http://i37.photobucket.com/albums/e81/03rm125/cannonjpg.jpg Yellow=steel Red=rubber Green=hardware (nuts, bolts, washers, ect) there are 2 valves at the bottom (drawn as ball valves, but i will use an air gun) one is to fill, and one is the release. tell me what you think.. (click the image to make...

alright, ive got some more thoughts and questions. my original plan was to build a breech loading gun, but now the more i think of it, i think i should build it as a coaxial with diaphragm. so my questions are, can i build a diaphragm valve from rubber from an inner tube? i think the pressure would ...

well, whatever i use, i am definitely not going to mess around with threads. im just going to weld it.

also, any thoughts on the piston valve would be appreciated

well, im in the process of building a golf ball cannon, and need some thoughts on what i should do. i and constructing the entire cannon from steel. im not gonna change my mind now. i got a barrel the fits a golf ball nicely, now i need a air chamber. i would rather not construct this part myself. i...

#1 Read the spud wiki, and use the search button before you ask questions like these. #2 Edit your posts instead of double posting. #3 A return spring will work, but it may make the piston slightly less powerful. Oh and welcome to Spudfiles! 1. i have, and theres a lot of great info there. (just co...

oh, and the gun will be running over 100psi if that means anything

Hey everyone, im new here and have a question. can you put a return spring on a piston, or will the force of the spring mess it up? i don't think flow is gonna be a real problem the piston it going to have a very large diameter and a short stroke. the spring would have to have like 1lb of pressure o...