RE: how much hp to plane?
Length is the key for speed and fuel economy, and the reason why ships can go so fast. **For semi and full its mostly based on the length of the hull. The Eagle with a water line length of 53 ft can cruise at 10 and max at 12+ with a single 165 hp DD 671. I think, adding more HP you will dig a bigger hole.
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I read somewhere that if you could push a displacement hull fast enough it would dig such a big hole it would fall back into it.* Dont know if its true, but has some merit?* *
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