High deadrise high radius keel

Discussion in 'Boat Design' started by romeomikehotel, Jan 28, 2020.

  1. romeomikehotel
    Joined: Feb 2019
    Posts: 29
    Likes: 3, Points: 3
    Location: Ft Lauderdale

    romeomikehotel Junior Member

    Hello,

    In regards to hull design I know that a lot of attention gets paid to deadrise angles, chine width, beam, etc. but I’m hoping that those of you with more knowledge than myself can provide some insight on another variable in hull design and give a brief explanation on the pros/cons or trade offs in a higher radius keel on a deep V hull design.

    For example, almost every deep V (24*+ deadrise) boat I’ve seen, the hull comes to a true V at the keel. But the Bertram 20 that I’m restoring, has a high radius keel... there is no sharp angle where the hull sides meet though it has a deadrise angle at the transom of 26*.

    So mainly hoping to be educated on the trade offs or why one design might be chosen over the other or where each design performs better.

    Regards,

    RMH
     
  2. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    It makes for a little less draft with a single engine. It is a structurally better. It doesn't make a lot of difference performance wise.
     
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  3. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

    A rounded "bluff" corner transition is much better than a sharp fine edge in composite that is subjected to floating debris etc.
     
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  4. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    Some used to say the rounded vee lent itself to chine walking, but for general sane usage, I doubt it makes any great difference.
     
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  5. romeomikehotel
    Joined: Feb 2019
    Posts: 29
    Likes: 3, Points: 3
    Location: Ft Lauderdale

    romeomikehotel Junior Member

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