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This page is experimental and may give wrong results. It is still under development. Results may be in error.
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When sailing upwind or downwind the best velocity made good (VMG) occurs at approx 42-55 deg either way from directly upwind or approx 40 deg either way from direct downwind. Note that these angles refer to true wind angles.
Depending on the polars there may be other desired directions where sailing at a slightly different angle gives a better VMG.
Update 20:20pm 28 August. The published polars (as of 18th August) have been updated. I have just worked out the new ones and added them into the program above. If anyone checks some of the outputs, please tell me. I've tested some samples and it seems OK but you can never tell !!
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► Page created 2011, amended 22 May 2016 Eric Johnston