Odd eye splice

[Neeves]

On heat shrink - why not?

Is there a technical reason not to use heat shrink? It cannot be economy - cheap as chips. It cannot be the impact of heat on the underlying rope - the temperatures are too low (if conducted properly).

Jonathan

And a reply tp my own post

Abrasion is one reason to use a shrink cover, the other might be UV.

Our bridle (or if we had a one keeled yacht) our snubber is permenantly rigged fully exposed to the elements (as snubbers and bridle if they are not permanently rigged will not be used). They are thus subject to whatever 'weather' can throw at them. The whole idea of snubbers and bridles is to offer comfort and safety.

A shrink fit cover might be belt and braces - but if it extends life, comfort and safety - why not.

Now I'm happy to be shown a shrink cover is a waste of money - but until there is some data - a criticism is meaningless.

I'm interested in the data - as we have been at anchor for the last few days and I'd like to know that my shrink covers are beneficial (or not) based on some form of test protocol......

In the absence of data - we will err on the side caution.

Jonathan

 

[Neeves]

Its simply too easy to say something will not work, Saildrives are an example.

More focussed - 'originally' Dyneema was said to have poor UV resistance (possibly by extrapolation of Kevlar's background).

Without the data, or a link, a criticism in meaning less.

Jonathan

 

[zoidberg]

I had a lengthy attempt to splice this rope using the Marlowbraid technique ( Youtube ) suggested above. Despite my best efforts, the attempt failed. While I was able, just, to pull the tapered core through.... it proved quite impossible to pull the tapered cover inside.

The cover was simply braided far too tight. Nothing I could do - and I tried multiple 'ploys' - would persuade that well-reduced cover to pass into the already-swollen cover-part already containing a layer of unreduced core and a layer of reduced core.

I've cut off the 'offending' part and will now seek a commercial sewn splice-with-abrasion cover. I'll also use a whipping or shrinkwrap.

 

[thinwater]

I had a lengthy attempt to splice this rope using the Marlowbraid technique ( Youtube ) suggested above. Despite my best efforts, the attempt failed. While I was able, just, to pull the tapered core through.... it proved quite impossible to pull the tapered cover inside.

The cover was simply braided far too tight. Nothing I could do - and I tried multiple 'ploys' - would persuade that well-reduced cover to pass into the already-swollen cover-part already containing a layer of unreduced core and a layer of reduced core.

I've cut off the 'offending' part and will now seek a commercial sewn splice-with-abrasion cover. I'll also use a whipping or shrinkwrap.

The trouble with whipping over sewn splices on nylon is that unless you use a serving mallet to get it exceptionally tight, or whip it would under high tension, the whipping will be come loose and slide off when the rope gets skinny when the rope stretches. Not a serious problem with polyester.

Not just any heat shrink. It must be heavier than most electrical tubing.

Tubular webbing also works very well.

 

[Neeves]

Heat shrink for wiring is skinny and, surprise, surprise is sold to cover wiring.

Heat shrink for rope is a different animal and when shrunk is quite beefy much heavier, as supplied, to electrical heat shrink and significantly heavier when shrunk.

Jonathan

 

[thinwater]

Heat shrink for wiring is skinny and, surprise, surprise is sold to cover wiring.

Heat shrink for rope is a different animal and when shrunk is quite beefy much heavier, as supplied, to electrical heat shrink and significantly heavier when shrunk.

Jonathan

Exactly.