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Halyard width? |
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dohertpk 
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Joined: 28 Sep 12 Online Status: Offline Posts: 172 |
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 Topic: Halyard width?Posted: 19 Dec 14 at 9:19pm |
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Quick question this: 3mm or 4mm for a 600 halyard?
Cheers, Peter
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JimC
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Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662 |
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Posted: 19 Dec 14 at 9:32pm |
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3mm or 4mm what?
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dohertpk
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Joined: 28 Sep 12 Online Status: Offline Posts: 172 |
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Posted: 19 Dec 14 at 9:38pm |
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I was thinking Marlow Excel racing
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Paramedic
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Joined: 27 Jan 06 Location: United Kingdom Online Status: Offline Posts: 929 |
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Posted: 20 Dec 14 at 8:34am |
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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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NHRC
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Joined: 13 Dec 13 Location: Lymington Online Status: Offline Posts: 102 |
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Posted: 23 Dec 14 at 1:36am |
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If you buy Maffioli, Marlow or fse then a 3mm covered rope will have a braided core
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craiggo
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Joined: 01 Apr 04 Location: United Kingdom Online Status: Offline Posts: 1810 |
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Posted: 23 Dec 14 at 10:48am |
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Just use 4mm Kevlar
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NHRC
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Joined: 13 Dec 13 Location: Lymington Online Status: Offline Posts: 102 |
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Posted: 23 Dec 14 at 4:04pm |
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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
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Joined: 01 Apr 04 Location: United Kingdom Online Status: Offline Posts: 1810 |
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Posted: 23 Dec 14 at 4:14pm |
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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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Paramedic
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Joined: 27 Jan 06 Location: United Kingdom Online Status: Offline Posts: 929 |
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Posted: 23 Dec 14 at 6:32pm |
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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
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Joined: 13 Dec 13 Location: Lymington Online Status: Offline Posts: 102 |
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Posted: 24 Dec 14 at 4:45am |
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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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