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post #21 of 44 Old 03-27-2007
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Here is the link to Profurl which shows the wrapstop/preventer.
Not a real good picture.

http://www.profurl.com/us/produits/basic.htm
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post #22 of 44 Old 03-27-2007
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I found two more images - one clearly shows a pad-eye, of sorts.





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post #23 of 44 Old 03-27-2007
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TB-

Unfortunately, wire halyard sheaves are often too narrow and the wrong shape to accept rope halyards. Wire halyard sheaves usually have a v-shaped groove rather than the u-shaped groove needed by rope halyards.

So if you want to replace the wire-to-rope with all rope, replacing the masthead sheaves is usually necessary.

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post #24 of 44 Old 03-27-2007
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TB - Although the second one is hard to make out in your picture I believe you already have 2 (for your 2 possible forsails) of what I thought was considered 'jib halyard wrap preventers'. Simply those approx 2 inch long U shaped tunnels (over sized fairleads) bolted to the top front of the mast above the upper furler bearing that the halyards pass through to keep the jib halyards from flopping around during a poor furl. I've never seen or heard of ProFurls (I assume proprietary) method of keeping things in line before. To me they look a bit micky mouse (and expensive) - but maybe they are more foolproof
As for replacing the meat hook makers... that's the first thing I did last spring. I was amazed at Nauticat's antiquated wire on my '99. Although using the existing sheaves may not be the absolute 'right' thing to do.... I'm not worried really about it. They work fine, it's been a year, I'll watch for extra wear, and when I go up there this year I'll look for halyard dust as a possible wearing problem indicator.

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post #25 of 44 Old 03-27-2007
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Stan,
Until Faster pointed that out earlier in this highjacked thread, I never realized what they were used for. The PO had both jib halyards outside of these wrap preventers (one halyard's actually intended for use with a spinnaker or staysail).

Consequently, when the masts were unstepped in '04 after our purchase of the boat, we didn't thread them through. It seems as though the U-brackets need to be unscrewed to do so, since the shackles will certainly not fit.

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post #26 of 44 Old 03-27-2007
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That U-shaped fairlead near the mast head is essential to keep the 10 degree angle needed between the halyard and the foil to prevent wire wrap. You have to keep an eye on them with wire halyards, as the wire cuts through them. I caught mine about half way through.
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post #27 of 44 Old 03-27-2007
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No Hijackers Here

I don't consider talking about the details of your's, mine, or anyone else's halyard and furling systems 'off topic' in a 'Jammed Furler' thread. If you don't know exactly how and why your system works then the idea is to learn about it - Before it Hits the Fan

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post #28 of 44 Old 03-27-2007
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But halyard wire wrap is one of the common causes of a jammed furler...
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post #29 of 44 Old 03-27-2007
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Quote:
Originally Posted by Idiens
But halyard wire wrap is one of the common causes of a jammed furler...
I'm not quite sure if this was a timing issue or who or which post this refers to. If it is 'wire' in particular my answer is - get rid of it - as it serves no purpose that the current breed of low stretch lines can't do better. Again I'm not saying to do it as I did without changing the sheaves but between Meat Hooks and Kinking... just make it go away......

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post #30 of 44 Old 03-27-2007
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I've got more time - actually had to do some office work . . . some clients need to get their priorities straight.

I looked closer at some masthead photos I had taken and now have a clear understanding of what went wrong. Thanks guys for the help - still learning after all these years.

Fortunately, the SS U-shaped halyard fairleads are not riveted to the mast. Those beefy roundhead screws seem easy enough to remove. However, with a second look, there is a U-shackle with a clevis pin connected to the snap shackle, which can be unscrewed, allowing the wire end to slip through the fairlead without unscrewing.






Also see two signal lines already strung through the fairleads. Will they interfere with the wires? Looks like I'm going aloft in a couple weeks, after launching.

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Last edited by TrueBlue; 03-27-2007 at 02:04 PM.
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