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Masthead Question

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Initially Posted - 05/02/2010 : 20:00:01

I lowered my mast this weekend with the intent of moving my forestay from the front pin to the next pin back so I could use the front pin for the halyard for my asymmetrical spinnaker. I have external halyard with two sets of dual sheaves. There is a cross brace forward of the forward sheaves that would appear to interfere with accomplishing this. Can anyone offer some suggestions on how I can convert my existing setup so the foresail halyard is forward and the forestay is behind? Foreward is to the right in the picture below.

Joe Wergers
Utopia
Fleet 7/Oceanside, CA
78 C25 FK/SR #381

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Bill Holcomb
Admiral

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USA
769 Posts

Response Posted - 05/03/2010 : 06:10:36

Hi Joe,
Actually, the forestay should have been in the pin that you want to use. The most forward pin was designed to hold the spinnaker halyard block's shackle.
Bill Holcomb - C25 Snickerdoodle #4839

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Response Posted - 05/03/2010 : 07:04:02

My intent was to use the jib halyard for my spinnaker as I have a CDI furler which makes that halyard unnecessary.

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Sloop Smitten
Master Marine Consultant

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1181 Posts

Response Posted - 05/03/2010 : 11:24:16

So I went back and did some reading and it appears while you can use your jib halyard for a spinnaker halyard you cannot use the existing halyard sheaves but need to reroute the halyard so it goes vertical fore of the mast up to a block attached to the foreward pin. Correct?

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JimB517
Past Commodore

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USA
3285 Posts

Response Posted - 05/03/2010 : 13:05:21

The spinnaker halyard block must be a swivel block and must be on that most right pin, with the forestay behind it.

That is, if you intend to every gybe the asym!

Buy a strong swivel block because the force can be huge.

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Response Posted - 05/03/2010 : 14:00:21

I understand that. My question concerns the routing of the halyard prior to reaching the swivel block. Can the existing mast halyard sheaves be utilized.

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islander
Master Marine Consultant

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USA
4024 Posts

Response Posted - 05/03/2010 : 14:58:18

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">So I went back and did some reading and it appears while you can use your jib halyard for a spinnaker halyard you cannot use the existing halyard sheaves but need to reroute the halyard so it goes vertical fore of the mast up to a block attached to the foreward pin. Correct<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
I believe this is correct. The halyard has to be taken off the sheave and put on the new swivel block. And while your at it spring for a new masthead light. That one is lookin' prty shabby

Edited by - islander on 05/03/2010 15:04:05

Bill Holcomb
Admiral

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USA
769 Posts

Response Posted - 05/04/2010 : 07:05:06

Hi Joe,
It looks like your halyards are all rope - - so, yes, it will work to route the existing jib halyard through the spinnaker block. The halyard may experience chafe from the casting piece that is forward of the sheeve and/or from the top of the forestay. So, check for chafe frequently.

Bill Holcomb - C25 Snickerdoodle #4839

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aeckhart
Master Marine Consultant

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USA
1709 Posts

Response Posted - 05/04/2010 : 11:52:19

You cannot use the existing sheeve for your spinnaker unless you exit the halyard some distance below the mast head. To do this you'd have to select a location, probably a foot or so down the mast, drill a hole large enough for the halyard, and elongate it so the line can run freely up to the spinnaker block without chafing n the top edge of the hole. Then you have to fish the halyard down to the hole and out. The problem is compounded if your wiring is run through a PVC tube in the front part of the mast as most of the newer boats are.

In short, a huge hassle. I thought about it and settled for an external halyard for my assym. Its the only one on the boat that runs this way. I have three others that run in the mast, main and two genoa halyards.

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