Post by iconPost by BennyLava | 2009-09-08 | 16:00:29

Cvetan; your program advises HS and speed does not match the match. Actually now I get the best speed compared to advised direction with spinaker...

commenticon 6 Comments
Post by iconPost by BennyLava | 2009-09-08 | 16:08:40
duplicate post?
Post by iconPost by zezo | 2009-09-08 | 16:09:59
That's a limitation of the current data format used by the site. The optimum sail is calculated only for the discrete wind speeds in the polars.

In this case (TWA 140) at 16kt the best sail is LS and at 18 the best is HS, so for certain speeds and TWAs the optimum sail will be wrong.

But the speed should correspond to the one possible with the real best sail.
Post by iconPost by BennyLava | 2009-09-08 | 18:33:04
Thanks for the quick response Cvetan. I understand but before the optimizer speed seems to match the game?
Post by iconPost by zezo | 2009-09-08 | 20:01:37
The difference exists only at certain wind speeds/angles. And different races use different polars.

With the PRO polars being artificial you never know what will come up in the next race - see what I've written in the first reply about this race here

In the VOR everything was perfectly in sync because polars were smoother and players had 9 months to reverse engineer and document all the quirks. We'll have to live with minor differences for shorter races - just don't trust the tool blindly about everything it says (you should not do that even if it was perfect)
Post by iconPost by zezo | 2009-09-08 | 21:19:22
I've found one more off-by-one error in my boat polars. That won't fix the 'best sail' issue, but the boat speeds should match now.
Post by iconPost by BennyLava | 2009-09-08 | 21:29:29
Speed matches the game now, cheers!
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Map a little gloomy
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Trophée Jules Verne - Route à l'envers ?
2
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Looks like weather updates offline for next 18h
26
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Bring the good old days back
7
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All.grib 0.0k ?
9
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different speed
3
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Strange 0.5 mille VR Scale
3
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Just an idea for a new feature...
7
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Connexion impossible
1
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Donations
7
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New leader - seems to be using Zezo
38
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Bravo Zezo
4
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zezo : Huge job - Huge thx
2
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Difference between boat speed display on VR, dashboard and polar curves
7
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Vendée Globe: Track lines falling too short of ischrones
8
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Tara Ocean
29
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VR winds currently not up to date ?
1
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"Sails Change" within the Programming
3
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RORC Transat finish moved to Antigua
3
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Weather update not appearing...
19
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Dashboard not updating.
6
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Boats Skins Vendée Globe
3
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Safari on iOS: Bearing lines gone
3
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Wrong coordinates in zezo
2
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Winds in the chart do not show changes between 78 hours and 114 hours forecast
2
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Decoding of All grib
6
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I CANNOT ENTER FOR 3 HOURS IN THE GAME
23
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Why the vc data is yellow underlined ?
3
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Jules Verne 2020 - "Start NOW" discrepancy VS real time
7
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Would like to know the reasenable time to update your pisition on zezo
16
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Arrival Vendée Globe in Normandy !!?
4
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MIssing the Obvious: How to get Zezo routes back into VR
2
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VG 2020-01-02 has Zezo a problem with geographic or ...
8
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How to retrieve a waypoint (TWA/HDG) that already passed...
16
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Track duration window
3
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Ways to bypass the client to give orders?
6
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Problem to Load zero route in windy.com
40
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French tutorial for zezo
4
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boat positioning
2
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Export routes in GPX format ?
4
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Sail selection issue ?
11
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Your friends boats in Google Earth
2
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Delay in Wind update ?N
1
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VR Dashboard
54
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Colone Tile red
3
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Destination setting - Fixer la destination
2
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Anyone else experiencing erratic course changing behavior?
9
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Looks like game winds not updating.
6
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difference between wind on he map and wind on the route
8
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Cape Horn route is not possible it is crossing land
6
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Lost the lines..
2
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all.grb question
3
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2 routings ?
1
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What point or line is being used to determine the rankings?
61
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180 degree bug and downwind track
11
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démarrer avec zezo au milieu de la course
2
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Local times in the charts
1
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red and green lines ahead of isochrones
13
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20 Minute tack
6
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nemo point challenge problem
8
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Nemo Point Challenge
51
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Point Nemoers
1
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Route doesn't give prediction over 24h anymore
7
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Iterations on server & Zezo
5
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Sidney-Hobart 2020
3
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To day zezo don’t give me any route
6
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Fatal Grib error tonight ?
2
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predicted times JV
3
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Loick Peyron uses zezo, the best virtual sailing router ;)
9
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Orthodromy vs loxodromy around the poles
6
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Strange 1st dot heading
3
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Campbell Island
4
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VR bugs and rants
11
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Cap constant, ou angle au vent ? Constant heading, or wind angle?
18
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Colors of wind in the chart
4
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