Maximum VMG question
Post by iconPost by Cags | 2011-11-19 | 13:44:46

I am maximising my VMG to a mark using 'boatSpeed*COS(angleToMark)'.
However, when the mark is inside the tacking angles but not directly upwind, the optimum VMG to the wind and the optimum VMG to the mark will be different. In a race, we always sail to the wind and spend longer on one tack. My question is, what are the limitations to the cosine formula and is there a better optimisation routine?
I understand the SS optimises by minimising the distance to the mark over all possible routes.

commenticon 2 Comments
Post by iconPost by Cags | 2011-11-19 | 13:47:06
Forgot to say, great site, wonderful concept and powerful engine. I rarely get impressed but I certainly am now. Thanks and keep up the good work.
Cags
Post by iconPost by zezo | 2011-11-19 | 14:54:56
One of the reasons to sail towards the mark first during the race is that in real life the conditions change and in a possible wind shift you can be in worse situation if you take the other tack first.

That does not matter when winds are known and fixed in advance. But you could always apply your practical knowledge to the suggested strategy - it will work well for the longer tracks.
border
Topics list
Posts
border
4
border
border
26
border
border
53
border
border
42
border
border
12
border
border
5
border
border
17
border
border
2
border
border
4
border
border
3
border
border
1
border
border
35
border
border
3
border
border
2
border
border
11
border
border
4
border
border
15
border
border
8
border
border
5
border
border
11
border
border
5
border
border
Copyright 2009 by ZEZO.ORG. All Rights Reserved.