Powerboat Turning / Chine Design

Discussion in 'Boat Design' started by skiffguy, Dec 10, 2010.

  1. skiffguy
    Joined: Nov 2010
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    skiffguy New Member

    Id like to hear thoughts on this topic. Hard chine and slippage VS soft chine (round) bildge and digging / rolling into turn on planing hulls / powerboats.
     
  2. michael pierzga
    Joined: Dec 2008
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    michael pierzga Senior Member

    Id also like to hear how a chine spray chine works when located aft of the beam.
     
  3. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    I am not quite sure about what is being asked in these questions........ but obviously a hard chine is more efficient as regards lift and wetted area, all else being equal. I have seen planing hulls, outboard powered, that heeled pretty dramatically in turns because of the lack of a hard chine.Wide spray chines aft will further reduce heel in turns, and also flatten the angle of attack underway, because they create greater lift, at a point well to the rear, but can harden the ride, in some conditions.. For deadrise at the transom more than about 12 degrees, digging in and tripping when pushed hard in turns should not be an issue, there will be enough heel to avoid problems.
     

  4. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    Your question can't have a significant answer.There are many more factors than just hard and soft chine.
     
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