trim angle

Discussion in 'Boat Design' started by jollyricard, May 30, 2010.

  1. jollyricard
    Joined: Jul 2009
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    jollyricard Junior Member

    hello, you can list all the existing methods to change the trim angle of planing hulls and how do they work?
     
  2. marshmat
    Joined: Apr 2005
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    Location: Ontario

    marshmat Senior Member

    Either change the weight distribution, change the thrust line, or change the shape of the running surface.

    Weight distribution is changed simply by moving people, cargo, tanks and equipment fore or aft.

    Trimmable engines (sterndrives, outboards and a few high-speed jets) can change the thrust vector to suit the conditions.

    The running surface can be modified with trim tabs, fixed extension flaps, or by using fairing compound to adjust the hull surface. Some whale-tail fins can also change the effective running surface.

    Generally speaking, for a given hull, proper distribution of weight tends to be a more effective solution than throwing extra hardware at the problem.
     
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  3. jollyricard
    Joined: Jul 2009
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    Location: italy

    jollyricard Junior Member

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