Dinghy development: Halyard width?

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Halyard width?

Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=11818
Printed Date: 09 Jul 25 at 4:00pm
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Topic: Halyard width?

Posted By: dohertpk
Subject: Halyard width?
Date Posted: 19 Dec 14 at 9:19pm

Quick question this: 3mm or 4mm for a 600 halyard?

Cheers,

Peter

Replies:

Posted By: JimC
Date Posted: 19 Dec 14 at 9:32pm

3mm or 4mm what?

Posted By: dohertpk
Date Posted: 19 Dec 14 at 9:38pm

I was thinking Marlow Excel racing

Posted By: Paramedic
Date 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.).

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Posted By: NHRC
Date Posted: 23 Dec 14 at 1:36am

If you buy Maffioli, Marlow or fse then a 3mm covered rope will have a braided core

Posted By: craiggo
Date Posted: 23 Dec 14 at 10:48am

Just use 4mm Kevlar

Posted By: NHRC
Date 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

Posted By: craiggo
Date 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.

Posted By: Paramedic
Date 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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Posted By: NHRC
Date 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.