Post by iconPost by lucarc | 2020-11-29 | 13:31:54

Hello,

It seems that the polars from the game (thanks again toxxct for your polars) do not fit the polars form zezo when it comes to a TWA around 135° and a wind speed around 26Knts / 28Knts, making us use the C0 sail instead of the HG in the game, while zezo thinks it is otherwise.

I know this issue of little differences between zezo and the game is already known, I just wanted to notice you about this fact. For those sailing in the 40°S, you may lose close to a mile with 2 changes of sail really quickly if you do not pay attention.


commenticon 4 Comments
Post by iconPost by zezo | 2020-11-29 | 14:22:42
The indicated sail is not exact. It's defined statically within +/- 0.5 knots

The sails are equal at 135° between 26 and 27 knots. And above 27 the router should not select 135 because there is a dip in the polars.

Post by iconPost by lucarc | 2020-11-29 | 15:28:21
Okay, I got your point. I thought this was due to the polars from this link, which indicates HG to be the best sail at TWA 135 for winds slower than 27 Kts : http://zezo.org/vg/polars.html?opt=0

At TWA 135°, the transition between C0 and HG is set at 26,9 Kts with these polars, whereas it is 26,4 Kts in the game.

Thanks for answering though
Post by iconPost by zezo | 2020-11-29 | 15:47:21
26.9978 actually. That's 50 km/h. Leftover from the time the game polars were defined in km/h years ago. Best sail is still defined in terms of km/h

The router actually uses a 'composite sail' which is a single polar with indication of the best sail at certain speeds. But it only contains finite number of points (130)
Post by iconPost by toxcct | 2020-11-29 | 19:25:29
On my App though, each sail can be seen altogether on the same chart
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Adjustable timeshift ?
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gate crossing question
7
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Expanded View on PC
3
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Panic at VR Nord
7
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Delays during the sail changes, or directions changes
3
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(Game wind = Zezo wind ) ⍯ (Grib winds = Windy.com)
7
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VR ending the ELO ranking.
34
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NMEA feed
128
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Dashboard Map Track Label not including the segment.tag
5
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VR ingame time
6
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VIRTUAL REGATTA and Phillip Ganier. Worst and worst every day...
7
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beta.realsail.net
2
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Escort Frigate
6
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Out of memory. If you are the developer of this content ....
17
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Question about GFS Grib
5
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RORC Caribbean 600
14
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sliding VSR
16
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Trying to use Zezo to select best combination of sails to select
7
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TARA OCEAN 3
9
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RORC Transatlantique Race
6
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Game appears stuck on 00Z weather from yesterday
4
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Sydney to Auckland
28
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Personal Message pages deleted
7
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New zezo fonction
2
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VR Ranking 2021
7
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Autosail malfunction
3
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Comments from a newbie to "long term" routing
1
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Massive thanks to Cvetan
7
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Fleet section mode record not working
2
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Possible routes on the Map tab
3
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Purple skippers on VR Dashboard
3
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UTC or CET time ?
2
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multiple routes?
2
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Real Sail
4
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Map a little gloomy
8
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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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