Posted by Dave_Benjamin (dave_benjamin@…>)
The pointing ability seems to improve a bit as the windspeed
increases. I don’t think this is just a matter of increased wind
making the apparent wind move forward. I just think the boats can be a
bit piggish upwind in light air unless they have a staysail.
There was a F-44 that won the Bermuda One-Two that used a jib on a
sprit in lighter air. It wasn’t a huge sail by any means but
appraently it really helped.
One other thing. When discussing Freedoms that came in both cat ketch
and cat sloop rigs it’s very helpful to designate which one you’re
referring to. IE 35ck. Sizes that had both rig variations are the 28,
35, and 40.
— In freedomyachts2003@yahoogroups.com, Alfred Roberts
<lab2doodle@…> wrote:
Is 52 degrees the closest Freedoms can sail to windward?? We’ve
beem looking at some F35s and may be interested.Dave_Benjamin <dave_benjamin@…> wrote:
Here’s an example of a polar plot for a J-30http://www.sailingsource.com/j30/splash/images/j30polars.jpeg
Now explain exactly how you plan to derive true wind (not indicated
wind as shown on your anenomter) with your current set of instruments.
In order to do it you’ll need to correct your indicated wind for the
following parameters.Influence of boat movement taking into account both velocity,
direction, sideslip, and effect of local currents.Now this can be readily done provided you have the proper
instrumentation. Remember you’ve got to interface a GPS into this
system to provide the most critical indication which is the movement
of the boat over the bottom. Once the precise movement vector is known
then the computer can remove the effect of boat movement from
indicated wind velocity and direction so that the true wind component
can be used to consult the polars.How many Freedom owners have the appropriate instruments and
electronics to derive true wind speed and direction? With the
exception of some race boats I haven’t seen that capability on a boat.
I’m sure there are a few cruisers with the money to outfit the boat
with that electronic suite. Unless you have the electronics those
polars are pretty much worthless. I’m sure if they were printed on
some nice paper and framed they would make a wonderful decoration.
Might be fun to mount that framed document in the head so you’d have
something to peruse while seated.A good sailor can combine his or her sensory perception of the boats
movement, feel/position of the helm, and the position of telltales to
tell if the boat is moving efficiently or not.— In freedomyachts2003@yahoogroups.com, “Frank Maier” <PVMaro@>
wrote:“jerry_magic1” <jerry_magic1@> wrote:
— “Dave_Benjamin” wrote:
You shouldn’t need polars to figure out that the sails need
tweaking
or trimming. (snip) I’m sorry but a cruising
sailor needs polars about as much as a fish needs an umbrella.
(snip}Yea, Yea, Yea, Yea - It’s beginning to sound like an issue on
rec.boats.
You sure your name isn’t Capt Neal?
…snip…Ack! If that idiot starts posting here, along with the recent
spate of
spam from tessa_whoever, I’m gonna stop lurking!Frank
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