It's a cannon... not a mortar. And... I wonder why people used to use so much steel when manufacturing canons... all they really needed was a 1/2" thick sidewall.
Idiots self-confirming idiotic behavior:
Ted: "Hey bob, let's use this hunk of pipe as a cannon."
Bob: "I don't see why we couldn't."
Ted: "When we're done we should put up a web site documenting our stupidity."
Bob: "I don't see why not."
Potato guns are stupid. This is simply idiotic.
MiniD