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Board » General Discussion » Polar for First 40.7

Posted by
76Trombones


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2009-08-03 18:04:56
2010-07-16 14:09:12 - Polar for First 40.7
Our current polar doesn't really do this boat justice. I've attached an update based on Farr's own / IMS VPP.

Pretty similar from 0-20 kts. It's a tiny bit faster but the main difference is the addition of wind curves out to 30 kts TWS and better(?) data between 150 and 180 TWA.



Comments? Good/Bad idea?
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Posted by
Exmeromotu


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2008-12-10 15:22:17
2010-07-16 14:34:13 - Re: Polar for First 40.7
I say aye!

Anything that makes this "simulation" more like IRL is good. Nice work 76T!

Regards
Posted by
NZL_undercover


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2009-07-31 03:29:32
2010-07-17 11:01:33 - Re: Polar for First 40.7
Hi Guys

The First 40.7 is now an old model.....
The new Farr boat is a First 40 so newer and faster. First 40.7 I think is a 2004ish design or earlier.

Cheers Undercover
Posted by
sol


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2008-08-14 11:08:14
2010-07-17 14:42:33 - Re: Polar for First 40.7
Good point. I think one of the reasons that the First 40.7 is a popular boat for some of the local races is that lots of people have sailed on or against them? It's been requested for a couple of upcoming races.

Here's a polar for the new model if anyone wants to use it in their races:

76T
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Posted by
BER_Baggus


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2008-12-26 18:46:10
2010-07-22 13:58:09 - Re: Polar for First 40.7
Can I ask a general polar question? On SoL, we are looking at the True Wind angle on the polar diagrams. On the copy I have for one of the boats I sail on (Lindenberg 28), it refers to the apparent wind angle.

Whcih should I be taking more notice of?
Posted by
A2


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2009-10-26 00:39:42
2010-07-22 14:23:04 - Re: Polar for First 40.7
SOL Polars are representative for the TWS given in the game. There is no need or distinction for Apparent Wind formulation. Another way to look at it is the compensation is built into the Polars as given.
None so blind
Posted by
76Trombones


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2009-08-03 18:04:56
2010-07-22 16:51:22 - Re: Polar for First 40.7
Right.

For real boats, use the TW polars for navigation and (optionally) the AW ones for picking tacking angles based on onboard instrumentation. (unless you have modern fancy integrated insruments)

Target speeds can often be a better/easier way to maximise performance:

http://www.sailingworld.com/experts/get-your-performance-on-target

http://www.ockam.com/functarg.html
Posted by
Svein


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2009-05-04 15:09:20
2010-08-04 14:18:42 - Re: Polar for First 40.7
OK, so which polar is used in SOL races?

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