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I don't mean too thin to hold the expected pressure, but maybe a little
thin if you crash into something. I've been a diver a long time and have been
slammed into rock walls by wave action. I imagine most psubs will be close to
SOMETHING at some point.( You gotta get close to see good! ) I see this sub was
sold today but it seems to me a thicker hull is just an added safety factor. You
have to add weight to get these things to sink, so why not put some of that
weight to good use ? The windows determine your maximum depth as they are the
weakest point. I plan to use AS 516-70 steel at 3/8 inch thick. !/4 inch
calculates out OK but a little extra steel in the beginning can't hurt.
Frank D.
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