Subject: Re: [baidarka] thread
From: steve (vtboat@VERIZON.NET)
Date: Fri Nov 21 2003 - 14:07:02 EST
Throughout Robert Morris's book Building Skin on Frame Boats he
recommends NYLON multifiliment for lashing. I have found both polyester
and nylon artificial sinew available.
You wrote..."Avoid nylon, especially for lashings! "
So, is Morris wrong to recommend this? I just ordered a roll of Nylon
artificial sinew to lash my boat.
Is the stretch involved in the short distances involved in a typical
nylon lashing significant enough to allow
the lashing to fail? If I apply tension to the line while lashing,
making it stretch, won't it be tighter because it
will also shrink back? How about prestretching the line before lashing?
Isn't some flexibility desired in the joint?
I suspect either fiber will work but there may be variations needed in
such things as how tight things are pulled and the knots used. Since I
have no direct experience with either. I am guessing and seek advice
from others
with practical experience using both.
Peter Chopelas wrote:
>>I began sewing today with a polyester kite string. It was unwaxed--my
>>
>>
>thought
>
>
>>was to allow the polyurethane to get to it. I do have waxed line that is
>>
>>
>part
>
>
>>of a line wiping kit. It is a heavy strength waxed nylon.
>>
>>
>
>Polyester is good, it does not stretch much and will not go slack with
>moisture, which is what nylon does. Avoid nylon, especially for lashings!
>
>There is a good heavy polyester thread available from marine supply stores
>for mending sails. Dyson also sell the good stuff at a great price (you get
>a huge spool likely to last a life time of building!). Waxing kind of
>lubricates it, I do not think it will affect the sealing, especially if you
>used oil based poly paint.
>
>Peter
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