How Big A Keel Verses Sail Area?

Discussion in 'Boat Design' started by Boatcat65, Dec 23, 2016.

  1. Boatcat65
    Joined: Jul 2016
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    Boatcat65 New Member

    Looking to change the fixed keel on my boat to a retractable one, more of a daggerboard with a ballast bulb. Looking at the newer race boats I get the sense they have a lot less lateral plane area than older designs. My boat appears to have two to three times the lateral area that it needs. The boat is a custom 40' ultralight design from the 1980s. Ideas on just how much area one needs relative to sail area or overall length? Preferred NACA foil? Thanks
     
  2. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

  3. Boatcat65
    Joined: Jul 2016
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    Location: Seattle

    Boatcat65 New Member

    Ah... found some articles by Sponberg and Vacanti that answer all my questions- thanks!
     
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