Hi Charlie,

I'm no expert, but I have replaced my lifelines with dyneema and several other 
running rigging things.  I made a short strop to raise the mainsheet purchase 
up off the traveller car and recently changed the wire in my solid vang to 
dyneema.  I like dyneema because it's so easy to splice.  However, I can also 
cut it with a good knife in one stroke.  I think SS wire is best for a 
centerboard pennant because it is more ressistant to abrasion, harder to cut, 
and therefore more reliable especially out of sight and underwater.  My 2 
cents. 



Chuck
Resolute
1990 C&C 34R
Broad Creek, Magothy River, Md

> On July 7, 2017 at 3:52 PM Charlie Nelson via CnC-List 
> <cnc-list@cnc-list.com> wrote:
> 
>     It is time for me to replace my centerboard pennant--now 6 years old. 
> 
>     The yard likes to go with stainless steel wire, which is the same as the 
> original pennant delivered with the boat when new in 1995. 
> 
>     I am considering using an equivalent or stronger dyneema line but have a 
> few questions for the list before I proceed. 
> 
>     1. A portion of the pennant is always exposed to the sun--between the aft 
> cabin top winch and the turning blocks which direct the line below thru the 
> SS tubes. How does this portion of the line get protected from the UV? I 
> think a covered line would provide protection but the cover may not fit thru 
> the SS tubes which take the line to the board. Further, the cover on the line 
> should probably not stay in the water below the surface since it is likely 
> not dyneema. 
> 
>     2. The current SS wire is bent in a loop and swaged and led to a winch 
> with a 3:1 purchase.  In the up position, the purchase and winch (and line 
> clutch) hold the board up. When the board is fully extended, it is stopped by 
> a fitting that 'catches' the swage and stops the board at a depth of ~ 7' 3". 
>  At this depth, the leading edge of the board matches the leading edge of the 
> centerboard trunk (and the board is supported against athwartship forces by 
> the trunk).Thus the board is always held by the pennant, whether it is up or 
> down. Without a swage fitting, how will the line hold the board up while it 
> is extended? 
> 
>     Hopefully some center-boarders on the list have switched to line and come 
> up with solutions. 
> 
>     Thanks,
> 
>     Charlie Nelson
>     Water Phantom
>     C&C 36 XL/kcb
> 
> 
> 
> 
> 
>      
>     cenel...@aol.com
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