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Re: spinnaker pole bridles [Re: Rhapsody #348] #10449
11/02/10 07:47 PM
11/02/10 07:47 PM
Joined: Aug 2010
Posts: 26
honeymoon bay b.c.
Z
zeppo Offline OP
Senior Member
zeppo  Offline OP
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Z
Joined: Aug 2010
Posts: 26
honeymoon bay b.c.
I'm trying to find out if Mallorca has used a velcro wrap to attach the topping/downhaul rings to the spinnaker pole. If so has there been a problem with the wrap sliding back on the pole? I would never use a velcro wrap to attach the mainsheet to the boom.

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Re: spinnaker pole bridles [Re: zeppo] #10450
11/02/10 09:07 PM
11/02/10 09:07 PM
Joined: May 2007
Posts: 2,656
Portsmouth, RI
Rhapsody #348 Offline
Past J/30 Class President
Rhapsody #348  Offline
Past J/30 Class President
Joined: May 2007
Posts: 2,656
Portsmouth, RI
I found an old email about the center pick point from Clint Rand at Forte Carbon Fiber Products. Excerpts below.

Quote
The center point pick is simply two D rings lashed to the center of the pole. Typical trip line layout is to have both trip lines tied together and routed through the top center point pick ring, however, we have also built poles with separate trip lines ending about 2/3 of the way down the pole - so there is overlap in the center. We are happy to do either, but if not specified the customer would get the former. We offer vectran bridles in place of the center point pick for $100 additional.

Re: spinnaker pole bridles [Re: zeppo] #10451
11/03/10 06:54 AM
11/03/10 06:54 AM
Joined: Apr 2003
Posts: 649
Marblehead, MA
dbows Offline
Senior Member
dbows  Offline
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Joined: Apr 2003
Posts: 649
Marblehead, MA
The D rings are lashed tightly with line. There is enough texture from the carbon layup that tightly wrapped line gets a "grip" on the pole. The lashing is probably 2" wide so it has a pretty good footprint and spreads the loads.


David Bows
Mallorca - Hull# 397
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Re: spinnaker pole bridles [Re: zeppo] #10455
11/03/10 05:01 PM
11/03/10 05:01 PM
Joined: Oct 2009
Posts: 42
Seattle, WA
gmo Offline
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gmo  Offline
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Joined: Oct 2009
Posts: 42
Seattle, WA
On Slingshot, our bridal broke once sailing in around 25kts of breeze. We rigged up a ring to the center of the pole using some spare velcro. It worked, but it was damn scary watching the old aluminum pole flex with the gusts. I bet the tip of the pole was traveling a good foot with the up and down hauls on tight. I guess carbon fiber is stiffer, so doesn't flex as much (they use it on bow sprits, after all).

I wonder how much power you give up to pole flex, that would otherwise be sent through the bridal directly to the boat...


Grady Morgan
Slingshot - Hull #112
Re: spinnaker pole bridles [Re: gmo] #10456
11/03/10 09:36 PM
11/03/10 09:36 PM
Joined: Aug 2010
Posts: 26
honeymoon bay b.c.
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zeppo Offline OP
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zeppo  Offline OP
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Joined: Aug 2010
Posts: 26
honeymoon bay b.c.
the consensus seems to be that aluminum poles without bridles will bend at hotter angles in higher apparent winds, whereas carbon poles even if they deflect a bit are less prone to failure. Looks like it's back to bridles (or maybe a carbon pole) Just installed a Harken windward sheeting car/track so the pole will need to wait.

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