Dyneema Standing Rigging a 50' Sloop, Questions for those who have made the swap

[Benz]

Having done lanyards with both Colligo's deadeyes and sailmaker's thimbles (or lead rings, as some now call them), I have to say that the Colligo kit is still worth getting. Because the deadeyes have individual holes for each leg of the lanyard, the legs don't try and ride up on each other and rub and get awkward. With separated legs, it's a lot easier to tighten the lanyard, since you can "twang" each leg in sequence from the deadend to the fall, and thus work out the slack. When every leg is piled up at the bottom of the curve of a plain round thimble, this is a lot harder to do.
When you consider the price of other high-end sailboat parts (think of kit from places like Harken, Tylaska, or Equiplite), the price of the Colligo stuff begins to seem very reasonable.
I recommend using the Colligo deadeyes, and shopping around for deals on line--spool ends, closeouts, etc. My shrouds came in at 63 cents a foot, and they all match!
Ben
zartmancruising.com

[SV Windrush II]

Just read this thread, so much good information here. Now i am definately replacing all my standing rigging with UHMW PE.

Ironically, I have a engineering office in China and deal with a lot of the manufacturing there.
I will do some research on their version of Dyneema SK75, we also have a testing laboratory to test the material ourselves.

On a side note, do not trust anyone on Alibaba unless you test and prove the product first. Companies that advertize products there are oftentimes using pirated documents and trade names, and also copy specifications from real companies web sites.

But i will also mention that there is good quality products coming out of China. The key is to know who to trust and if possible tour the factory. I do not do business with any company here until i see their manufacturing plant personally and test their product.

If you have any questions about a company in china feel free to ask me, i have been doing business here for 8 years and know my way around very well.

[Docfranco]

Not much new in this thread, but wanted to know if I’m on right track.
I’m redoing my mast and standing rigging with sk78 9.5mm.
The boat is a 36’ hans Christian at 25,000lbs.
I plan on 316SS cast thimbles with turnbuckles, should I worry about one point contact where the clevis pin hold the thimble?

[AndyEss]

If you’re concerned about point loading between the clevis pin and thimble, you can bush out the pin.
More important - how could you let your cockpit woodwork deteriorate so much?

[out42]

Originally Posted by Docfranco

Not much new in this thread, but wanted to know if I’m on right track.
I’m redoing my mast and standing rigging with sk78 9.5mm.
The boat is a 36’ hans Christian at 25,000lbs.
I plan on 316SS cast thimbles with turnbuckles, should I worry about one point contact where the clevis pin hold the thimble?

I would spend the money and go for Colligo terminals. Just taken mine down after 6 years on my 42' cat and all in good condition. They aren't cheap but they are really good.

[Boatguy30]

John Franta is for sure the one to answer that. I would say 9.5 78 is going to stretch to much. Need sk99 on a mono or larger size. I personally would use lashing on the lowers and headstays. TBs on uppers and possibly backstay.

[RocketScience]

Originally Posted by Boatguy30

John Franta is for sure the one to answer that. I would say 9.5 78 is going to stretch to much. Need sk99 on a mono or larger size. I personally would use lashing on the lowers and headstays. TBs on uppers and possibly backstay.

X2

You only want to use a heat strengthened Dyneema designed for standing rigging, like Colligo's Dux, or NER's STS-HSR. Additionally, those sailmaker's thimbles do not have the correct turning radius to maintain 100% of the line's strength, and why Colligo's Terminators should be used.

If you purchase the components from Colligo, John Franta will design your rig for free, which is some nice piece of mind given such an important component as your rig.

Shot of my shrouds at the chainplate...

[geoleo]

Originally Posted by Docfranco

Not much new in this thread, but wanted to know if I’m on right track.
I’m redoing my mast and standing rigging with sk78 9.5mm.
The boat is a 36’ hans Christian at 25,000lbs.
I plan on 316SS cast thimbles with turnbuckles, should I worry about one point contact where the clevis pin hold the thimble?

That nice, Now you can be dismasted by some one with a small steak knife.LOL

[RocketScience]

Originally Posted by geoleo

That nice, Now you can be dismasted by some one with a small steak knife.LOL

Yeah, same phantom dude who's running around with cable cutters dismasting wire rigged boats.

[Docfranco]

Originally Posted by geoleo

That nice, Now you can be dismasted by some one with a small steak knife.LOL

You are uninformed.
Not worth replying further...

[Docfranco]

Originally Posted by Boatguy30

John Franta is for sure the one to answer that. I would say 9.5 78 is going to stretch to much. Need sk99 on a mono or larger size. I personally would use lashing on the lowers and headstays. TBs on uppers and possibly backstay.

My research shows sk78 is heat treated to minimize stretch, and is used in larger boats.

[Docfranco]

Originally Posted by AndyEss

If you’re concerned about point loading between the clevis pin and thimble, you can bush out the pin.
More important - how could you let your cockpit woodwork deteriorate so much?

The boat was a “rescue” and mast first then woodwork
Priorities....

[Benz]

Those thimbles are fine.
SK 78 in itself isn't heat treated--make sure you get the heat-treated, pre-stretched stuff. They do make it, but you have to make sure it is.
The Dux that Colligo sells is heat-set sk75. It pre-stretches better than SK 78, meaning that the end result has less creep. It is initially weaker than SK 78, but the heat-setting makes it more suitable.
If price is no object, Marlow's M-rig is the latest, greatest grade of Dyneema for standing rigging. Give the specs a look.

[RocketScience]

Originally Posted by Benz

Those thimbles are fine...

Out of curiosity, why didn't you use thimbles on your own rig, rather than the Colligo terminators you did use?

[Benz]

Originally Posted by RocketScience

Out of curiosity, why didn't you use thimbles on your own rig, rather than the Colligo terminators you did use?

Because I use lanyards to tighten the rig, and the separator holes are crucial. The thimble guy seems to be asking about them for turnbuckle use.