[C320-list] Tuning Hood jib furling - Sheet lead position

[Robert E. Sloat]

Scott-Thanks.  I am getting giddy thinking about the tape drive.  To make
things even more fun (and expensive), UK is making a loose footed Dacron
main for me.  The tape drive main was much more expensive and the folks at
UK said that the best hybrid design was tape drive headsail and Dacron main.

Bob Sloat
S/V Savannah Hull 894 (2002)
----- Original Message ----- 
From: "Scott Thompson" <surprise at thompson87.com>
To: <C320-List at Catalina320.com>
Sent: Sunday, January 08, 2012 3:06 PM
Subject: Re: [C320-list] Tuning Hood jib furling - Sheet lead position


> You will not believe the improvement in performance with that new
> tape-drive sail compared to the OEM 150%!
>
>
> On 1/7/2012 10:48 AM, Robert E. Sloat wrote:
>>
>> John-Except for deep running, the angle of attack of your sails to
>> apparent wind is the same. Angle of attack is the angle between the
>> apparent wind and the chord line of the sail. The angle of the boat to
>> apparent wind doesn't generally matter. So the important thing is the
>> angle of the sail to apparent wind.
>>
>> I would start with the halyard at the lower end of tension for the wind
>> conditions. More halyard tension moves draft forward. Also consider
>> fiddling with the Genoa sheet lead position. Move it aft to increase
>> sheeting effects on the lower part of the sail. The lead may be so far
>> forward that you are not distributing the load enough on the lower part
>> of the Genoa when sheeting it in. If the top leeward telltales on the
>> Genoa luff are stalling when you observe your problem then the Genoa
>> lead needs to go aft which will allow the top of the sail to fall off a
>> little reducing its angle of attack and the bottom of the sail to
>> tighten increasing its angle of attack. You want both the top of the
>> sail and the bottom to have balanced angles of attacks and the sheet
>> lead position is the best way to do this. The leading edge of the sail
>> and the furling mechanism should respond to the sheet tension and lead
>> positions.
>>
>> If you don't have the Garhauer E-Z Glide adjustable jib lead blocks
>> consider them. I got a set a few weeks after commissioning and it is one
>> of the best additions made to the boat.
>>
>> I leave the furling line loose enough for the tube to rotate as needed.
>>
>> Good luck with your Genoa. And let us know if this helped. I assume the
>> tape drive was built for the boat.
>>
>> PS-I have a UK tape drive Genoa on order for the upcoming season and am
>> getting excited about playing with it and hopefully observing
>> improvements over the OEM Catalina 150 that came with the boat.
>>
>> Bob Sloat
>> S/V Savannah Hull 894 (2002)
>> ----- Original Message ----- From: <jpmesa at aol.com>
>> To: <c320-list at catalina320.com>
>> Sent: Tuesday, January 03, 2012 3:33 PM
>> Subject: [C320-list] Tuning Hood jib furling
>>
>>
>>
>> I am havinga problem getting the front edge of my 1995 Hoodjib furling
>> sail
>> to line up right. The front edge ofmy UK tape drive seem to settle in
>> atabout 45* angle to the helm which is ok for running and broad reach but
>> notwhen I heading up wind. Ican walk forward and twist the furling tube
>> aft
>> to line up nicely but as soonas I let go it will fall back to the same
>> position. When sailing up wind I tighten the sheet to about an inch or so
>> offthe spreader (depending on the wind) butI think I could point a few
>> degree higher if I can work out this problems. Anyideas ? I have played
>> with my furling line locking it off in different settings but that didn't
>> seen to help.
>> Thanks John Holokai 2
>> PS: Itlooks like the very top of the jib seem to line up OK and then the
>> sail twistoff as you follow it further down the tubes.
>>
>
> -- 
> Scott Thompson
> Surprise, #653
>