Looking for Kaplan curves

Discussion in 'Props' started by cmckesson, Jan 20, 2017.

  1. cmckesson
    Joined: Jun 2008
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    cmckesson Naval Architect

    Greetings. Can any of you share with me a set of KT(J), KQ(J), eta(J) curves for the Kaplan Ka series propos, in 19a nozzle? (Or their polynomials.)

    Thanks!

    Chris McKesson
     
  2. daiquiri
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    daiquiri Engineering and Design

  3. jehardiman
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    jehardiman Senior Member

    The polynominals are in SNAME's Principles of Naval Architecture, 1988 ed, Vol 2, Chpt 6, Sect 9.
     
  4. cmckesson
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    cmckesson Naval Architect

    Thank you both! I am embarrassed to learn that it was right on my shelf the whole time...I tend to grab my 1967 PNA instead of the 1988 version. Doh!
     
  5. jehardiman
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    jehardiman Senior Member

    For what it's worth, I also think the 67/78 edition is better written to explain the methods. Back BPC when spreadsheets were paper, explaining the method was more needed because everyone had to write their own code/models.
     
  6. sub_prop
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    sub_prop Junior Member

    Try to see if this David Taylor Model Basin (Carderock Division) document is OK for you:
    NEURAL NETWORK PREDICTIONS OF THE 4-QUADRANT WAGENINGEN PROPELLER SERIES
     

    Attached Files:


  7. cmckesson
    Joined: Jun 2008
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    cmckesson Naval Architect

    Thanks for finding that! Always hard to find four-quadrant data, but in this age of increasing interest in electric drive with regeneration it is increasingly useful.
     
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