Low stretch rope

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Garry R

Low stretch rope

Post by Garry R » Tue Mar 24, 2009 3:16 pm

I have seen many references to "low stretch rope" for use as a main halyard but what specification do the members understand by this definition? Dyneema etc and what thickness for a main halyard on a Merlin or Firefly?

Rupert
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Re: Low stretch rope

Post by Rupert » Tue Mar 24, 2009 3:34 pm

I've used dyneema in the past (4mm) and it seems OK, though it does stretch a tiny bit. My new mast came supplied with a Kevlar halyard, which has no stretch at all to worry about, but hates knots and can go BANG with no warning. Mine hasn't yet, but I must cut 2 inches off the end to move the stress points.
Rupert

ACB
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Re: Low stretch rope

Post by ACB » Tue Mar 24, 2009 3:46 pm

(puts hand up sheepishly...) F3000 has 3mm Dyneema halyards as of the start of last season and F3163 has wire. There is no difference between them that I can detect*, so far as stretch goes, but the Dyneema is notably easier to deal with.

* I am something of a coarse dinghy sailor, however.
Last edited by ACB on Tue Mar 24, 2009 6:25 pm, edited 1 time in total.

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Ian Malcolm
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Re: Low stretch rope

Post by Ian Malcolm » Tue Mar 24, 2009 5:09 pm

3mm Marlow D12 dyneema works well for a main halyard on my Albacore. If I had gone for V12 Vectran, I'd have a lot less initial creep, but the D12 is acceptable. Its sleeved with the jacket off some ordinary braided rope for a couple of metres in the middle for ease of handling when sweating it up the last fraction of an inch and cleating it. I'd never go back to a wire main halyard.
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Garry R

Re: Low stretch rope

Post by Garry R » Tue Mar 24, 2009 5:15 pm

I must cut 2 inches off the end to move the stress points.
Thanks for the tip Rabbi Rupert!!!!

Garry R

Re: Low stretch rope

Post by Garry R » Tue Mar 24, 2009 5:32 pm

Have found it at 95p/metre plus postage. Anyone know if you can get it cheaper than this without going the whole hog with a 100m roll?

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Nessa
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Re: Low stretch rope

Post by Nessa » Tue Mar 24, 2009 7:11 pm

I am told I will be looking for some 3mm stuff when I fit the contender with the external halyard (at the bottom of the 'to do' list) but I have been warned against using the same stuff for the trap wires. I may though do the very end bit of the halyard ie the bit that goes as far as the cleat, in wire to be on the safe side, in which case I will do something more skin friendly for the pulling up bit.
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Garry R

Re: Low stretch rope

Post by Garry R » Wed Mar 25, 2009 11:11 am

Try this - good price and no carriage that I am aware of. I mailed him and had a prompt reply so that was a good start.

http://www.sailingmad.com

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Nessa
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Re: Low stretch rope

Post by Nessa » Wed Mar 25, 2009 10:03 pm

How coincidental - I also ordered my stuff from him last night via ebay!
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Graham T
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Re: Low stretch rope

Post by Graham T » Wed Mar 25, 2009 11:08 pm

That's Bob the Albacore.... He wanted to re-string his Albacore but didn't want to pay chandlery prices. In order to get to what he wanted to pay per metre he had to have a container load made!
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