Towertalk, My company based in New Zealand is looking at designing a guyed tower for New Zealand conditions and using Dyneema ropes, with are made from "superstrong" polyethylene fibers. I'm interest
Polyethylene is certainly strong, although a rope capable of holding 4000 lbs would be pretty thick. One problem with Polyethylene is that it degrades under UV radiation from the sun. The UV breaks t
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Sat, 7 Jan 2006 17:38:25 +0100 (CET)
Isn't polyethylene rather 'stretchy'? I think you need pre stretched polyester, as is used for sheets on yachts. It's got good UV resistance, too. 73 Peter G3RZP _____________________________________
Antenna guying is what is known as "corner case" in terms of application: 1. Because of wind loading, you need high strength vs diameter. All the "miracle" ropes I've seen are only high strength per
Date: Sun, 8 Jan 2006 00:49:38 -0500 (Eastern Standard Time)
Hi: This is an interesting material. See www.dsm.com. It seems to be used in applications where people are in contact with it or able to visually inspect it, and under intermittent loading. It has a
I'm not sure that the wind load on the guy is a determining factor. In any event, for thin wires, drag is a VERY nonlinear function of diameter, so it's a non trivial tradeoff. The original poster wa
Dyneema is great stuff. Many "A Class" catamaran sailors use this for the forestays to the mast. These are the two lines that hold the mast to the forward points of the two hulls. It is under enormou
Absolutely agree, I am using Dynamix for guying my 150 feet tower with 2x3 el full size 40m yagis and 4 large tribanders. Dynamix is a combination of Dyneema SK75 and Aramid fibres (Kevlar) used in y