Small pushboat Power - Bollard Pull

Discussion in 'Boat Design' started by S17665, Jun 16, 2017.

  1. S17665
    Joined: Nov 2006
    Posts: 53
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    Location: Europe

    S17665 Designer

    Hi Guys , I have a small pushboat with a Displacement full load 350 Kg so my question is there the possibility to push a barge with a similar displacement and dimensions with only 20 Hp ? What could be the procedure or formulas to check the towing speed ?
  2. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    There are several methods for estimating the power needed to make advance a vessel: Morton-Getler, Guldhamer-Harvald, Holtrop-Mennen, .... Each is more or less suitable for one type of ship although, in general, they are quite good for ships with a large block coefficient, within a certain range of Froud numbers. They can give you a good enough idea of what you need.
    In this forum, in the area of spreadsheets, you can obtain the method of Holtrop-Mennen.
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