re: OB/boat related: Any Elec Engineers or solar power experts on the OB?

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twin-hull catamaran

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This is a really efficient hull choice. My only concern is any type of tunnel hull boat does not become very efficient until you acheive a certain speed to create enough lift to reduce wetted surace area. At 10MPH in a heavy boat this may be an issue. I would focus on a boat design that would plane easily for the amount of weight and power involved.

What length boat do you have in mind?

Type of drive system?

For this to be sucessful, boat setup and weight will be a major factor. Allison and Hydrostream have made some small lightweight hulls over the years that planed with very little power.

I've built/raced boats in my past life and have done alot with battery powered gadgets.... I could offer advice from afar....