Why not pilot and fill with the same valve Because the air behind the piston would not get out fast enough when shooting, resulting in high loss of performance. The part behind the piston should get depressed as fast as possible. Pepressing trough the "loadnozzle" is possible, but will result in gr...

I did water rockets too some while ago. I did a lot of research before i started building. Instead of water, use water and soap mixture. When the rocket is launched, the instant difference in pressure will have the reaction that the soapy water turns into foam, not only the part of the bottle that i...

I have been thinking something like that. When your gun operates at lets say 200 psi, you should have some kind of valve that shuts at 100 psi. That way, only half of the pressurizes air will escape. By the time it escaped, the ammo has been shot out of the barrel. When the valve shuts at a pilot pr...

it aint here

vid please

P.E.D. ??? Man, talk english ..

Been studying long over that, didn't you ?

Brain, the chamber, is it copper to ? 28 mm ?

Just one more question. Why did you use treaded parts ? Isn't soldering stronger ?

And where the hell do you get 23 bar

Very nice "gun". I guess, looking at the building of it, you are not 15 years old. But then again, I already knew that, since you have a 9 years old boy. Very nice job there m8.

nice gun. Very nice arrow thing ammo.

you're welcome

double shot, or both balles at once ?

MAN, take a valium ..... Chill ....

Got some results already ?

it should be heavy and small, looking at the barrel.