I would be interested in your data points as well. I have
a 155 on Penniless, but change down (usually) before I get
the rail in the water. I have a number 2 which is about
140%, and I find the boat sails just as well with it,
without the drama. As we are in a light wind area, maybe I
can provide some data as well - I have a wind instrument,
so can provide speed (from GPS) and apparent wind. I
cannot seem to get my in-the-water speed wheel to work in
the water, but it works fine when not installed.
Gary
#593
On Thu, 22 Sep 2016 20:33:18 +0000 (UTC)
RANDY via CnC-List <cnc-list@cnc-list.com> wrote:
Hi Ron,
I'll happily send you the data I get from the SailTimer
App. I'm excited to see it; it will be the first time
I've had wind instrumentation on the boat. I know I can
carry full sail - I had full main and 155 up in 30 kts.
earlier this year, and my genoa tore before I could get a
rail in the water :) But I will have my mother on board
tomorrow, so I'll have to judge how much sail to carry
based on her comfort level.
Cheers,
Randy
----- Original Message -----
From: "Ronald B. Frerker via CnC-List"
<cnc-list@cnc-list.com>
To: "cnc-list" <cnc-list@cnc-list.com>
Cc: "Ronald B. Frerker" <rbfrer...@yahoo.com>
Sent: Thursday, September 22, 2016 1:37:38 PM
Subject: Re: Stus-List C&C Polars Again
I'd be interested in your data since I have a '73
edition of the 30. I don't have the polars, just the IMS
tables from the Chi-Mac IMS registration from 25-30yrs
ago.
BTW, you should be able to carry the 155 with no problem
at 15 gusting 20. I carry a 160 in those conditions.
I pinch up a bit over my normal keeping the inside
telltales lifting straight up and slight twist at the
top, the traveler down again with a little twist and
carry a bubble in the main, sometimes up to 50% of the
main. As long as the rail isn't in the water, it should
be fine.
And it will be a really fun ride.
Ron
Wild Cheri
C&C 30-1
STL
From: RANDY via CnC-List <cnc-list@cnc-list.com>
To: cnc-list <cnc-list@cnc-list.com>
Cc: RANDY <randy.staff...@comcast.net>
Sent: Thursday, September 22, 2016 11:28 AM
Subject: Stus-List C&C Polars Again
Listers-
Just wanted to share a site I saw with polars for a few
different C&C models:
http://jieter.github.io/orc-data/site/
If you look at the list of boats in the left-hand column
(or search for "C&C" on the page), you'll see the
following models:
* C&C 30 (this is the new one-design version, I can tell
from the boat speeds downwind - it planes :)
* C&C 30E (this is the European edition of the C&C 30,
apparently built & sold 1977-1982)
* C&C 37
* C&C 38
* C&C 110
* C&C 115
Just click on one of those boats and you'll see its
polar diagram and polar table.
I realize that polars are very boat-specific and
sail-specific, but at least here are some data points.
For example the other week I took a couple hundred pounds
of stuff off my boat, emptied the tanks, and cleaned the
bottom, and I think it made a difference in light air.
But my sails are old and tired, so I know my boat's
polars will change again when I get new sails and a
folding prop.
For us software developers on the list, it almost looks
like this guy @Jietermanis might have github-hosted
software to create polar diagrams from user-supplied
polar table CSVs. I've tweeted him for more information.
Last night I got my SailTimer Wind Instrument installed
at the masthead, so when I go out tomorrow afternoon the
SailTimer App will be able to learn one polar curve for
my boat, assuming I'm optimally trimmed on all points of
sail. The wind is now forecast to be blowing 15 gusting
20, so hopefully I can get polar data with the same sails
I race under (full main and 155 genoa, no spinnaker). If
the wind gets much stronger I might have to reduce sail,
so the polar data wouldn't be representative of my normal
racing configuration.
Best Regards,
Randy Stafford
S/V Grenadine
C&C 30-1 #7
Ken Caryl, CO
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_______________________________________________
This list is supported by the generous donations of our
members. If you like what we do, please help us pay for
our costs by donating. All Contributions are greatly
appreciated!
_______________________________________________
This list is supported by the generous donations of our members. If you like
what we do, please help us pay for our costs by donating. All Contributions are
greatly appreciated!
