There is no way to use pressurized air as the energy source and not observe the pressure drop after use. An efficient system may be able to lessen the pressure loss, but it is impossible to eliminate it unless the pressure isn't what's being used as the primary propellant. Many people have used pcp ...

Are you just refusing to read ANY of the 'stickies' or previous posts before making all of these threads?

Or a picture/drawing of your pneumatic whose chamber exhibits no pressure loss from each shot.

Quinn, please stop. D_Hall, I'll have to learn more about Maxwell-Boltzmann and related topics, thanks. I may be at the upper limits of what can be accomplished with propane, in that case. Given your reasoning for the velocity potential with powder, it would stand to reason that hydrogen/oxygen woul...

3d printers are wildly useful for these projects. Obviously not all parts can be made from printable plastics, but I can't tell you how many times I've had to print a specialized mount so I could put an irregular object in my mill vice. This is the current project. Internals are 304 stainless. 3d pr...