/4 brass nipple and the output of my new air conditioner compressor has a small copper tube sticking out when i slide...

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You should not have any problems. Plumbers solder brass to copper all of the time. Valves that are designed to be soldered to copper pipe have brass...

5 Replies

3238 Views

Last post by metalmeltr
Fri Dec 18, 2009 9:53 am
my new cannon....

Last post by cannon monkey
Replies: 4
by cannon monkey » Wed Dec 16, 2009 4:06 pm

First post

im unsure if it works or not here some videos tell me what you think

the piston that you see out side of the tee is longer i been sanding...

Last post

going out to biopyro i will try editing my videos and giving a better name i just wanted to send them to a friend in a hurry sorry

and to jmadden91...

4 Replies

1653 Views

Last post by cannon monkey
Wed Dec 16, 2009 6:36 pm
what kind off check valve would you use for a pump

Last post by cannon monkey
Replies: 5
by turner » Sat Dec 12, 2009 12:42 am

First post

on mcmaster carr, what kind of check valve would you use for a high pressure pump made of copper?

mabye 7768K11?

Last post

i my self trust things i built more than i would trust somthing produced 100 times or more a day

if it fails and u end up with a new hole in ur body...

5 Replies

2007 Views

Last post by cannon monkey
Wed Dec 16, 2009 11:00 am
Sprinkler Valve Problems

Last post by grock
Replies: 15
by jmadden91 » Mon Nov 09, 2009 7:03 pm
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I am having a problem with my sprinkler valve, It is the first I have modified and it leaks out the barrel pretty rapidly. I have tried Cleaning the...

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sorry for the late reply, havent been around in a while. the guide rod was hollow on mine, i just pressed a drop of hot glue into it, then after it...
15 Replies

4183 Views

Last post by grock
Wed Dec 16, 2009 1:08 am
Max

Last post by McCoytheGreater
Replies: 5
by hunternet93 » Mon Dec 14, 2009 7:22 pm

First post

I'm going to build a whole new gun, the one I have now is impractical for airsoft (too long). I've tested, and 60 PSI is the max I can do without...

Last post

I found one of these at Harbor Freight for relatively cheap. We use it for our large pneumatic gun. It looks like this may be a little more...

5 Replies

2029 Views

Last post by McCoytheGreater
Tue Dec 15, 2009 9:41 pm
Best type of manual pump + barrel diameter for airsoft

Last post by hunternet93
Replies: 5
by hunternet93 » Mon Dec 14, 2009 6:13 pm

First post

I'm trying to build an airsoft mortar/spread launcher. I made a simple pneumatic cannon (2 feet of 2 PVC, tire fill valve, 1/2 ball valve and 1 foot...

Last post

That sounds good. Maybe I'll have money left over after buying Christmas gifts. Thanks!

5 Replies

2185 Views

Last post by hunternet93
Mon Dec 14, 2009 8:52 pm
2 stage trigger semi-auto

Last post by Hubb
Replies: 3
by Demon » Mon Dec 14, 2009 7:49 am

First post

This is just an idea

What if we would be using a two stage trigger to shoot semi-auto ?

i.e.

co2 airtank----co2 regulator----solenoid...

Last post

Could you not just skip the solenoid valve and do the same thing much easier? With a small chamber, it would fill faster than you could pull the...

3 Replies

1028 Views

Last post by Hubb
Mon Dec 14, 2009 9:44 am
Coaxial Not Firing

Last post by Demon
Replies: 5
by FreakyShotGlass » Mon Dec 14, 2009 1:06 am

First post

Its been a while but I decided to finally make another cannon. But I have a problem the piston seals and pressure builds but when it comes time to...

Last post

To make the piston the more leak proof for cheap is to wrap around some very thin tape.

5 Replies

2137 Views

Last post by Demon
Mon Dec 14, 2009 7:38 am
Release valve question

Last post by c9d
Replies: 10
by c9d » Sun Dec 13, 2009 11:21 pm

First post

I was just wondering if this would be a good release valve for a 2 coaxial piston setup?

Last post

@Jack
The thread you provided is interesting. I see how the floating o ring works and it is very similar to the ported piston head on my airsoft...

10 Replies

2002 Views

Last post by c9d
Mon Dec 14, 2009 2:32 am
Super Water Gun

Last post by SEAKING9006
Replies: 13
by grock » Thu Dec 10, 2009 2:37 am

First post

I was thinking of making some kinda of super water cannon, something along the lines of backpack mounted PVC tank > largeish diameter hose > modded...

Last post

VERY close to it. But a bit longer on the beak and it had a barrel shroud. Not to mention an actual 1919/Maxim/M2 type grip+trigger. There was also a...

13 Replies

3837 Views

Last post by SEAKING9006
Sun Dec 13, 2009 9:32 pm
Custom Pressure Regulator

Last post by velocity3x
Replies: 14
by velocity3x » Sun Dec 13, 2009 7:16 am

First post

While building my new cannon, I realized that I must build my own regulator as nothing exists with a high enough flow rate in that pressure output...

Last post

BTW, Didn't we discuss this project earlier? I mean, a couple of months ago?
I remember that someone wanted to build a scaled up paintball gun valve...

14 Replies

2789 Views

Last post by velocity3x
Sun Dec 13, 2009 12:48 pm
Theories on paintball maker efficency?

Last post by al-xg
Replies: 8
by turner » Wed Dec 09, 2009 8:53 pm

First post

Does anyone have and clue of why a paintball maker gets less efficency when dry firing rather than shooting balls? Punkworks did something about the...

Last post

Yeah, dwell is the amount of time the valve takes to open + stays open.
The idea is to keep the valve open only while the projectile is accelerating...

8 Replies

2543 Views

Last post by al-xg
Sun Dec 13, 2009 11:19 am
500psi+ piston valve launcher and 6mm steel coaxial

Last post by Zeus
Replies: 43
by hyldgaard » Sun Apr 20, 2008 6:38 am
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Hello.
I created two threads, one for each launcher, but by mistake they got merged. Sorry for the confusion, but if we try real hard i think we can...

Last post

God bless the backyard of rural australia. I like it dude. Its hot. Nice work.
Hear Hear.
Also hyldgaard, you have the same blowgun as me and I am...
43 Replies

18885 Views

Last post by Zeus
Sun Dec 13, 2009 2:13 am
Semi/Auto QDV idea

Last post by MRR

by MRR » Sat Dec 12, 2009 9:03 am

Recently I watched airsoft videos on YouTube and the blow back mechanism of some guns caught my attention. I googled and after watching some...

0 Replies

2304 Views

Last post by MRR
Sat Dec 12, 2009 9:03 am
pcp airgun regulator

Last post by Demon
Replies: 3
by Demon » Fri Dec 11, 2009 7:56 pm

First post

In this topic, i was told that i needed an air hole to get a pressure reference , but i found a pcp link that tells that there is no need of any kind...

Last post

Also, since you're not using particularly high pressure, why not just buy one? I still happen to have these available

The trick here is that it as...

3 Replies

3869 Views

Last post by Demon
Sat Dec 12, 2009 8:30 am
How can I attach a 12 gra paintball c02 changer to a canon

Last post by csgunner
Replies: 1
by hudd » Thu Dec 10, 2009 9:59 pm

First post

I want to attach a 12 gram changer to a 3 inch chamber. What is the best way to do this? are ther any fittings that would be threaded correctly. It...

Last post

see

problems:
fast release of co2 led to overwhelming of the modded sprinkler valve- corrected bby putting a brass ball valve in front of the...

1 Replies

1306 Views

Last post by csgunner
Fri Dec 11, 2009 12:01 am

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