Power prediction methods taking into account trim

Discussion in 'Boat Design' started by nick_m, Feb 6, 2011.

  1. nick_m
    Joined: Feb 2011
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    nick_m New Member

    hello everyone

    I am looking for power prediction methods such as Holtrop-1984, which taking
    into account trim, however i dont know how sensitive Holtrop-1984 method is to trim changes, what i am looking for is how the trim affect resistance (i.e effective power). however i can not use model tests neither CFD progs. Any suggestions ???

    Many thanks
  2. Perm Stress
    Joined: Sep 2009
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    Location: Lithuania

    Perm Stress Senior Member

    Do you mean static or dynamic trim?

    If static, just enter the data of hull in trimmed condition you are interested in.
    If dynamic -Holtrop method do not run to so high speeds, where dynamic trim can drastically change hull characteristics.
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