[TowerTalk] Phillystran As Strong As They Claim?

[Steve Maki]

The strength of Philly is in the (very) small Kevlar core, not the outer 
jacket which is there to provide abrasion and UV protection for the 
core. Kevlar (and other similar and even stronger synthetic materials) 
is stronger than steel on a cross sectional area basis.

-Steve K8LX

On 11/19/2011 11:42 AM, Wayne Willenberg wrote:
> I used 1200I Philliystran for a small dipole pole support.  The end of the
> Philliystran was terminated, per their directions, using one of their
> termination kits (4 cable clamps and a thimble).  When I was done, the
> termination looked just like one of their pictures.
>
> I recently took the dipole down and unscrewed the Philliystran clamps.  I
> was surprised to find at each point where the a clamp was placed, the two
> pieces of Philliystran were each permanently indented in a “U” shape, and
> at the thinnest part of the “U” it measured only about 0.092 inches thick
> (I used my micrometer).
>
>           Can the Philliystran really have a break strength of 1,200 pounds
> (as they advertise) with the type of deformation I have described?  Or, did
> I do something wrong?