Cable vs rope pulling glider from field

On Thu, 13 Oct 2011 06:39:38 -0700, Auxvache wrote:

Thanks very much for your answers--sounds like Dyneema with a weak link
and Tost ring would be a good set-up.

Yes, I'd agree, but with one warning I should have mentioned: a naked
Dyneema cord is not a good idea because the slightest handling abrasion
tends to fluff it up into an unusable woolly caterpillar-like thing. I
discovered this when trying to use a thin woven Dyneema (80 lb) line to
control the VIT stop on a free flight power model - even expecting it to
handle a 90 degree bend by sliding round a 3mm brass tube was too rough
and caused it to fluff up and become unusable.

What I've found to be excellent is a core of unwoven Dyneema inside a
woven Dacron casing. I've used 100 lb kite bridle (about 0.7mm diameter)
as model glider towline. This was very easy to handle and almost totally
abrasion resistant. I believe you can get this type of line in up to at
least 3mm diameter.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
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