Login    Register
User Information
We are a free and open
community, all are welcome.
Click here to Register
Who is online

In total there are 44 users online :: 3 registered, 0 hidden and 41 guests

Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot] based on users active over the past 5 minutes

The Team
Global Moderators
global_moderators.png CS

Newbie seeking intro to pneumatics

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
  • Author

Unread postAuthor: MrCrowley » Sat Apr 26, 2008 9:24 pm

Yup, that's pretty much it.
  • 0

User avatar
Posts: 10209
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 6

Unread postAuthor: Deli » Sat Apr 26, 2008 9:43 pm

I have a feeling I won't be satisfied if I don't make a piston, even if my first try isn't up to par.

EDIT: I added a pic of a simple design of a piston, which I don't see too much difficulty in making.
  • 0

My design
gun.png (28.27 KiB) Viewed 316 times

Posts: 18
Joined: Sat Apr 26, 2008 7:29 pm
Reputation: 0

Unread postAuthor: clide » Sun Apr 27, 2008 1:46 am

That is known as a chamber sealing valve. It will require an o-ring on the piston to seal properly. Otherwise air will leak from the exhaust area (pilot) into the barrel.

Barrel sealing valves don't require o-rings so they are typically preferred by new builders.

This may help if you haven't seen it yet
http://www.spudfiles.com/forums/piston- ... t8157.html
  • 0

<a href="http://gbcannon.com" target="_blank"><img src="http://gbcannon.com/pics/misc/pixel.png" border="0"></a>latest update - debut of the cardapult

Donating Member
Donating Member
Posts: 785
Joined: Sun Mar 06, 2005 3:06 am
Location: Oklahoma, USA
Reputation: 0

Unread postAuthor: jimmy101 » Sun Apr 27, 2008 3:15 pm

You might take a look at this <a href="http://members.aol.com/sph911/spud/sniper.html">sprinkler valved sniper</a> for more ideas. You can omit the breech loading mechanism to start with. It can be added later. Similarly, it can be electricaly fired to start with and then mod'd to a blowgun trigger if you want better performance.

For a small bore (up to perhaps 1" diameter) gun you can use a bike pump (or shock pump) to pump it up. It's good excercise. :?
Ammo is cheap for small bore barrels since spuds etc will work.

For the gun linked above it is easy to swap the barrels. A 1"er for spud like stuff, a different barrel for paintballs, or AA or C batteries ....
  • 0


Lieutenant General
Lieutenant General
Posts: 3160
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 14


Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot]

Reputation System ©'