Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 26-06-2016, 18:37   #1
Registered User

Join Date: May 2014
Location: Al
Boat: 1981 51' Formosa
Posts: 183
Dyneema to double braid polyester halyard

As an alternative to a wire to rope halyard I am looking at Dyneema to polyester double braid. Would an eye splice to eye splice be ok? 1/2" double braid polyester to 3/8 Dyneema single braid.
__________________

__________________
Formosa Scott is offline   Reply With Quote
Old 26-06-2016, 22:38   #2
Marine Service Provider

Join Date: May 2012
Location: New Orleans
Boat: We have a problem... A serious addiction issue.
Posts: 3,940
Re: Dyneema to double braid polyester halyard

Probably not. The eye splice junction is pretty unlikely to run thru the blocks easily. Why not just use all dyneema with covers spliced in place where you need them? Reef points and where the halyard hits when the sail is up.
__________________

__________________
Greg

- If animals weren't meant to be eaten then they wouldn't be made of food.
Stumble is offline   Reply With Quote
Old 27-06-2016, 09:23   #3
Registered User

Join Date: May 2014
Location: Al
Boat: 1981 51' Formosa
Posts: 183
Re: Dyneema to double braid polyester halyard

The eye splice wouldn't pass through the sheaves or any blocks.
__________________
Formosa Scott is offline   Reply With Quote
Old 27-06-2016, 09:51   #4
CF Adviser

Cruisers Forum Supporter

Join Date: Aug 2009
Boat: Custom Van De Stadt 47 Samoa
Posts: 3,744
Re: Dyneema to double braid polyester halyard

This is a better splice for that application - Splicing Amsteel to Sta-Set
__________________
estarzinger is offline   Reply With Quote
Old 27-06-2016, 10:23   #5
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2005
Boat: Outbound 44
Posts: 4,580
Re: Dyneema to double braid polyester halyard

Quote:
Originally Posted by estarzinger View Post
This is a better splice for that application - Splicing Amsteel to Sta-Set
Evans
Have you done any testing on this splice? I used it on my topping lift and it has been fine for a couple of years use. Not the easiest splice to make.
__________________
Paul L
http://svjeorgia.blogspot.com
Paul L is offline   Reply With Quote
Old 27-06-2016, 12:31   #6
Registered User

Join Date: May 2014
Location: Al
Boat: 1981 51' Formosa
Posts: 183
Re: Dyneema to double braid polyester halyard

Quote:
Originally Posted by estarzinger View Post
This is a better splice for that application - Splicing Amsteel to Sta-Set
Thanks for the link, I could not find an example anywhere. Is this better as in stronger or does it just look better? I can see where it would be nice if the line were passing over the sheaves or through blocks.
__________________
Formosa Scott is offline   Reply With Quote
Old 27-06-2016, 12:35   #7
CF Adviser

Cruisers Forum Supporter

Join Date: Aug 2009
Boat: Custom Van De Stadt 47 Samoa
Posts: 3,744
Re: Dyneema to double braid polyester halyard

^^ agreed, it is a bit fiddly to make - but doable if you just take time.
There are some similar but easier splices, but they are not technically as good.
This design "should be" near the full strength of the double braid if done properly and carefully.
I only ever tested one sample (there is just not much call for this sort of slice) and I remember it tested "pretty good" but was not 100% . Someone else made it and he did admit he might have been a little sloppy.
__________________
estarzinger is offline   Reply With Quote
Old 27-06-2016, 12:41   #8
CF Adviser

Cruisers Forum Supporter

Join Date: Aug 2009
Boat: Custom Van De Stadt 47 Samoa
Posts: 3,744
Re: Dyneema to double braid polyester halyard

A similar alternative is to use these instructions http://www.samsonrope.com/Documents/...or_End_WEB.pdf,

But just ignore all the steps associated with the cover on one side (because op has a single braid there with no cover).

bit most people these days are just getting a full length of single braid a threading a tenex cover over the part they wanted covered.
__________________
estarzinger is offline   Reply With Quote
Old 27-06-2016, 12:45   #9
CF Adviser

Cruisers Forum Supporter

Join Date: Aug 2009
Boat: Custom Van De Stadt 47 Samoa
Posts: 3,744
Re: Dyneema to double braid polyester halyard

Quote:
Originally Posted by Formosa Scott View Post
Thanks for the link, I could not find an example anywhere. Is this better as in stronger or does it just look better? I can see where it would be nice if the line were passing over the sheaves or through blocks.
The eye to eye will be in the 90-95% range if perfectly done. And there will be done movement/chafe, unless you sew the eyes together (which you could do). And is bulky.

This end to end is 100% if perfectly done, no movement/chafe, and slick.

Net If you don't care about the bulk, the differences are minimal and the eye to eye is fine . . . But it is not the most elegant solution.
__________________
estarzinger is offline   Reply With Quote
Old 27-06-2016, 12:47   #10
Writing Full-Time Since 2014
 
thinwater's Avatar

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 4,333
Re: Dyneema to double braid polyester halyard

I've used this splice, even on old line. Not bad, so long as you loosen the rope up first. Practice with some scraps first.

Though I have not pull-tested it, other have. Moreover, halyards are sized for stretch, not strength, so you are not going to be near the limit.

The other thing I have done, to save a couple bucks, is simply use the cover of the retired polyester line. Most often the part that was hidden inside the mast is pristine. Use the old core to pull the Amsteel through. Then just tuck the cover in at the crossover. Easy.
__________________

__________________
Gear Testing--Engineering--Sailing

Writing full-time since 2014.
Bookstore:http://sail-delmarva.blogspot.com/20...ook-store.html
thinwater is offline   Reply With Quote
Reply

Tags
dyneema, halyard

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Splicing Dual braid Dyneema STS WR2 phorvati Deck hardware: Rigging, Sails & Hoisting 6 06-08-2015 14:35
Double Braid Polyester Line On The Cheap Mardagan Deck hardware: Rigging, Sails & Hoisting 18 23-01-2015 16:34
Double Braided Polyester sources s/vPainkiller General Sailing Forum 2 02-10-2013 11:53
Strops, Knots and Lashings with Dyneema Single Braid ? akio.kanemoto Deck hardware: Rigging, Sails & Hoisting 14 07-11-2011 13:30



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:45.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.