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Jim Cobb wrote: > >Dear Americans > >Please leave the French bashing to those who do it best: the English! > Well you can start with this Quebecer I found over on Rec.Scuba- I mean > really, how stupid can you get? Please tell me you made this one up <regardless of nationality> :-) > ----------------------------------------------------- > mrmorris@td*.fn*.co* wrote: > > Well, it could be a stupid question. I recently acquired a 120 cf > > steel tank and have some questions about it. It has 2400 psi stamped > > onto it with a + sign (which means a 10% overfill is allowed). Does > > this mean that the tank with 2400 psi contains 120 cu.ft. of gas, or > > does it require 2640 psi to come up to 120 cu. ft.? > > > Let me explain in other word. > Whatever pressure you have in your tank, you always have 120 cu.ft in > your tank. 120 cu.ft is the volume of air and is independent of the > pressure. So that's how George does it... even when his guage says zero psi, he still has xxx cu ft of gas :-) Granted, metric measures work this way (tank volume, liquid-wise), but that should be no excuse. I won't bother working out what a 120cf volume tank would look like (cylindrical) but a square one would be, oh, 30x2x2 feet (OK, 4x5x6 might fit on your back). Can you imagine the buoyancy of an aluminum one? :-) Hell, that reminds me of the old Volkswagen commercials where they'd drive a beetle into a lake. But then again, if you're inside the thing we're talking about a submersible, not scuba... Jeff Kell <jeff-kell@ut*.ed*>
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