Add a dirty bottom at this time of year and they'd work for my boat
too. :-)
Are you using speed over ground or speed over water for your baseline speed?
--
Cheers,
Jeff Nelson
Muir Caileag
C&C 30
Armdale Y.C.
Halifax
On 9/27/2016 6:24 PM, RANDY via CnC-List wrote:
Those are a reasonable approximation but they're from a 30E, the
European edition of the 30, which has a different design from my MK I
(e.g. reverse transom, different interior, probably different
displacement), and who knows what sails and what kind of prop etc.
That boat is apparently fastest on a shallow broad reach, probably
under spinnaker.
Assuming I can get an accurate set of polars for my boat this year,
they'll still show lower speeds than the boat's true potential,
because I have old tired sails including an undersized main, and I
have a fixed prop. Even so I'd like to get an accurate set of polars
as a baseline to compare against when I have new sails and a folding
prop, hopefully next year. Then hopefully I can sail the boat to its
true speed potential.
Cheers,
Randy
------------------------------------------------------------------------
*From: *"Bill Coleman" <colt...@verizon.net>
*To: *"RANDY" <randy.staff...@comcast.net>
*Sent: *Tuesday, September 27, 2016 1:26:24 PM
*Subject: *RE: Stus-List C&C Polars Again
Can’t you just use the polars given on that site? They have a C&C 30
*Wind velocity*
*6kts*
*8kts*
*10kts*
*12kts*
*14kts*
*16kts*
*20kts*
Beat angles
45.5°
43.7°
43.3°
43.7°
43°
41.3°
40.5°
Beat VMG
2.55
3.08
3.46
3.8
4.14
4.39
4.53
52°
3.98
4.73
5.31
5.82
6.15
6.35
6.5
60°
4.26
5.02
5.65
6.08
6.34
6.52
6.72
75°
4.51
5.3
5.94
6.29
6.49
6.67
7.02
90°
4.64
5.61
6.24
6.55
6.71
6.8
7.04
110°
4.77
5.75
6.31
6.63
6.93
7.23
7.53
120°
4.65
5.63
6.24
6.57
6.86
7.18
7.75
135°
4.27
5.19
5.97
6.39
6.67
6.96
7.56
150°
3.68
4.6
5.39
6.04
6.4
6.66
7.21
Run VMG
3.19
3.99
4.69
5.33
5.92
6.31
6.83
Gybe angles
148.1°
152.1°
153.5°
159.8°
180°
180°
180°
Right?
Regards,
Bill Coleman
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