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Absorbica L64 & L57 energy absorbers. How far do they extend? What is the force required to "tear" them open?
A test looking at the effect of a fall on the rope below the victim's chest ascender.
Last month I published the test report: Pulley + rope efficiency. As with most tests, I was left with even more questions. The key observation was that measured pulley efficiency varies significantly (up to 10%)
There more to measured pulley efficiency than just consideration of the physical bearings or bushings on the axle. This report considers the effect of losses within the rope.
There are many ways to tie a single rope to a pair of anchor points. The two methods most commonly used are: the Alpine Butterfly & Figure-of-8 “Y-hang”. the Figure-of-8 bunny ears knot. You need to login