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[Towertalk] Aircraft Cable

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Subject: [Towertalk] Aircraft Cable
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Date: Mon, 30 Sep 2002 23:23:37 EDT
In a recent post, 'aircraft cable' was mentioned as a 'standard guying 
material'.  Several individuals took exception to this comment, noting that 
EHS is the standard guy cable normally used.  That may be the case, but I 
also got the impression that some might not be familiar with 'aircraft 
cable'.  This is unfortunate, because I think it is really a superior 

Normal galvanized EHS cable consists of 7 individual wires of galvanized 
steel.  the breaking point is 3990lbs for 3/16" cable and 6000lbs for 1/4" 
cable.  The cable is fine, but is relatively stiff and inflexible.

7x19 aircraft control cable consists of 7 individual strands, each consisting 
of 19 individual wires.  It is extremely flexible, almost like rope, and very 
easy to work with.  It's available in both galvanized and stainless steel.  
The breaking point for the galvanized material is 4200lbs for 3/16" and 
7000lbs for 1/4".   If your looking for strong, easy to work with steel guy 
cable, you should seriously consider this cable.

While I'm on the subject, the other item I really like to use with this cable 
are the Nicopress copper sleeves.  One of these crimp on items, takes the 
place of several U-bolt, crosby clip, cable clamps and produces a  joint 
stronger than the guy cable itself.  The sleeves are much cheaper than the 
U-bolt hardware but the crimp tool is pricey - about $350 for the 1/4" tool.  
Still its a nice system for permanent joints.  Where you might want to later 
remove a cable, still use the U-bolts.

I'm converting everything to Phillystran, but am using the 7x19 galvanized 
aircraft control cable on the portions of guy lines close to the ground.

73, Bob - W3YY

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