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    Re: The mathematics of tacking downwind
    From: Michael Bradley
    Date: 2016 Jul 30, 09:48 -0700

    Bob

    Thanks for the derivation. That'll do me to experiment with.

    And your example results summarise as an approximate rule of thumb, invoking the Beaufort scale to produce a memorable pattern:-

    4kts       F1      40 degrees off

    8kts       F2      30 degrees off

    12kts     F3      20 degrees off

    16kts     F4      10 degrees off

    I try to keep my boat as light and simple as possible, no wind indicator, no computer optimisation, so that's enough for me to experiment with.

    See you on the (usually short) (usually single handed) race course, I'll be looking everywhere except down.

    Good sailing, and thanks again

    Michael Bradley

       
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