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Having designed vessels from 42 to 67 meters O A which have been built and sea trialed at speeds substantially above 50 knots, I question the buttock shapes of the monohull portion of the hull as being somewhat non-lifting in the hump and higher speed ranges. The monohull bottom shape is analogous to attempting to making a canoe plane. Negative dynamic hull bottom pressures will be developed beginning near 25 knots which may "pull down" the bow instead of lifting it.
My advice is to carefully study this hull form with realistic model tests before marketing energy takes control of decisions on committing large financial resources.
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