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Search took 0.00 seconds. Search: Posts Made By: Seaworthy Lass
Forum: Deck hardware: Rigging, Sails & Hoisting 28-11-2021, 08:11
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

Brilliant! Many thanks for reporting this. It is extremely useful information.

I am not overly concerned with a 15-20% loss of system strength, as the diameter of the UHMWPE I used was generous...
Forum: Deck hardware: Rigging, Sails & Hoisting 28-11-2021, 07:26
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

Yes, Sampson call a Strop Bend a Cow-Hitch connection in their Rope Users Manual (probably what made me follow suit in error) and state it results in a loss of strength of roughly 15% (rope material...
Forum: Deck hardware: Rigging, Sails & Hoisting 28-11-2021, 00:37
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

PS This is a side view of a Modified Strop Bend and a top view before load is applied.

I think Fxykty has now also used this at the bridle junction of his series drogue, but I am not aware that...
Forum: Deck hardware: Rigging, Sails & Hoisting 28-11-2021, 00:21
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

I first need to correct a term I have been using before someone else does :redface:. The Cow Hitch comes in various forms. When loaded on both sides (as in the photos in post #1) it is called a Girth...
Forum: Deck hardware: Rigging, Sails & Hoisting 27-11-2021, 12:52
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

Our headsail area is around 52 m2 so 2000 kg is probably a reasonable estimate.
The load on the loop and the eye portion of the strop would be halved though.

The breaking strength for 8 mm line...
Forum: Deck hardware: Rigging, Sails & Hoisting 27-11-2021, 12:17
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

I have undone several eye splice now in single braid Dyneema (usually as I have either wanted to shorten them or to repurpose the line) and I have seen the same “pressed” appearance of the buried...
Forum: Deck hardware: Rigging, Sails & Hoisting 27-11-2021, 10:28
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Re: Compression of UHMWPE eg Dyneema

I thought someone may ask :).

The explanation is a little complex. Our yankee sheets pass between the shrouds and we need outboard sheets for wide wind angles, otherwise the sheet rubs on the...
Forum: Deck hardware: Rigging, Sails & Hoisting 26-11-2021, 13:46
Replies: 19
Views: 2,646
Posted By Seaworthy Lass
Compression of UHMWPE eg Dyneema

Over the last few years I have posted images and commented on the glassy, rock hard appearance that can occur when UHMWPE line (eg Dyneema, Spectra, Stealth-12, Acera….) is subject to high loads. I...
Showing results 1 to 8 of 8

 
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