First thing.... be VERY careful what arrows you use.... CF arrows are NOT designed for internal pressure, so if you are thinking of sliding them over a thin "barrel" use aluminum.... I wouldn't want to see one explode and drive CF splinters through your hand....As far as the airflow, there is a valve opened momentarily by a sliding hammer strike, and the hammer is released by the trigger.... The hammer is powered by compressing a spring.... Look at a parts diagram for a Discovery and you will see how it works.... I would suggest you start with an existing, SAFE design, HPA is not something to play around with if you don't know what you are doing....Bob
In the type 2, Said arrow has a small sealing piston or ring in place of the Nock ... a Guide ring or fingers to hold it centered at muzzle one place down the I.D. of a big bore barrel.This configuration operates like a conventional PCP in that Valve to projectile distance before firing is very short and of small volume. Now upon shooting arrow it is propelled similar to a pellet or bullet and can have much increased efficiency in using the pressure & volume of air released to generate velocity & power to the arrow.
Quote from: Motorhead on January 28, 2017, 02:34:18 PMIn the type 2, Said arrow has a small sealing piston or ring in place of the Nock ... a Guide ring or fingers to hold it centered at muzzle one place down the I.D. of a big bore barrel.This configuration operates like a conventional PCP in that Valve to projectile distance before firing is very short and of small volume. Now upon shooting arrow it is propelled similar to a pellet or bullet and can have much increased efficiency in using the pressure & volume of air released to generate velocity & power to the arrow.Forgive me if I misread, but it sounds like you're talking about how the arrow is positioned on the tube/barrel. If that's the case I was planning on making the arrow slide onto the barrel easily but near the back of it, where the arrow would stop, would be a thicker piece of metal. This would allow it to be seated firmly and stay in place. So that only the release of air shoots it forward. Again, I could be wrong with how I read that.