[Rhodes22-list] 175 Genoa

[Leland]

Rex,

The 4.6 knots was true wind.  I think the apparent wind was a little above 6
knots.

I posted this last week:  "The fastest I made it the rest of the day was 1.3
knots on a close reach with an apparent wind of 3 knots with the 175 genoa
all the way out.  At 50 degrees, that would calculate to a 2.38 true wind. 
The white sail of the genoa was inflated but the UV protector was flopped
over.  I furled the genoa in until the UV protector flew straight back with
the rest of the sail, which brought the headsail down to about 90%.  My
speed:  still 1.3 knots.  My assumption:  If you haven't enough wind to blow
that UV strip straight back, you've got way too much genoa out."

If you have almost nonexistent wind and you're on a run, it seems like you'd
want as much sail out as possible to catch any little bit of wind.  If
you're on a close reach, extra sail may slow you down because it would be
fighting the aerodynamics.  Your boom keeps the mainsail somewhat taught and
it shouldn't hinder the aerodynamics nearly as much, so it might make sense
to sail on main alone on a close reach with little wind.

Of course, I could be totally wrong.  Since I seem to be trying to sail in
no wind all the time, I'll put your theory to the test next time I'm out.

Lee





CRex wrote:
> 
> Leland:
>        Your numbers bear out my opinions on the 175's effectiveness---as
> does your comment about asthetics although I would have thought the 4.6
> number would have been nearer 7 or 8.   One measurement I had hoped to do
> before the season ended (yes....Bow vs. Wave was officially winterized
> last week), was whether the 175's deployment in light winds while running
> is really counterproductive.  During 3 races where there were
> light-to-nonexistent winds this past year, I actually finished better with
> the 175 furled and using only the main.  However, this is an opinion based
> upon how I placed against other sailboats and not based upon a measured
> speed.  Any comments?
>          I apologize for not checking the achives (Ed, I'm busy composing
> this email) but what's the ideal whisker pole arrangement for the 175?  
> I've ruined two 12' boat hooks trying to use them as whisker
> poles---because they are cheap!  Has someone found a reasonably priced
> whisker pole on the market that will work for the Rhodes22?   If so, where
> is the ideal attachment point?  
>   Rex 
> 
> Leland <LKUHN at cnmc.org> wrote:
>   
> Art & others,
> 
> I still wouldn't give up my 175, but after testing its speed in several
> conditions, I was surprised at how little of a difference it makes.
> 
> On close and beam reaches, it looks like you need over a 3 knot true wind
> to
> fully inflate it. If it's not fully inflated, you'll go just as fast with
> about half as much headsail. If the true wind is over 6 knots, you start
> increasing your speed by reducing headsail and decreasing heel. In the
> middle of the 175's ideal zone (4.6 knot true wind) on a close reach, my
> speed was only reduced from 3.5 knots to 3.2 knots by reducing the genoa
> to
> the outside shroud (about 115%).
> 
> Wing-on-wing on a run without a whisker pole and it's difficult to keep
> the
> big 175 completely inflated.
> 
> I haven't checked the speed difference on a broad reach. I assume you
> might
> be able to pick up a little additional speed, but I can't imagine that
> it's
> more than half a knot from a 135 or 155 genoa.
> 
> Speed isn't everything, and the big 175 can sure look pretty.
> 
> Lee
> 1986 Rhodes22 At Ease
> Crab Alley (Kent Island, MD)
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