Transition from plow to plane

Discussion in 'Powerboats' started by Tim Lamp, Feb 15, 2019.

  1. DCockey
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    DCockey Senior Member

    Look at boats with hulls sometimes described as "Downeast" type and also commonly used on North Carolina sportsfisherman. These hulls have a warped bottom with very shallow deadrise at the transom and at rest the bottom of the transom is close to the surface of the water. Versions intended for higher speeds have chines.
     
  2. Mr Efficiency
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    Mr Efficiency Senior Member

    Depending on how you define fast, the only style of boat with good characteristics slow, mid, fast, is the displacement cat, but only if you think 20 knots a good top speed. It pretty well goes as well, at any speed along that range. In the end, the top speed is limited by high frictional drag from the immersed hulls, and you also need a lot of beam to keep the interference between the hulls down, but it is the least speed sensitive of all. Hump, what hump ?
     
  3. JamesG123
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    JamesG123 Senior Member

    The eternal headache of dynamic CoG and CoP.
     
  4. DCockey
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    DCockey Senior Member

    What do you mean by "dynamic CoG"? Or did you mean "CoG and dynamic CoP"?
     
  5. DCockey
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    DCockey Senior Member

    I should add that light displacement for the length is equally important to hull shape for a vessel which performs well from displacement to planing speeds.
     

  6. JamesG123
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    JamesG123 Senior Member

    Both are dynamic because masses within a boat (ie; people and things) will move around.
     
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