Excess catamarans
Post by iconPost by Alex Wind | 2019-05-02 | 20:10:25

https://excess-catamarans.com/en/challenge

Has someone heard about this?

commenticon 6 Comments
Post by iconPost by mak08 | 2019-05-02 | 22:07:13
Actually, yes (decided not to try), but what I'm really wondering,
there must be some really good jokes about "Excess" "Catamarans", no?

All I can come up with is this

Boat rental: "We have Excess Catamarans!"
Skipper: "Oh, we are 15. I think we need XL."

Post by iconPost by zezo | 2019-05-03 | 08:38:07
I just registered to see if I can get to some kind of polars ;-)

The user interface is quite primitive, no projected track, which may mean there are no user-side polars. The 1-hour position update interval mentioned in the manual does not sound very promising either.
Post by iconPost by zezo | 2019-05-09 | 13:02:24
Correction: The polars are actually available in json format, not very different from the current VR implementation, but they lack explicit data about wind angles and speeds, so need a bit of reverse engineering.
Post by iconPost by Alex Wind | 2019-05-16 | 15:16:20
Thanks Zezo, if you do something can you tell us here?
Post by iconPost by zezo | 2019-05-30 | 16:31:20
Data is quite simple. Linear u/v based wind interpolation, polar points spaced 5 knots/degrees apart, [13][37] array.

Post by iconPost by zezo | 2019-05-30 | 17:20:46
Sail selection is somehow different than VR
http://zezo.org/excess/polars.html

Spinnaker is always faster downwind, with transition angle dependent on wind speed. Upwind sailing uses Genoa->Foc 1-3 with approximate transition speeds of 20-25-30 knots.

Ill build a router page in the following days, but have to get rid of some code first - mostly the pro sails and the complex interpolation.
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