Plank Keel

Discussion in 'Boat Design' started by ed040353, Nov 25, 2016.

  1. ed040353
    Joined: Nov 2016
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    Location: Winchendon, Ma.

    ed040353 Junior Member

    What determines the need for a wide (tapered end-to-end) plank keel in a lapstrake canoe such as Cullers Butternut? Versus a straight keelson/keel.
    Is it for more strength, necessary for the garboards to fit due to hull shape, appearance, or some other reason?
    Is there any reason why a straight keelson/keel could not be used in it's place, with the proper adjustments to the garboard planks?

    Thank you for your time.

  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    A plank keel makes the construction much easier. For example, the garboard will need a lot less twist.
  3. messabout
    Joined: Jan 2006
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    Location: Lakeland Fl USA

    messabout Senior Member

    Gonzo has named a good reason. Compared to the wine glass section shape, there are several other reasons for using a plank keel. One is that the boat will sit upright when grounded, there is actually a small decrease in wetted surface, and a small decrease in draft.. In addition the interior is slightly easier to clean so that fish guts and other detritus is more easily located and removed. Pete Culler was a practical old guy.
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