[PSUBS-MAILIST] formula

[Alan via Personal_Submersibles]

Hank,
air weighs .0807 lbs per cubic foot approximately, depending on temperature.
So if you have an 80 cubic foot scuba tank the air weight full is 6.45 lb.
A scuba tank is 80 cubic ft at 3000 psi. If you halve the pressure you halve
the amount of air & weight. In other words, if you double the pressure you
double the weight for a given volume.
Let us know what you are trying to calculate if this doesn't help.
Alan



Sent from my iPad

> On 4/03/2017, at 6:33 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Okay, I am stumped!  can someone give me a formula to calculate the weight of air at a particular psi per cubic foot.
> Thank you
> Hank
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