Lift loss with increasing deadrise

Discussion in 'Hydrodynamics and Aerodynamics' started by DogCavalry, Jul 8, 2021.

  1. BlueBell
    Joined: May 2017
    Posts: 2,120
    Likes: 654, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . . .

    I agree.

    Okay, the penny drops...
    In my struggle to understand DogC's op, I mistook what he was on about.
    Sorry JDog, as you were.
    Carry-on.
     
  2. HJS
    Joined: Nov 2008
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    Location: 59 45 51 N 019 02 15 E

    HJS Member

    Last edited: Jul 9, 2021
  3. Jimboat
    Joined: Feb 2002
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    Location: Canada

    Jimboat Senior Member

    Yes. Angle of Attack influences basic Lift Coefficient [Clo], in Savitsky's formula, which changes with Trim Angle.
     
    Last edited: Jul 9, 2021
  4. DogCavalry
    Joined: Sep 2019
    Posts: 2,509
    Likes: 1,256, Points: 113
    Location: Vancouver bc

    DogCavalry Soy Soylent Green: I can't believe it's not people

    Angle of attack is trim angle, translated from fluid mechanics terminology, to marine terminology.

    What was of greatest interest to me is how sharply Cl suffers with increasing deadrise. Naturally, as a sea sled fan, the 0° deadrise transom and what it means is the focus of my attention.
     
  5. Jimboat
    Joined: Feb 2002
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    Jimboat Senior Member

    Agreed (AofA = Trim Angle). Sea Sled is very interesting and unique design.
     
    DogCavalry likes this.

  6. DogCavalry
    Joined: Sep 2019
    Posts: 2,509
    Likes: 1,256, Points: 113
    Location: Vancouver bc

    DogCavalry Soy Soylent Green: I can't believe it's not people

    You're my new best friend!
    I'm building one now, and it's taking every minute and evry penny I have, so I'm trying to understand them as well as possible.
     
    Jimboat likes this.
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