Theoretical hull speed is not a limit, it is a "sweet-spot". You can go
faster, but it takes exponentially more effort to do so. An example of
this is that when motoring in calm water, you reach hull speed with the
motor running at 1/4 throttle. To gain maybe .5 - 1 more knot of speed,
you must increase the engine to full throttle.
Also be aware of the difference between SOG and STW.
Bill Bina
On 8/25/2015 12:39 PM, Joel Aronson via CnC-List wrote:
Nat Herreshoff spoke at my YC when I was a kid. He said he did not
believe in hull speed as a limit. More sail or more wind equals more
speed.
I was doing more than hull speed (7.3) while cruising on a reach last
weekend and have done over 8 knots in flat water with the chute.
Joel
35/3
Annapolis
On Tue, Aug 25, 2015 at 12:27 PM, Sam Salter via CnC-List
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
It's theoretical - in real life you can push it a bit!
sam :-)
*From: *Indigo via CnC-List
*Sent: *Tuesday, August 25, 2015 10:24 AM
*To: *cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
*Reply To: *cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
*Cc: *Indigo
*Subject: *Re: Stus-List C&C 26 Sail Plan Thoughts!
According to the formula 1.34 x square root of lwl the theoretical
max speed of my 35mkIII with an lwl of 28ft is 7.06 knots. I'd
love to know how to get it going at higher speeds without surfing
down the back of a wave!!
--
Jonathan
Indigo C&C 35III
SOUTHPORT CT
On Aug 25, 2015, at 08:55, Jerome Tauber via CnC-List
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
8 knots in a C&C 26 with no current on a reach with white sails
in 12 knots of wind? Sounds more like a 30 one design. Jerry.
C&C 27 V J&J.
Sent from my iPhone
On Aug 25, 2015, at 12:15 AM, David Donnelly via CnC-List
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
I will preface this by saying I consider myself a beginner hack
sailor.
I have often thought about trading my 135 for a 110. The 26 is
tender for sure and I get plenty of grief from my bride whenever
we go past 20 degrees. I often furl or reef the main when she is
on board, and although performance increases the more upright we
get, pointing is severely reduced. My favorite sailplan for over
12 kts is reefed main and full genoa. I do think my boat feels
right at 20 to 25 degrees hard on the wind. I have found a
bubble in the main to be faster when the wind picks up. Again, a
hack playing and watching the speed.
I have a harken traveler and I do have a split and adjustable
backstay.
I have never acheived the speeds you get. I saw over 7.3 kts
once on the display while reaching but as I keep a Navionics log
on my tablet as well it showed only 6.9 per the gps so I count
that as my max speed.
When I get new sails I am getting a 110 and perhaps 2 reefs in
my main instead of the one I currently have. I think we're on
the same page.
David Donnelly
C&C 26 Mistress
Sent from my Samsung device
-------- Original message --------
From: Sam Salter via CnC-List <cnc-list@cnc-list.com
<mailto:cnc-list@cnc-list.com>>
Date: 08-24-2015 8:34 PM (GMT-07:00)
To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
Cc: Sam Salter <sam.c.sal...@gmail.com
<mailto:sam.c.sal...@gmail.com>>
Subject: Stus-List C&C 26 Sail Plan Thoughts!
I know there’s a few 26 owners on here so thought I’d share my
thoughts on optimizing my sail plan.
Jump in anyone, I’m open to any thoughts!
Was out sailing today, only boat on the lake – I love that! So I
thought we’d play around with the sail plan.
Wind was 8kn -12kn. (Estimate – I usually think if I see the
occasional whitecap it’s around 10kn)
I have a 135% laminate genoa from Evolution Sails in Toronto (2
seasons). A Dacron main with 2 full and 2 partial battens from
Leiche & McBride in Vancouver (5 seasons).
I have a flexofold prop; 4-1 outhaul; Garhauer genoa cars;
Harken traveller; Cunningham; Garhauer ridged vang; (no backstay
adjuster)
The C&C 26 is a tender boat and we were doing about 5.5kn to 6kn
beating to windward at 20deg – 25deg heel. Flattening with the
outhaul reduced heel a bit. (speed measured with a Speed Puck)
Furled the genoa to about 110%. Just brought the leech forward
of the spreaders so no interference.
Boat stood up to 13deg to 16deg. Speed was between 5.8kn –
6.4kn. Went up to 7kn or 8kn in the puffs (theoretical hull
speed is 6.2kn) No bubble in the luff of the main.
Obviously, the furled genoa wasn’t setting great and the
starboard tack was better than port tack. On a beam reach I
think she’d do 7kn or 8kn regularly.
So here’s my thoughts:
I’m thinking of getting the genoa recut to a 110% or if that’s
not practical (...and I suspect it isn’t) order a new 110%.
Eventually a new laminate main will be needed too!
I’m well pleased with 6+kns at 10kn of wind and 16deg angle of
heel. Very little weather helm
I’ve not tried it yet with the genoa at 110% in light wind. In
heavy air the main can still be reefed (...as could the 110%).
OK guys, am I missing something?
(I’m not looking for advice on where to buy used sails!)
sam :-)
C&C 26 Liquorice
Ghost Lake Alberta
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--
Joel
301 541 8551
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