Atmospheric surface layer profile

Discussion in 'Hydrodynamics and Aerodynamics' started by fastwave, Jun 4, 2020.

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  2. fastwave
    Joined: Jan 2007
    Posts: 128
    Likes: 24, Points: 18, Legacy Rep: 36
    Location: europe

    fastwave Senior Member

    Hi Doug,
    ofcousre there are many boats out there ranging vastly in performace.
    We are diverginf a bit but:
    The variation of AWA (apparent wind angle) with height can be very easy calculated with the wind gradient and trigonometry.
    Below an example of the variation for a slow, fast and very fast yacht.
    This is at 10knots wind speed and 40deg True wind angle.

    upload_2020-6-9_14-8-49.png
     
    fastwave, Jun 9, 2020
    #16
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