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 66 users online :: 6 registered, 0 hidden and 60 guests

Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Global Moderators
global_moderators.png CS

Another auto reload idea

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: SEAKING9006 » Sat Nov 22, 2008 12:29 pm

As with every piston design, an adequate buffer is required. There are quite a few things you could try using to cushion the piston, just try looking in a lot of the piston gun threads. Much of the stuff you will need for this thing has already been developed, mainly the little details to make this baby sing. Now, I haven't made my own piston yet, so I don't remember any materials off the top of my head.
  • 0

Completed projects:
CA1 SMSS Basic Inline
CA3 PDAB Airburst Cannon

Current Project: Bolt action rifle (25x140mm + 1in shot)

Posts: 734
Joined: Mon Jun 23, 2008 3:20 pm
Location: Texas
Reputation: 0

Unread postAuthor: Gippeto » Sat Nov 22, 2008 1:12 pm

As I see it, the problem is one of surface area.

Your loading piston has too much area for the pressure to act on. Thus it is being slammed open rather forcibly.

If you can reduce the diameter of the bolt by half, you will decrease the surface area by a factor of four. :)

You will be able to use a lighter spring, but you will still need a bumper on both ends to cushion impacts.
  • 0

User avatar
Donating Member
Donating Member
Posts: 2391
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11


Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'