Cunningham doesn't flatten the sail - moves the Max draft fore & aft.
Outhaul flattens lower part (1/3?) of the main ; Backstay tension flattens the upper (2/3?)
sam :-)


From: Brent Driedger
Sent: Tuesday, December 17, 2013 5:14 PM
To: cnc-list@cnc-list.com
Reply To: cnc-list@cnc-list.com
Subject: Re: Stus-List Old Sails Suck

I have a 3DL genny , love it and intend to replace my main with one once I have a few boat units to spend. I would think that dispute the inability of the string sail to change factory shape based on tensioning, I should still be able to flatten it out with the Cunningham once the wind comes up. If not I'll be replacing my main with a Dacron sail. I like having some gears to shift to as the wind increases prior to reefing. 

Brent Driedger
27-5
s/v Wild Rover
Lake Winnipeg

Sent from my iPhone

On Dec 17, 2013, at 5:09 PM, niall buckley <niall.j.buck...@gmail.com> wrote:

Even if the sail itself doesn't stretch, adjusting the luff tension
alters the performance of the sail, desirable in changing wind
velocities and different sea conditions. There should be a YouTube
video to demonstrate.......I'll take a look. Do you have an expert
sail guy in your area; in the business, for example making sails ?
That would be another resource for you.
Best Regards,

NJB CnC41, Halifax.


On Tue, Dec 3, 2013 at 10:06 PM, <sam.c.sal...@gmail.com> wrote:
I've got the book, one of many, and I understand and am an obsessive sail trimer. What I don't understand, yet, is what pulling the halyard on a sail that doesn't stretch do?
sam :-)


From: niall buckley
Sent: Tuesday, December 3, 2013 5:59 PM
Subject: Re: Stus-List Old Sails Suck

Sam,
If you are really interested in this,(and you should be, if you want to get the most pleasure from sailing your vessel),
find a copy of "sail power".
Halyard tension, backstay,lead position,boom downhaul etc are the gears that accelerate your boat.
I'm writing on Wellness and Anti Aging now, so find the Book.


On Tue, Dec 3, 2013 at 8:05 PM, <sam.c.sal...@gmail.com> wrote:
If the shape is factory engineered, and they don't stretch, what is adjusting halyard tension going to do?
Tensioning the halyards on the old sails stretched the Dacron on the bias and moved the draft forward. It can't do that on the kryptonite one!
A bit more explaining please! 

sam :-)

From: niall buckley
Sent: Tuesday, December 3, 2013 4:31 PM
Subject: Re: Stus-List Old Sails Suck

The main difference is that the new sails dont stretch and their shape is factory engineered.
You will still adjust mail and genoa halyard tension according to conditions. You will likely
not ever require a Cunningham ever again.
Have Fun.


On Tue, Dec 3, 2013 at 9:28 AM, Hoyt, Mike <mike.h...@impgroup.com> wrote:
Meant to put this as an aside on Sam's thread.  New main and #1 on Koobalibra C&C115 this past summer.  The difference between these and the 6 year old sails is like high tech winter tires to bald tires in a snow storm ....


From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of sam.c.sal...@gmail.com
Sent: Tuesday, December 03, 2013 12:58 AM
To: cnc-list@cnc-list.com
Subject: Stus-List Halyard Tension

Reading the tread about halyards, and an earlier post about furlers reminded me to ask a question of you racers out there: -

I don’t race - only because there’s no-one racing on our lake. Although I have done a couple of Swiftsures.
But I like passing boats and hate it when boats pass me!
My boat has been pretty well upgraded with all rope halyards; new adjustable genoa cars; self tailers; new traveller; barbour haulers; and new Dacron sails 5 seasons ago.
I sail with a 135% genoa on a furler. While sailing I adjust the genoa halyard regularly to move draft in the sail as the wind changes. (I do the same with the main too!)
Now the question:
Late this season I bought a new high tech, Kevlar, carbon, kryptonite, 135% genoa.
I’m assuming I don’t adjust halyard tension with this new sail as I don’t think the sail will distort like a Dacron sail.
Similarly, when I buy a matching main, main halyard and Cunningham adjustment will become redundant. Am I correct with this assumption?
If this is correct, are there any trimming adjustments with these new high tech sails that I should become familiar with? Do you trim these newer sails any different than the old Dacron sails?
What new techniques do I need to absorb?
Thanks,
sam :-)
C&C 26  Liquorice
Ghost Lake  Alberta.


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