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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 Dyneema Lifelines		  New Topic  Topic Locked
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skrenz
Captain

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USA
351 Posts
Initially Posted - 02/21/2012 :  14:10:27  Show Profile
In the Catalina 25 forum one of the topics talked about replacing the standard coated stainless steel lifelines with Dyneema. Now I have been thinking the same thing for a couple of years since to me it made great sense. UV deterioration has been a problem in the past but you are now able to get Dyneema, or similar, with UV protective coatings.
To me it's in the installation details that are the questions. We know that line like Dyneema does not take well to kinking and even knotting. This raises my two concerns if I go with replacing the existing stainless steel lines with Dyneema:
<ul><li>Given the Dyneema doesn't like kinking, what would be the best way to attach the line to the existing attachments (bow pulpit, pelican latch, etc) Would a rigging thimble and eye splice work best? </li><li>I am concerned that the existing holes through the stanchions will be too rough and might abrade the line. Any thoughts on how to counter this? </li></ul>It would be great if I could reuse the existing swagged pelican hooks somehow but I suspect there is no way to do so.

Any thoughts or opinions?
Thanks
Steve Krenz
`Elan
1978 SR/SK #482
Santa Fe, New Mexico
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NautiC25
Admiral

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USA
957 Posts
Response Posted - 02/21/2012 :  14:28:32  Show Profile
A kink in dyneema only weakens the line. I believe if I remember correctly, it can be up to 30% or something to that affect. Even if it was 85%, it would still have a 600lb breaking point. So yes, it's true, but not worth thinking about.
Edited by - NautiC25 on 02/21/2012 14:29:29
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Mark Maxwell
Captain

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USA
329 Posts
Response Posted - 02/23/2012 :  11:32:27  Show Profile
I did this conversion on Impulse. I really like it. The cost for the set up was about the same (a little more but I needed new pelican hooks anyway ) as the new deluxe lifeline kit from Foredeck. However to replace the lines in the future will be much less. I bought the new hardware from here http://www.porttownsendrigging.com/parts/lifeline/ll_spliceline/ There really is no way to attach the line to a swagged fitting, you will need an eye to loop through. I used info from Colligo http://www.colligomarine.com/vmchk/Synthetic-lifelines.htm They have videos on how to tie Brummel splice in the line. There are also some helpful products for line protection. I too was worried about passing the line through the existing holes on my stantions so i took a rat tail file and smoothed the edges followed by some work with stainless steel wool to polish them. So far so good. When I'm at the boat next I can snap some photos if that will help.
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Mark Maxwell
Captain

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USA
329 Posts
Response Posted - 02/27/2012 :  23:16:50  Show Profile
Here are a few shots of the gate and how I tied loops to adjust the lines like turn buckles
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NautiC25
Admiral

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USA
957 Posts
Response Posted - 02/28/2012 :  06:08:12  Show Profile
Very nice work!
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JimGo
Admiral

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USA
962 Posts
Response Posted - 02/28/2012 :  06:53:43  Show Profile
Mark, thanks for the pictures! That helps explain a lot!
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.