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Halyard width?
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dohertpk View Drop Down
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    Posted: 19 Dec 14 at 9:19pm
Quick question this: 3mm or 4mm for a 600 halyard?

Cheers,
Peter
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JimC View Drop Down
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Posts: 6662 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 14 at 9:32pm
3mm or 4mm what?
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Posts: 172 		Post Options Post Options   Quote dohertpk Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 14 at 9:38pm
I was thinking Marlow Excel racing
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Paramedic View Drop Down
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Posts: 929 		Post Options Post Options   Quote Paramedic Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 14 at 8:34am
4mm. if you feel technical you can taper it down just above the cleat point.

the 3mm is strong enough but the core is (or always was, i don't think they have changed it) twisted rather then braided and therefore stretches more than the 4mm which does have a braided core (Hence why it can be tapered.).


Edited by Paramedic - 20 Dec 14 at 8:36am
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Posts: 102 		Post Options Post Options   Quote NHRC Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 14 at 1:36am
If you buy Maffioli, Marlow or fse then a 3mm covered rope will have a braided core
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Posts: 1810 		Post Options Post Options   Quote craiggo Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 14 at 10:48am
Just use 4mm Kevlar
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Posts: 102 		Post Options Post Options   Quote NHRC Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 14 at 4:04pm
Don't use Kevlar... It's too prone to damage... Kevlar hates salt, uV and friction. Dyneema is much better
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craiggo View Drop Down
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Posts: 1810 		Post Options Post Options   Quote craiggo Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 14 at 4:14pm
Apart from Herzog halyards on my 49er, I've run 4mm Kevlar halyards on all my boats since 2000 and have suffered very few breakages and it doesn't stretch like dyneema.
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Posts: 929 		Post Options Post Options   Quote Paramedic Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 14 at 6:32pm
I have to say that when you could get it kevlar was very, very good and didn't stretch or shred the outer jacket like the Dyneema (Spectra) of the time. I was still using it long after most club members, and you do still see the odd boat with one.

Things have moved on these days, all the modern dyneema products from recognised leading manufacturers have an sk78 core and most performance boats use a 2:1 main halyard so creep and outer shredding are virtually eliminated. I'd still use wire if you like to use tons of cunningham personally as no rope is perfect and you can't get much more positive than wire and a hook rack or lock, especially if the boat is set up for it already.
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NHRC View Drop Down
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Posts: 102 		Post Options Post Options   Quote NHRC Quote  Post ReplyReply Direct Link To This Post Posted: 24 Dec 14 at 4:45am
Dyneema comes in various types. Make sure you are using the correct core. I use SK 99 2.5 mm on my 2:1 job halyard with no stretch.
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