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

In total there are 43 users online :: 3 registered, 0 hidden and 40 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Automatic Grenade Launcher (Airsoft/Paintball/Nerf)

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.
Sponsored 
  • Author
    Message

Unread postAuthor: jackssmirkingrevenge » Sat Apr 25, 2009 1:41 am

jonnyboy wrote:Nice idea, although in my mind a semi auto would be more efficient. As far as feeding goes something like a blow forward bolt but with some modification could allow both semi and automatic modes.


With this design, slight pressure on the blowgun should give you a single shot capability.

May want to go larger orifice valve at lower pressure and size the chamber for a positive pressure on projectile exit. To pull it off may require designing and building your own low pressure pop off valve.


Good points, though you can buy adjustable relief valves.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Davidvaini » Mon Apr 27, 2009 11:53 pm

Technician1002 wrote:
Davidvaini wrote:I would be using it relatively lower pressures. I think around 120 psi if not a little less.



Those plastic balls may collapse at 120 PSI with a fast valve. May want to go larger orifice valve at lower pressure and size the chamber for a positive pressure on projectile exit. To pull it off may require designing and building your own low pressure pop off valve.


they are not plastic, the ones I'm using are foam.

As far as the hopup is concerned it will help on keeping the projectile stable and far more accurate. I used the same nerf balls in this video:

http://www.youtube.com/watch?v=ZbRLW4YP ... annel_page
  • 0

User avatar
Davidvaini
Major General
Major General
 
Posts: 1315
Joined: Tue May 29, 2007 8:58 pm
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'