Bow Shape, Drag

Discussion in 'Boat Design' started by Bern, Sep 20, 2004.

  1. Bern
    Joined: Apr 2004
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    Location: WA

    Bern Junior Member

    What shape bow has the least amount of drag, Jon boat style, Model, or ???? How much difference will there be, significant? (Beam of 7 ½ feet, Length of 18 feet, Draft 5 inches, Speed max. of 7 MPH, Chine 90 degree) Looking for minimum drag. Thanks for any and all advice/comments.
     
  2. jehardiman
    Joined: Aug 2004
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    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    From the statement "Jon boat style" I assurme you're just making a small jon boat/box barge. No bow shape will help that length, breadth, depth, and chine shape. Just rake it 30-45 degrees above horizontal like a barge and snub it off to a convient depth for the bow transom. You don't want a large overhang so you can use the ends.
     
  3. Bern
    Joined: Apr 2004
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    Location: WA

    Bern Junior Member

    Left out info.

    Oops, Make that a flat bottom boat with a few skegs.
     

  4. jehardiman
    Joined: Aug 2004
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    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    Well what is it? A unpowered shanty boat to be towed/pushed? A jon boat to be motored in a protected area? A a high performance sailing scow? A 90 degree chine is a poor hull form and a L/B of 2.5 ain't too hot either!
     
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