pic: T-Shirt Launcher, still needs a chasis

[Mr. Freeman]

Originally Posted by Steigerwald

I think that people need to see that sometimes things that aren't expected happen.

Yes, but there is a point at which it reaches absurdity. Bringing up cases of bridges collapsing doesn't help anyone determine failure modes of a potato cannon.
I do agree though that this cannon should be able to withstand a T-shirt getting stuck in the barrel. I do see this as actually being a possibility due to T-shirts being pressed into the barrel too tightly, rubber bands around them increasing friction with the barrel, etc. That said, air will move through the T-shirts. I don't know how fast, but it might not be as bad as being completely clogged.

Anyway, on the subject of PVC. Why do I keep hearing stories about pressure rated PVC exploding? Air/water shouldn't make any difference regarding what pressure it fails at, only what happens AFTER the PVC fails.

Seems to me that if PVC rated at 400+ PSI fails at anything less than 400 PSI then it was either:
A) Not actually rated
B) Not properly used (exposed to conditions it wasn't rated for, etc.)