Post by iconPost by Alexandria | 2017-10-31 | 12:58:49

Recently, Cvetan said VR is using the proper Clipper polars for Leg 3.

So, today I took a bit of time to check the polar diagram available here against the actual boat speed.

I had in mind a polar hump that was characteristic of the boat in the previous edition.

Well, it is there.

At a TWS of 10.6 knots, the boat speed stops increasing when the TWA reaches 50-55 degrees, and even decreases as TWA increases to 70 degrees (already Code Zero region).

The relevant screen captures are at https://1drv.ms/f/s!AqbPXGCYaCXN6DchJleupJc3dOYO.

My guess is that they are using the Clipper 2015 polar diagram, which I happened to find ar http://gwranking.forumactif.org/h10-outils-pour-vrtool.

If this is correct, the routing suggested may be significantly affected, to the point of becoming useless.

I am sending this to Cvetan, so that he can see what's happening and fix it if necessary.

2017-10-31 1058 UTC

commenticon 4 Comments
Post by iconPost by zezo | 2017-10-31 | 13:14:47
Oh, I fixed it yesterday, but forgot to touch the parameter that would expire the browser cache (many files are heavily cached for 24 hours to save traffic and loading time)

Control-Shift-R or similar would do the trick, now simple reload should suffice. The router itself used the proper polars for the past 20 hours or so.
Post by iconPost by zezo | 2017-10-31 | 13:20:15
I also posted an update here http://zezo.org/forum.pl?tid=6082, dated 2017-10-30 | 16:24:11 (EET) bit it got lost in the noise ;-)
Post by iconPost by zezo | 2017-10-31 | 13:28:18
BTW there is a simple check if the router and polars match - the track tool uses the same files as the polar chart, so if the projected track matches the isochrones and the polars look fine then everything is OK.

But you may have to clear the browser cache first to be sure.
Post by iconPost by Alexandria | 2017-10-31 | 14:48:51
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Island's coordinates
34
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Tara Ocean 4
6
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Solo Maitre Coq
21
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Adjustable timeshift ?
3
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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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