Dyneema to double braid polyester halyard

[Formosa Scott]

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.

[Stumble]

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.

[Formosa Scott]

The eye splice wouldn't pass through the sheaves or any blocks.

[estarzinger]

This is a better splice for that application - Splicing Amsteel to Sta-Set

[Paul L]

Originally Posted by estarzinger

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.

[Formosa Scott]

Originally Posted by estarzinger

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.

[estarzinger]

^^ 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]

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]

Originally Posted by Formosa Scott

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.

[thinwater]

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.