[Public-list] Furler/forestay halyard wrapping

[sousa, stephen (ENG)]

J,

You are experiencing halyard wrap which is not uncommon. On Profurl the tang
intersects at the top of the foil that stops the top of the bearing from
rotating. If you haven't contacted Harken, they may be able to offer some
suggestions. I had this same problem with an older furler which was
discarded when the wire halyard snapped.

Stephen 

-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of J Bergquist
Sent: Thursday, July 22, 2004 10:42 AM
To: 'Alberg 30 Public List -- open to all'
Subject: RE: [Public-list] Furler/forestay halyard wrapping


Eddie-

I have been up my mast 8 times in the past 3 weeks. I have looked closely at
my forestay and have not noticed any wire separation, so I don't think this
is a problem for me. I am not sure why I don't have this problem. Actually,
you're making me think maybe I should go back up and check before I pay with
a fallen mast...

However, I am not sure how the halyard snagging on the headfoil would unwind
the forestay? Maybe your furling system is a little different than mine. I
have a harken furler. Mine works by a drum at the base of the forestay which
has a slot that a headfoil track fits into. At the head of the sail, there
is a bearing which can spin around the headfoil. What happens when you have
the sail hoisted is the drum turns the foil/track and this rolls up the jib.
The bearing which is attached to the head of the sail has 2 parts: one which
is attached to the halyard, which does NOT spin, and a second which is
attached to the head of the sail, which spins with the foil. What was
happening when I snagged the halyard was that a sharp edge on the spinning
foil would catch on the halyard (which is NOT supposed to spin) and this
would prevent the foil/track from rotating. The reason this occurs is
because the lead for the halyard allows the line to be too close to the
foil. As I mentioned, I alleviated this problem by covering the halyard with
a piece of shroud roller (basically, small pvc pipe), which cannot be
snagged because it's not fibrous. The sharp edge on the end of the headfoil
doesn't snag it, so the foil rotates cleanly and the sail rolls up while the
halyard doesn't snag. 

Nowhere in the mix does the forestay have any twisting moment applied to it.
Even if the halyard snags, since the foil just rides over the forestay,
there's nothing to snag it. 

My best guess on why I never had this problem before in 2 years of use is
that there used to be a black plastic cap which covered the outside of the
foil/track and which prevented the sharp edge of the track top from touching
the halyard. I think this piece was glued on and the glue failed so it
started to slide down over the track. This resulted in the sharp edge being
exposed and the halyard snagging. That's just a theory.


Boy a picture sure is worth a thousand words!

Kind regards,

J Bergquist
Calliope #287

-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of EddieDiver at aol.com
Sent: Thursday, July 22, 2004 9:29 AM
To: public-list at alberg30.org
Subject: Re: [Public-list] Furler/forestay halyard wrapping

What about the "fact" that with the separation of the 19 strands you may

have lost 50% of the wire strength? I went aloft and took a digital picture
of  
the wire separation. One can see light between the wires. The 3 riggers said

that as the forestay flexes when the boat hits waves or a gust of wind
forces  
the forestay to pull harder, the wires will work harden and become brittle. 
When  the first of the wires break, all is lost.
 
 Ed. Schroeder
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