You are correct. People will usually figure that an electric drive will be 2 to 3 times as effficient as an ICE engine in converting energy into thrust, due to less energy lost as heat. Therefore, a 100hp gas or diesel engine can usually be replaced with a 35-50hp motor with similar performance results. Unfortunately, a 50hp motor will draw at least 38kW under full power, which translates to 380A at 100V. So these kinds of power ratings require even higher voltages to keep the amperages reasonable. That doesn't even begin to address the problems of energy storage...
Fair winds.
Eric
Marina del Rey
--- In electricboats@
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> I thought that I read that a 100 hp motor would be the same as a 200 hp gas engine?
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> Sent from my iPhone
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> On Apr 7, 2010, at 9:44 PM, "peoria_diver" <daredster@.
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> Denny,
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> Following sugestions from this group, I did a little online shopping today. Powerboat hulls just don't seem like good candidates to me. Even small trawlers have engines in the 100HP range. I switched back to sailboats and found a couple of centerboard boats at 28'. I am still a little concerned about the stability. I'll have to give it some thought.
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> -Red
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