oh right, so how do i work out how much psi i need in my chamber if i only know the volume of my combustion chamber and gas chamber? i am using mapp gas. cheers

im moving up in the world, up from hairspray to mapp gas. however i dont understand how to build the fuel metering system properly. if you have the gas conected to a tap with a gauge you will only be able to see how much pressure is in the chamber, not how much fuel is in there? so therefore you hav...

i have decided hybrid is the way i want to go.

as i say, stainless steel would be easier and cheaper for me. however i want to know witch is best and how to do it. i dont want to just build one thats average. i want a beast to be sitting on my shoulder, not a toy. also yes i like the BL series as it doesn't have the combustion chamber sitting un...

hey there, have made a few simple cannons in the past. all combustion. i dont like messing with compressed air as its not very mobile. my last cannon had 3 sparks and was pretty decent, untill i found spudfiles. and now that i have seen the BL series i am keen to build one. having the barrel come ba...