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Re: [PSUBS-MAILIST] hydraulic efficiency questions



62.4 pounds fresh water, 64 salt water i believe. where you plan on using your sub might make a big difference in going straight to the bottem or never leaving the surface. :)
-km



From: ShellyDalg@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] hydraulic efficiency questions
Date: Tue, 19 Sep 2006 22:33:26 EDT

Hello. I'm not sure if I understand the question, but a cubic foot of air
displaces a set amount of water, depending on how compressed the air is. In
other words, a cubic foot of water ( which doesn't really compress much ) weighs
62.4 pounds. As a starting point, calculate how much water your sub
displaces, weigh the sub with all its parts and occupants and " stuff " ( again, calculate this rather than building one and putting it on a scale ) and what's
left over is the positive buoyancy.
There are conversion charts on the psub site with weights, measures, etc.
Down load and print and it will give you a rough idea of how big/heavy a thing
is.
Frank D.





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