SpudFiles

No, look at diagram 1 at http://www.spudfiles.com/forums/piston ... 57 .html . In that, wouldn't the air in the chamber push back the piston?

P.S. I'm a blue star! Ya!

no there is air behind the piston holding it back then you takes the air behind it away and the air from the chamber pushes it back and there is a open path to the barrel

There is a sortof a echo in here here here.

oooooooohhhhhhhh.... Now I understand... That will open new ideas for future cannons

when you first get it you feel dumb that you don't understanded it before

lol so true