Mathematically-designed and CNC made surface-piercing propeller by McCauleyandson

Discussion in 'Surface Drives' started by sandhammaren05, Aug 5, 2020.

  1. sandhammaren05
    Joined: May 2009
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    Location: Texas & Austria

    sandhammaren05 Senior Member

    A first for our design. Chapter 5 in the book.
     

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    sandhammaren05, Aug 5, 2020
    #1
    DogCavalry and powerabout like this.
  2. DogCavalry
    Joined: Sep 2019
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    DogCavalry Senior Member

    What speed range for this specific prop?
     
    DogCavalry, May 27, 2022
    #2
  3. sandhammaren05
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    sandhammaren05 Senior Member

    It's made for 30-35 sec courses with sharp turns at both ends. Speeds
    are typically 60-65 mph @7000-7400 RPM with 1:1 gear ratio at the end of a straightaway.
     
    sandhammaren05, May 27, 2022
    #3
  4. DogCavalry
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    DogCavalry Senior Member

    1:1 at the end? Different ratios through the corners?
     
    DogCavalry, May 27, 2022
    #4
  5. sandhammaren05
    Joined: May 2009
    Posts: 436
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    Location: Texas & Austria

    sandhammaren05 Senior Member

    It's made for 30-35 sec courses with sharp turns at both ends. Speeds
    are typically 60-65 mph @7000-7400 RPM, with 1:1 gear ratio, at the end of a straightaway.
     
    sandhammaren05, May 27, 2022
    #5
  6. baeckmo
    Joined: Jun 2009
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    baeckmo Hydrodynamics

    And what powers are we talking about?
     
    baeckmo, May 29, 2022
    #6

  8. DogCavalry
    Joined: Sep 2019
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    Location: Vancouver bc

    DogCavalry Senior Member

    DogCavalry, May 29, 2022
    #7
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