yeah, for how long?

yeah i do, and i have a 6"x1/2" meter pipe going into a 17x4" chamber, currently i have the pressure set at two shots of 40 psi amd the first time i use it i get a decent launch but as i keep using it, it continues to decrease in power. then i let it rest for a day and its fine again, but i thought ...

hey everyone, i know this might be a bit much to ask for but is anyone willing to help me out if i send them my gun(detachable barrel so not too big) to try and dial in the right amount of pressure for my propane, i just cant seem to get te effeciency down. anyways it would be much appreciated, thanks

ok thank you and do you know what kind of threads a 20 oz paintball co2 cartridge has, or how i could adapt it to a brass pipe thread?

this is just the basic design of the chamber running to the ball valve but its about 12" long and im using 3/4" PVC or if you think i need it i could use metal. any suggestions?[/img]

so ive gotten around to making a pneumatic gun and i was just wondering if i attached a paintball gun c02 cartridge if it would give me enough pressure?

does anyone know how or where i can get a free version of CAD KeyCreator? im tryin to draw up my gun designs. thanks

hey, does anyone know if after combustion there is still propane in the chamber hence the need to ventilate using a fan to get knew oxygen in the chamber?[/list]

thanks everyone i think i got it all set, i sleeved two 2" pipes together and slid it through a 2-1/2" pipe, all i need now is a way to create a seal when the ends of the pipe touch eachother, maybe a rubber washer?

how do i know what kind of screw it is?

alright thanks, any special kind of drill bit cause i tried and only got about half way and it turned red hot and just wouldnt go anywhere

thanks this helps but what end did you drill the hole from? also how do you even drill a hole through a screw

alright thank you

i tried threading a piece of pipe into the barrel but sense i using sdr21 pipe the walls are too thin. but what did you mean by using the hose clamp?

hey guys, so ive developed a breech loading system similar to the kind shown below however i cant seem to figure how to get a rod of some kind like this guy has onto my barrel without it protruding into te inside of the barrel. if anyone has an idea that would be very helpful. thanks http://m.youtub...