pic: T-Shirt Launcher, still needs a chasis

[artdutra04]

Originally Posted by squirrel

Interesting....I wonder what the actual maximum pressure is on the T shirt side of the valve? Mainly I wonder this because we have a similar situation, using PVC (although not with a reducer like that) on our T shirt cannon on the same side of a very similar valve.

Let's say that an air cannon has a 120 PSI storage accumulator, and when the valve is opened, for some reason the tee shirt jams in the barrel. Since the 120 PSI just expanded to a slightly larger volume (between the valve and the tee shirt), the overall pressure will drop slightly, but will still remain very high. Regardless of whether it jams or not, all fittings in the entire shooter have to be able to withstand the maximum pressure in the accumulator, because all of the fittings near the barrel will see similar pressures in very short bursts.