Wow, those were some quick replies!! rmich732: I was thinking of using a 4" tee but is there any reason I shouldn't? It's bigger so it should be less of a bottle neck (I would think) and it should require less fittings/adapters than a 3" tee. Pete Zaria: I have a 10ft x 4" inch piece of pipe I'm goi...

I'm building my first pneumatic launcher after several combustion launchers. I have two questions: What is the recommended chamber to barrel ratio for a pneumatic launcher? I have a 10ft x 3" barrel what should the length of the chamber be if it is 4" PVC? Second, I'm going to be making a "Barrel Se...