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Search took 0.00 seconds. Search: Posts Made By: 40 South
Forum: Deck hardware: Rigging, Sails & Hoisting 04-01-2021, 00:36
Replies: 62
Views: 19,299
Posted By 40 South
Re: Another dyneema line failure

Your 10mm backstay should be around 8600kg BS. It may be higher depending on the grade and manufacturer. The ram has the power on the 2:1. As I said earlier it only needs 5450 kg force to break the...
Forum: Deck hardware: Rigging, Sails & Hoisting 03-01-2021, 23:31
Replies: 62
Views: 19,299
Posted By 40 South
Re: Another dyneema line failure

From the info I have Dynex Dux doesn't come in 8mm, 7mm or 9mm. It is made from larger sizes and stretched so it finishes smaller.

OK, a few numbers for you to think about.......9mm breaking...
Forum: Deck hardware: Rigging, Sails & Hoisting 03-01-2021, 22:36
Replies: 62
Views: 19,299
Posted By 40 South
Re: Another dyneema line failure

If as you say the internal strands are the significantly damaged ones and from what I can see of the outer strands....no, I don't accept that UV is the issue here. I think it is uneven loading of the...
Forum: Deck hardware: Rigging, Sails & Hoisting 03-01-2021, 21:42
Replies: 62
Views: 19,299
Posted By 40 South
Re: Another dyneema line failure

Hydraulic rams can output significant loads and they are unforgiving. I don't know the sizing of the ram or working pressure so cannot comment on actual loads.

Just about any rope/line will have a...
Forum: Deck hardware: Rigging, Sails & Hoisting 03-01-2021, 20:56
Replies: 62
Views: 19,299
Posted By 40 South
Re: Another dyneema line failure

Single braid dyneema does not have a core! It is made up of 12 sets of fibres plaited together.

Heat set dyneema (Dynice Dux etc.) does not like being load cycled as used in your application, it...
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