[Rhodes22-list] Too Windy--Now Centerboard Effect

Fri Jun 26 09:44:56 EDT 2009

Last night I measured degrees to the wind with the Genoa both fully deployed
and also furled to the shroud in what I'd thought were identical conditions. 
Can't say that I learned which points better but I did learn to quit
measuring things.

For all tacks:  poptop and boom up, full main, no significant chop, speed of
the current looked minimal, singlehandler with weight centered, tiller
locked three degrees into the wind (see exception below), traveler centered,
centerboard down, sheet lead blocks back to the winches, telltales flowing
(not visible with reefed Genoa).

Furled Genoa to outer shroud:  110 degree tack (pointing 55 degrees), speed
2.4 knots on starboard tack and 2.9 knots on port tack, apparent wind speed
7.8 knots for both.  Mainsail remained the same on both tacks.  The heel was
less than 5 degrees on both tacks.

175% full Genoa:  120 degree tack (pointing 60 degrees), speed 3.8 knots on
starboard tack and 2.2 knots on port tack, apparent wind speed 7.3 knots on
starboard tack and 4.9 knots on port tack.  For the starboard tack I needed
to pull the mainsheet in tighter and move the tiller from 3 degrees into the
wind to about 5 degrees off the wind to keep the telltales flowing properly. 
The heel on the port tack was about 5 degrees but the heel on the starboard
tack was over 10.

So what did I learn?  Not exactly sure.  Obviously the conditions or my
description of the conditions were not consistent.  From the huge variance
in apparent wind it looks like the strength of the wind changed, but if it
did I don't think it was by much.  Per Rummy's comment about railmeat, the
135 lb. outboard with the extra Genoa caused the boat to heel more which
caused the trim to the mainsail and tiller which all caused a speed
increase.  I'm guessing that the 60 degree pointing was more like 50 degrees
on the starboard tack and 70 degrees on the port tack, but who knows.

I came off the wind to a close reach of about 75 degrees and raised the
centerboard and speed immediately jumped to over 4 knots, which makes me
think the wind speed may have increased some during my measuring. 

Any other theories are certainly welcome.

By the way, it was a most excellent sail, which is all that matters.

One other condition that I failed to mention was that I was stone sober.

Lee

Rick-139 wrote:
> 
> David,
> 
> Putting the meat and rum as far forward as it will go helps a lot.
> 
> Rick
> 
> On Thu, Jun 25, 2009 at 1:51 PM, David Culp <dculp at hsbtx.com> wrote:
> 
>> Agree with Rummy... The 175 requires the right conditions and bodies.
>> Still, for most people, I think it is the right sail to have on the
>> furler if you have some rail meat.  But, since I am always
>> single-handed, I am dropping back to a 150 or 155% the next time
>> around.  The 175% stays rolled up on my boat too much of the time.
>> However, my experience is that the boat will point higher with the
>> 175% fully unfurled then it will reefed down to the the outer shroud.
>>
>> My best pointing/speed combination single-handed seems to be:  Full
>> main, boom lowered, genoa sheet inside the outer shroud and
>> centerboard down.  Also, traveler a little to windward if not
>> over-powered.   This would be in wind of about 12-15 kts.  I estimate
>> the angle to the wind at about 45 degrees... Might do better with a
>> newer genoa sail and a luff tape.  I have tried sheeting in to the
>> inside cleats on the cabin top, maybe point a little closer but lose
>> too much speed.  In a big blow though, this might be useful.
>>
>> Anybody using a 150 or 155% genoa and know the dimensions?
>>
>> Thanks,
>> David
>>
>>
>>
>>
>> Date: Wed, 24 Jun 2009 11:44:58 EDT
>> From: R22RumRunner at aol.com
>> Subject: Re: [Rhodes22-list] too windy--Now Centeboard Effect
>> To: rhodes22-list at rhodes22.org
>> Message-ID: <d63.38baecb0.3773a3fa at aol.com>
>> Content-Type: text/plain; charset="US-ASCII"
>>
>> Lee,
>> As you have eluded to previously, there are a lot of factors that
>> determine
>>  hull speed in the water. If you are single handed, the 175 can be way to
>> much  sail in a ten knot wind.  However, with the same conditions and two
>> additional bodies on the rail can make the 175 a real performance
>> booster.
>> It's all about balance, sail and weight.
>>
>> Rummy
>>
>>
>> In a message dated 6/24/2009 11:09:03 A.M. Eastern Daylight Time,
>> LKUHN at cnmc.org writes:
>>
>>
>> Ben,
>>
>> The only time I can remember measuring performance  into the wind I had
>> the
>> sheets run across the cabintop.  12 knot wind,  boom & board down, full
>> main,
>> traveler centered, Genoa reefed to the  inside shroud, tiller locked,
>> choppy
>> water.  It's in the archives but  I think I was going about 3.5 knots,
>> which
>> was fast for me on a close reach  with that much wind--probably because
>> the
>> boat was sailing itself.  I  measured 45 degrees into the wind which
>> leads
>> me
>> to believe that an  experienced sailor could get upwards to 40 degrees on
>> a
>> close haul in the  right conditions.
>>
>> I normally have the Genoa sheets ran outside the  shrouds but I mostly
>> sail
>> on a close reach and I'd probably get faster  performance with the sheets
>> ran
>> across the deck in between the  shrouds.  Unless I'm on a beam reach or
>> more
>> off the wind, it's rare  that the full 175 decksweeper seems to add much
>> speed.
>>
>> Switching the  sheets to different leads is easy on the windward side
>> with
>> the poptop  up.  I haven't figured out how to comfortably do it yet with
>> the
>> poptop down unless I pull in all the  sails.
>>
>> Lee
>> __________________________________________________
>> To subscribe/unsubscribe or for help with using the mailing list go to
>> http://www.rhodes22.org/list
>> __________________________________________________
>>
> __________________________________________________
> To subscribe/unsubscribe or for help with using the mailing list go to
> http://www.rhodes22.org/list
> __________________________________________________
> 
> 

-- 
View this message in context: http://www.nabble.com/Re%3A-Too-Windy--Now-Centerboard-Effect-tp24208274p24220585.html
Sent from the Rhodes 22 mailing list archive at Nabble.com.