keks2033 wrote:Jack, this scheme will not be more effective? The piston in the bypass is smaller than the volume in the drummer.
Interesting! My plan is to test it with the barrel bolt only first to see if I can get it to work like that, if not a secondary pistol will be added.
Why is the bronze pipe used to shoot normally used? Or is it exclusively built for that weapon?
Do you mean the barrel? It's a KS part, they have a huge choice: http://www.ksmetals.com/26.html
Poppet valve done in the meantime and after tweaking the valve seat everything sealed well at 850 psi:
If you look closely at the valve stem there is a groove that connects to a hole in the center of the body, in order to avoid the valve being slammed open by the chamber pressure as soon as it cracks and dumping the chamber.
That was an excuse to have a bit of fun using a brass bar dropped by gravity as a hammer and the barrel tube held in the breech attachment:
The #4 birdshot easily went through the bottom of a soup tin at close range which is about the performance I wanted for a plinker