Comparison of hulls and keels

Discussion in 'Sailboats' started by misanthropicexplore, Oct 11, 2019 at 10:18 AM.

  1. misanthropicexplore
    Joined: Apr 2018
    Posts: 60
    Likes: 3, Points: 8
    Location: Upper middle Missouri River

    misanthropicexplore Junior Member

    Three designs interest me: The Thunderbird 26, The Barchetta Class, and the MaxiMOOP. (Also a 3D model of the MaxiMOOP here, if you are interested.) Despite being 26', 20', and 4', all of them have successfully crossed oceans.

    If you scale them up to identical lengths, they are all very comparable in basic measures, with the exception of the keel on the MaxiMOOP: it's absolutely massive compared to the other two.


    The designers say it's to help it move in light winds, but I thought deep heavy keels made it harder to move in light winds.

    Is it an issue of the speed? The MOOP only goes 2.5 knots.

    It is the fact that waves don't scale?

    Is it a practical thing? While the MOOPs keel is large in scale, it's very shoal in real life inches (about 16")

    Thanks all, look forward to hearing your thoughts.
  2. BlueBell
    Joined: May 2017
    Posts: 746
    Likes: 76, Points: 28
    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    The robots keel is massive to keep it upright at the minimal cost of increased drag.
  3. gggGuest
    Joined: Feb 2005
    Posts: 806
    Likes: 16, Points: 18, Legacy Rep: 76
    Location: UK

    gggGuest ...

    Basically boat designs don't scale very well, especially to such an extreme.
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