Re: 20# Backing to 30# Backing Math

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Posted by Max Garth on 2008-11-09 10:27:51 in reply to Re: 20# Backing to 30# Backing Math posted by Max Garth on 2008-11-08 02:04:44

In this GsP business there is a very distinct difference in the use of Dacron and GsP backing lines, and its something to think about when loading reels with GsP. Firstly with Dacron the loading is done at, let us say, normal pressure and with GsP the loading tension is extremly high, because of the packing density needed to reduce or remove layer slip due to the thin and slippery braided line.
Because of that layer slip the load tension has to be very high and cross hatching is applied every half dozen layers.
This can cause problems because the load pressure does force the packed braid into any holes in the spool surfaces. It just takes one look to tell you that the packed braid does get pushed into the spool holes, and its on the inside of the spool where cleanup is more difficult. The more of and the bigger the holes the greater the probable problem
I did some abrasion testing with various GsP lines and used a textured brick as the abrasive surface. What I found, testing 20lb braid, b/s actually 28lb, was that if I applied the line under tension to the edge of the textured brick if fractured instantly. And after doing some tests on particular bricks I found a spot where the line did not break instantly.
What that told me is that GsP under high tension can fracture instantly if it meets sharp edges, and those sharp edges can be on the inside of fly reel spools, where the GsP braid is loaded at extremly high pressure.
Now I not saying that this will happen to your favourite reel, only that I devised a test whereby I put a length of that same 20lb braid through the spool holes of a number of fly reels and applying tension I pulled the line to and fro through those holes. Maybe its an extreme test, but it worked.
I don't tell anyone which reels did what but let me say that that the edges of spool holes can vary in finish.
There is very little weight difference between reels with holes and no holes when loaded with line and there is no reason why they should have holes these days. They could be fluted without breaking through the inside surface of the spool.
What I am saying is that GsP braid has some fine points, but it can be hell on wheels too, because of the high modulus, which people forget about, the very small diameter, the lack of stretch, the slip, stiffness, very bad critical radius, lousy knot strength and the variable braiding formulas used by various companies.
All associated with the chemical composition of the yarn which you cannot alter. Period.

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