doesn't the propane meter have to be equal to or smaller than the volume of propane going into the chamber because it would be lower than atmospheric pressure if it wasn't? not to start of on a bad note Thanks everyone for the great posts, helped me not destroy my future spudding career, although i ...

OK, DYI, I apologize for my ignorance and everything but that last post just threw me off quite a bit. 1) Could you re-explain the equation (including reasons) for the .533 psi of propane per "x". I understand the math involved, but I don't understand why, most likely a problem in the understanding ...

Not to be mean but seeing as how this is the hybrid cannon forums, i insinuated that everyone knew it would be a hybrid. Also, the cannon im planning will have a steel chamber so the conductive chamber + spark plug idea you posted (markfh11q) would work great! thanks a ton! Just to make sure i have ...

My question is mainly about the spark gap "contacts". Is the best way to setup a spark gap to drill two holes and insert two conducters (im thinking steel wire?) that are insulated? My strategy is to make two "schrader valve" spark plugs (from SB15 i think) and tap them into my chamber very close to...

thanks you for responding: @Novacastrian: I am planning for the chamber to be a 12" piece of schedule 40-20.5" steel pipe The volume (not including the reducers, space from chamber to union-very small as barrell and union will be half inch, or space from chamber to ball valve-gonna be used as inject...

I understand most of the main principles behind a hybrid but i still have a few questions that I have yet to figure out. First of all, let me get this straight (please tell me if im wrong about anything, i don't really wana blow myself up) For a standard 4x hybrid launch: 1) Fill propane meter (mete...