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Search took 0.00 seconds. Search: Posts Made By: thinwater
Forum: Deck hardware: Rigging, Sails & Hoisting 16-07-2019, 09:05
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Morgan's Cloud (pay wall https://www.morganscloud.com/) just posted a lengthy discussion of real-world difficulties of recovering a Dyneema JSD due to slipperiness. I've never done this (only...
Forum: Deck hardware: Rigging, Sails & Hoisting 26-05-2019, 18:51
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

I know this one!!


I keep several large gauge needlepoint needles in my splicing kit; the tips are rounded, to prevent them from cutting and to help them glide through the holes. As such, you can...
Forum: Deck hardware: Rigging, Sails & Hoisting 24-05-2019, 18:05
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Actually, in calm to moderate weather, an anchor suspended under a large fender works reasonably well. People have sailed long distances on such jury rigs. (Article of mine in last Good Old Boat.)...
Forum: Deck hardware: Rigging, Sails & Hoisting 16-05-2019, 20:15
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

[QUOTE=olaf hart;2890308]I suspect you want a stand alone drogue for emergency steering, a series drogue won’t be much use.
The drag needs to be close to the transom to be effective
We use a...
Forum: Deck hardware: Rigging, Sails & Hoisting 16-05-2019, 06:08
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Thanks!! Good answers.


As for the stitching, many people overlook the fact that climbing slings are loops, largely for the reasons you gave. Much easier to get full strength than with two eyes....
Forum: Deck hardware: Rigging, Sails & Hoisting 14-05-2019, 20:49
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

a. A these secret, or will you share them? I know that with nylon, layering has been known since WW II.


b. " (important to note that I guess most of the 'good' testing that has been done on...
Forum: Deck hardware: Rigging, Sails & Hoisting 12-05-2019, 12:12
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Samson is one of the few rope companies that tests and reports rope strength with eye splices included, rather than on spools (NER used to do this as well). In a way, it makes sense, since there is...
Forum: Deck hardware: Rigging, Sails & Hoisting 12-05-2019, 07:29
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Also worth noting is that some of the methods that worked with hemp (seizing) don't work with modern ropes (nylon stretches under load and the seizing comes loose, UHMPE is just to slippery).

...
Forum: Deck hardware: Rigging, Sails & Hoisting 11-05-2019, 14:07
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

It was a firm warning. I think it is more a matter of taking a good close eye to any potential snag points or sharp edges and doing something about them.



Remember that during testing I was...
Forum: Deck hardware: Rigging, Sails & Hoisting 11-05-2019, 13:07
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Lots of great discussion. Really. I'm going to off topic just a few inches to answer a question that came up a few pages back.


Yes, I've seen single leg loading and really, really slack legs in...
Forum: Deck hardware: Rigging, Sails & Hoisting 05-05-2019, 10:43
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

With so little field data, it's tough. I would go with the number of cones recommended for the boat size (not more) and reinforce them as some have (but perhaps one weak "wear indicator" cone), but...
Forum: Deck hardware: Rigging, Sails & Hoisting 05-05-2019, 08:43
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

BUT, the cow hitch eliminates motion, and thus chafe. This is why we need to KNOW if there is ANY history of chafe at this join. Surely someone knows whether it chafes at all, or not. My...
Forum: Deck hardware: Rigging, Sails & Hoisting 05-05-2019, 07:23
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

This should get you thinking:


https://www.blackdiamondequipment.com/en_US/qc-lab-connecting-two-slings-together.html


MAMMUT'S RESPONSE TO SLING FAILURE - Alpinist.com...
Forum: Deck hardware: Rigging, Sails & Hoisting 04-05-2019, 11:19
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Like a spelling error, I just have to point this out.


Strain is the amount something stretches.
Stress is the force.


It is "minimum breaking strength." Break strain is literally, to an...
Forum: Deck hardware: Rigging, Sails & Hoisting 04-05-2019, 08:52
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Interesting thought, worth thinking through.



Drag through the water is about 0.6 pounds per square inch and 10 knots. If we assume 10mm line about 10 feet long (the other half of the load is...
Forum: Deck hardware: Rigging, Sails & Hoisting 02-05-2019, 20:10
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

First, SWL is an obsolete term that is not used by ISO. Rated capacity or WLL are now used. The common explanation for the change is legal risk, but it is more complex that that.


There are two...
Forum: Deck hardware: Rigging, Sails & Hoisting 02-05-2019, 18:01
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

The problem with high modulus lines is that they are so non-stretch, there is less load sharing around bends.



I worked with Starzinger on chafe as well (I made up samples, we both pull-tested...
Forum: Deck hardware: Rigging, Sails & Hoisting 01-05-2019, 11:08
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

I started to choke on this. Climbers retire lines, but not quickly (yeah, I was out cragging this morning). They consider both the number of very hard falls (very few are), look for damage, and...
Forum: Deck hardware: Rigging, Sails & Hoisting 01-05-2019, 07:17
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Honestly, all of these solutions are probably very safe. No knots, no sharp edges, no thimbles, no nylon. These are the problems that have contributed to losses. Weak cones are an issue, but from...
Forum: Deck hardware: Rigging, Sails & Hoisting 30-04-2019, 19:46
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Perhaps I was not clear.


When the pitching is vertical, the shackles will swivel up and down, because the holes in the transom chain plates are drilled horizontal. This is fine, they can take...
Forum: Deck hardware: Rigging, Sails & Hoisting 30-04-2019, 14:48
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

I see one potential weakness. I haven't thought this through, so take it easy on me.

As the boat yaws from side-to-side the rope will flex where it comes out of the cow hitch. The flexing will be...
Forum: Deck hardware: Rigging, Sails & Hoisting 30-04-2019, 14:18
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Brilliant and thank you for your effort! That is exactly how I was going to set it up.



The "glued together" result is what you are looking for. No movement. However, before we say that the...
Forum: Deck hardware: Rigging, Sails & Hoisting 30-04-2019, 09:45
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Agreed, and I don't think you are sticking your neck out.



MC posted images of a JSD bridle that nearly failed because the thimbles shifted. Starzinger studied the deformation of thimbles at...
Forum: Deck hardware: Rigging, Sails & Hoisting 29-04-2019, 20:29
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Have you tested this under some load? My thought is the reverse, that one hitch allows more movement. But testing would convince me. If not, I think I will take this on. Curiously, the results with...
Forum: Deck hardware: Rigging, Sails & Hoisting 29-04-2019, 07:01
Replies: 667
Views: 251,845
Posted By thinwater
Re: Stealth mode - New Generation Ropes

Is there ANY data that suggest cow hitching an eye reduces strength or that chafe is possible? I've done pull testing, and they don't break at the knot, they break at the end of the bury. Like a...
Showing results 1 to 25 of 46
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