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[PSUBS-MAILIST] RE:
I
wouldn't even THINK of an un-reinforced propane tank, they're extremely
thin skinned. They also tend to be long, which is poor from a structural
perspective. Do yourself a favor, get a custom cylinder rolled and put
stiffeners in or outside it (no difference structurally). I know the
hull looks expensive, but in fact its one of the cheapest parts of a sub.
The dome cost me more than the hull. The ring the dome seats in cost me more.
The instrumentation costs more. The welding costs more. If I didn't do my own
machining, that would have cost WAY more. So please, don't skimp on something
which is has a fundamental safety impact and is so cheap to begin
with.
rgds,
Alec
Hey guys, I was wondering if I could get an
answer or two. First, I would like to know if I made a sub out of a NEW
propane tank, would I or should I put rings on the inside to strengthen it or
would it be strong enough by itself? Also, the ballast tanks do they need to
be able to withstand the pressure of water or can they be made out of a light
material?