Around the beginning of the summer, i decided to start working on a hybrid. Since i didn't want to be restrained by the relatively low pressure tolerances of plastic tubing, i chose to use a 20 oz. cO2 bottle for the chamber. having a minimum rating of 1800 psi makes for a pretty solid gun.
wanting to drill as few holes in the gun as possible, i decided to tap the propane meter into the existing hole in the brass valve at the top of the bottle. (i pump the fuel and the air in through the same hole)
ignition was a problem for some time. i didn't want to have any holes drilled into the chamber, but eventually caved and just tapped a spark plug into the back of the chamber. for an ignition source, i use the electronics from the inside of a PlasmaBall. this works much the same as a stungun, giving me ignition every time without fail.
so far i have not been able to afford a barrel for this gun. i tried to use 3/4 inch cpvc (paintball barrel) but the barrel exploded during a 5x shot
for now, i just use a 12" piece of aluminum tube i found in my garage, unfortunately, this barrel doesn't even start to tap into the potential of the gun.
to date, i've brought the gun up to 15X, using 3 layers of aluminum pop can siding as burst disk, and no projectile
this is a little teaser video until i get my camera back. my fist shot out of the gun. no ammo, just air blast shooting into a hardcover bible. (i'm sorry haha)
soon to come; damage shots, videos
