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J30 Polars from UK Website [Re: Rhapsody #348] #9382
04/20/10 02:46 PM
04/20/10 02:46 PM
Joined: May 2007
Posts: 2,668
Portsmouth, RI
Rhapsody #348 Offline
Past J/30 Class President
Rhapsody #348  Offline
Past J/30 Class President
Joined: May 2007
Posts: 2,668
Portsmouth, RI
This file was added to the post with the other polars. Looks very similar to the Expedition file.

J/30 Polars from UK Website in Excel Format

Digging into Polars [Re: Rhapsody #348] #14418
01/15/13 12:26 AM
01/15/13 12:26 AM
Joined: May 2007
Posts: 1,234
Newport and Naples
Cap'n Vic Offline
Senior Member
Cap'n Vic  Offline
Senior Member
Joined: May 2007
Posts: 1,234
Newport and Naples
so ok ... i am missing something here?

1. do we assume that the polars going up to 22 kts wind are only using the 163? if not where do they change?

2. if at true wind speed of 6 ... true wind angle of 47.5 ... are we thinking that the tack is 95 degrees.

and then at 14 true, the tack is 86 degrees?

3. and then what is OPT VMG? to waypoint?

Also there seems to be a broken link re J/Boats

[Linked Image]

Re: Digging into Polars [Re: Cap'n Vic] #14419
01/15/13 12:58 AM
01/15/13 12:58 AM
Joined: May 2007
Posts: 2,668
Portsmouth, RI
Rhapsody #348 Offline
Past J/30 Class President
Rhapsody #348  Offline
Past J/30 Class President
Joined: May 2007
Posts: 2,668
Portsmouth, RI
Originally Posted by Cap'n Vic
so ok ... i am missing something here?

Also there seems to be a broken link re J boats


Vic - It appears that J/Boats has revised their website. I just sent a message to them asking if we can get the J/30 content restored.

Re: Digging into Polars [Re: gmo] #14420
01/15/13 10:06 AM
01/15/13 10:06 AM
Joined: May 2007
Posts: 2,668
Portsmouth, RI
Rhapsody #348 Offline
Past J/30 Class President
Rhapsody #348  Offline
Past J/30 Class President
Joined: May 2007
Posts: 2,668
Portsmouth, RI
A follow up to the post above about the J/30 content on the J/Boats site. J/Boats updated their site over the weekend to a new format. The portion for older boats did not yet get updated, but is in process and will be back online shortly. If any of the links have changed (e.g. the polars referenced by Vic above), we'll search the J/30 Class site and update accordingly.

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