What knot is the Strongest? - Page 3 - SailNet Community
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post #21 of 24 Old 11-19-2017
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Re: What knot is the Strongest?

What exactly is being asked here? For a knot to fail... it either opens and no longer is knot... or the rope parts. and that would be a rope strength factor not the knot.

Knots under lots of strain can get very hard to undo. That's no good. So the name of the game is a knot which is secure... doesn't slip or undo... and doesn't tighten so much that it's difficult to undo.

Sailor, rephrase the question please.

pay attention... someone's life depends on it
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post #22 of 24 Old 11-19-2017
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Re: What knot is the Strongest?

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What exactly is being asked here?...
Uhm, what knot is the strongest?

And this could be answered in actually two ways; the obvious in how the knot is tied (e.g., you wouldn't use a simple clove hitch [weak] to secure your boat to the dock, instead you might use a round turn and two half hitches [strong]), and how a given knot weakens the line under stress, which is the objective of YM's test. And as the test has shown, it appears that the double fisherman’s loop is the strongest knot given that it maintains the highest percentage of the line's breaking strength.

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post #23 of 24 Old 11-19-2017
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Re: What knot is the Strongest?

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Instead, use an eye splice (cover removed) around a thimble with shackle for things like halyards and main sheets, and soft shackles at the jib/genoa sheets.
I'm curious, doesn't this reduce the durability by allowing the core to be damaged by UV light? Granted, it will take time for the material degrade, and I don't know how long that takes?
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post #24 of 24 Old 11-19-2017
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Re: What knot is the Strongest?

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I'm curious, doesn't this reduce the durability by allowing the core to be damaged by UV light?...
Good question.

Unfortunately, Dyneema and Spectra (both UHMWPE derivatives) are relatively new products, so long-term UV testing is fairly limited. My boat is currently rigged (standing) with Colligo's Dynex Dux, an enhanced Dyneema SK75. Colligo's own scientific testing has their Dux lasting 8-10 years uncovered in the tropics. That being said, those who are concerned about UV are serving the exposed core with whipping line, specialty tapes, etc. I don't bother myself, because diameter for diameter, the Dyneema line is typically 3x stronger than your typical polyester yacht braid anyway.

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