co-axial diaphragm

[McThrust]

i have a question about a co-axial pneamatic im building. im not sure were to put the schrader adapter, i have heard that if u put it behind the diaphragm at the back of the gun then when u disconnect the pump it will fire. does it matter were i stick it? by the way it has a 2" chamber and a ".5 inch barrel.

[SpudStuff]

the piolet and the input valve must be behind the diaphram. put a ball valve between the input valve and the chamber. open it to fill
close to disconnect the air open again to fire

[Flinchy]

why doesn't anyone check the how-to's for these? look at the coaxial valve diagram, its pretty straight forward. but also, you need to pressurize the part opposite the chamber behind the piston, and then you need a pilot valve. when you pressurize that chamber, it will push the valve forward, when you open the pilot valve it will create a vacuum which will pull the piston back and release the rest of the pressure out the barrel. hope this helps

[Benny]

disconecting the shauder valve should not fire the gun unless you have a very small pilot.