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Old 07-19-2018, 11:52 PM   #21 (permalink)
Hersbird
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Quote:
Originally Posted by hayden55 View Post
Can anybody explain how to use that calc for a 15' flat bottom? lol
Use the planing hull and you need the weight, it should be pretty close. A flat bottom with enough power is the most planing hull there is, the v-hulls plane but are designed to keep a cut in the water for stability on waves and turning. A semi-displacement hull is the most inefficient trying to do both a smooth ride and good speed, think James Bond yachts. Who cares how much gas costs because money is no object. There are some exceptions but speed is always a consideration. They will make claims like most efficient design over 15 knots. Displacement hull are traditional ships and sailboats. They are the most efficient hulls speed not a factor. Yet with enough length they can also be pretty fast. The French built a 434 ft long destroyer that ran 52 mph. I would love to have seen that flank speed, boilers at battleshort pressures, blow by.

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