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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. Inother words, a cubic foot of water ( which doesn't really compress much ) weighs62.4 pounds. As a starting point, calculate how much water your subdisplaces, 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'sleft 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 thingis. Frank D.
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