Dennis said exactly what I was thinking. I can't think of any time when VMG
shouldn't be the metric. Most boats have polars that are flat or concave
between 170 and 190. As I understand it this is likely because the boat has
more wetted surface area when it is flat in the water. Regardless
That’s pretty amazing!
Joel
On Fri, Apr 5, 2024 at 8:11 PM Dreuge via CnC-List
wrote:
> Hi,
>
> Just for the fun of it, I entered the text of your email into ChatGPT4.
>
>
> You:
> I have a set of polars for my C 34+ (below), but I am unsure of how to
> interpret the downwind data. There is
Hi,
Just for the fun of it, I entered the text of your email into ChatGPT4.
You:
I have a set of polars for my C 34+ (below), but I am unsure of how to
interpret the downwind data. There is no information I have found on how the
angles were determined. I am interested in best angles for
Actually, 3 miles might be a bit short. Excuse the tech analysis but if
one assumes you sail 0.5 miles from the rhumb line between the upwind and
downwind marks and the arbitrary waypoint is only 3 miles away, then 0.5/3
is 0.1667 the sine of which equates to an angle of about 9.5 degrees. That
Purely arbitrary. 3-5 miles would probably work.
--
Dennis C.
Touche' 35-1 #83
Mandeville, LA
On Fri, Apr 5, 2024 at 4:33 PM Matthew Wolford via CnC-List <
cnc-list@cnc-list.com> wrote:
> Thanks, Dennis. How did you arrive at 10 miles.
Sent from my iPhone
>
> > On Apr 5, 2024, at 5:31 PM,
Thanks, Dennis. How did you arrive at 10 miles.
Sent from my iPhone
> On Apr 5, 2024, at 5:31 PM, Dennis C. via CnC-List
> wrote:
>
>
> Personally, I think sailing to polars can be challenging. I prefer to use
> VMG. VMG rules for windward/leeward race courses! Bear with me on this.
>
Personally, I think sailing to polars can be challenging. I prefer to
use VMG. VMG rules for windward/leeward race courses! Bear with me on
this.
First, a couple of definitions used by Touche's Nexus instrument system.
Velocity - speed and course
VMG - velocity made good wind based. The
On Fri, Apr 5, 2024 at 2:44 PM Bill Coleman wrote:
> I anguish over this nearly every race, and one thing I can tell you is
> that whichever choice you decide, you will wish you did the other!
>
> Bill Coleman
> Erie, PA
>
>
>
> On Fri, Apr 5, 2024 at 1:48 PM David Knecht via CnC-List <
>
