Have had problems recently. Having looked in all the catalogues I am now totally confused, we seem spoiled for choice (D12, V12, Holt ultraline etc). !What is the best non stretch rope to use - 2-1 or single part?
Posted: 01/07/2007 21:00:31
Marlow D12 or Holt proline are sufficiant. Marlow V12 / Ultraline is an unecessary expense.
Posted: 01/07/2007 21:27:09
By: Chris M
My current main halyard looks strong enough to moor a battleship - what diameter/gauge do I actually need?
Posted: 02/07/2007 10:53:04
I have 4mm for my halyard
Posted: 02/07/2007 11:15:04
By: Garry R
Most people are using 4mm Excel Racing or equivalent. Does not need the ultimate in low stretch and the loading is not excessive either - how hard do you pull on the cunningham? Not more than 40kg max and likely no more than an inefficient 4:1 purchase so 160kg max static load and double it for breaking strain (or 1600 newtons for the engineers if memory serves). Excel racing will do the job.
Posted: 02/07/2007 15:54:39
By: Andrew M
The D12 i use is 3mm. I use a similar setup to the old Jon Turner CTs with a wire halyard in that i have the load taking bit as D12 and then a spliced on tail which is whatever is cheapest. The D12 is tensioned with a 2:1 purchase at deck level to (usually!) stop it slipping which is a real problem with conventional Spectra/Kevlar halyards.
Posted: 02/07/2007 17:08:32
By: Chris M
(long time no post!Rather than the cunningham, I find that the kicker tension is the thing that pulls the head of the main down. I have no idea what the tension a 16:1 kicker full on is and what actually gets converted to downward force, but it is often enough to make halyards slip through slightly worn cleats.
Posted: 02/07/2007 20:44:33
By: Alan F
Exactly - it's the kicker that causes the problem. And its not a slipping cleat as I use an old fashioned horn cleat. I used to use an excel racing 3mm 2-1 and that worked fine. But a 2-1 is a hassle and lots of string so I wanted to revert to a single part - hence the question? Looks like 3mm D12 is worth a try.
Posted: 02/07/2007 20:51:53
You don't need the full on 2:1. The system i described uses 2:1 purchase on a separate tensioner. It's not very clear, have a look at this photo.
Posted: 02/07/2007 21:07:22
By: Chris M