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Cable vs rope pulling glider from field
On Oct 13, 7:31*pm, Martin Gregorie
wrote: 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 org * * * | Martin, you must have had some really crappy rope mislabeled as Dyneema . The 12 strand hollow braid we use has 15x the abrasion resistance of steel. The off road 4x4 guys use it on their bumper winches with it going over sharp rocks and trees. I've never seen the problems you describe. |
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