Hi follow you for longtime and specially love your tiki26 Amazing trip, seems you dont have social group to communicate and follow you .... Any way my best wishes in your project and happy new year and fair winds, cheers
This only proves that the principle is sound, but in no way does it address real world operating conditions. Once it has completed a vigorous seasons sailing with salt, UV and the countless other contaminants (oils, deck cleaner etc) and RE-tested - could you call it - TRUSTABLE
Very good point, you are right! What convinces me is that you should see the wear on Dyneema visually from the outside, not like on steal riggs where the oxidation and cracks may start from the inside of the cables and fittings.
@@NiklausWildisen My initial concern is that a contaminant has a free reservoir inside of the weave and then a secondary effect could then be caused as a new one arrives at a later date - you could think of such a process being akin to slowly acquiring the constituents of a battery cell by deposition. I wish you very well in your studies Sir.
I think the chemical inertness of UHMWPE is sufficient for marine conditions: assets.ctfassets.net/q6qgec8ud5tq/3n0mW4BfpPxWFySesfcwOZ/ea0f9c49150c7700ab2d385b10e6d15a/CIS_YA101_Chemical_Resistance.pdf. I agree that the thimbles probably improve the strength as the bend radius will be greater than the radius of the test rig pins. The splice itself seemed to remain intact 😀
@PRAR1966 there are decades of history of dyneema/uhmwpe performing exceptionally well in the marine industry. Resisting many difficult situations, much more difficult than those of these sailboat stays and dead eyes. Dyneema on mast stays is sized for stretch not strength..thise 12mm stays are many times stronger than the original SS wire rope. Finally that was a poor test. The radius of the bend was very sharp, and of course the line broke there. A more I formative test would have been test the thimbled dead eye. With those radi, I suspect the thimbles would have distorted long before the dyneema parted
@@Andyfunsail I agree. But I am sure the breaking strength would be even higher. The breaking strength without the thimbles is already more than high enough.
@@NiklausWildisen definitely and it showed how a small bending radius is so bad for the strength of the dyneema. One of the TH-cam channels just connected their dyneema to a ring 😅 Maybe you can take one of your deadeyes back to the university for a test when you head back home at some point. It'll be interesting to see if the strength has degraded from UV. I'm rigging my 1979 Wauquiez ketch in dyneema at the moment :) thanks for sharing your experiences.
@@Andyfunsail I would be curious too about how much UV weakens the Dyneema over time. So far there is only a bit of change in colour in the parts I didn’t cover in an abrasion sleeve. Good luck with your rigging! The moment you can take the old stainless cables away really is a good feeling.
Hi follow you for longtime and specially love your tiki26 Amazing trip, seems you dont have social group to communicate and follow you .... Any way my best wishes in your project and happy new year and fair winds, cheers
Really enjoyed your video. Great to see the results you got and amazing how strong (and uniform) your deadeyes are!
This only proves that the principle is sound, but in no way does it address real world operating conditions. Once it has completed a vigorous seasons sailing with salt, UV and the countless other contaminants (oils, deck cleaner etc) and RE-tested - could you call it - TRUSTABLE
Very good point, you are right! What convinces me is that you should see the wear on Dyneema visually from the outside, not like on steal riggs where the oxidation and cracks may start from the inside of the cables and fittings.
@@NiklausWildisen My initial concern is that a contaminant has a free reservoir inside of the weave and then a secondary effect could then be caused as a new one arrives at a later date - you could think of such a process being akin to slowly acquiring the constituents of a battery cell by deposition. I wish you very well in your studies Sir.
I think the chemical inertness of UHMWPE is sufficient for marine conditions:
assets.ctfassets.net/q6qgec8ud5tq/3n0mW4BfpPxWFySesfcwOZ/ea0f9c49150c7700ab2d385b10e6d15a/CIS_YA101_Chemical_Resistance.pdf.
I agree that the thimbles probably improve the strength as the bend radius will be greater than the radius of the test rig pins. The splice itself seemed to remain intact 😀
@PRAR1966 there are decades of history of dyneema/uhmwpe performing exceptionally well in the marine industry. Resisting many difficult situations, much more difficult than those of these sailboat stays and dead eyes. Dyneema on mast stays is sized for stretch not strength..thise 12mm stays are many times stronger than the original SS wire rope. Finally that was a poor test. The radius of the bend was very sharp, and of course the line broke there. A more I formative test would have been test the thimbled dead eye. With those radi, I suspect the thimbles would have distorted long before the dyneema parted
It would be interesting to test it with the thimbles attached.
@@Andyfunsail I agree. But I am sure the breaking strength would be even higher. The breaking strength without the thimbles is already more than high enough.
@@NiklausWildisen definitely and it showed how a small bending radius is so bad for the strength of the dyneema. One of the TH-cam channels just connected their dyneema to a ring 😅
Maybe you can take one of your deadeyes back to the university for a test when you head back home at some point. It'll be interesting to see if the strength has degraded from UV.
I'm rigging my 1979 Wauquiez ketch in dyneema at the moment :) thanks for sharing your experiences.
@@Andyfunsail I would be curious too about how much UV weakens the Dyneema over time. So far there is only a bit of change in colour in the parts I didn’t cover in an abrasion sleeve.
Good luck with your rigging! The moment you can take the old stainless cables away really is a good feeling.
@@NiklausWildisenthank you