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.
Jun 6, 2019
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Pulley system analysis
Tuomas Pöysti, a good friend of RopeLab, has written this article presenting his thoughts on analysing pulley systems.
Apr 22, 2019
Dual Main Rope Rescue Systems
There is a growing awareness of the benefits of dual main over the more traditional single main/single backup rope systems. Single main/single backup systems normally see the task undertaken using
Apr 21, 2019
Members: Big Alpine Butterfly
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
Apr 5, 2019
Members: Alpine Butterfly as an end-line knot
Traditionally many have considered the Alpine Butterfly knot to be a mid-line knot rather than an end-line knot. This report considers its use as an end-line knot. You need to
Jan 9, 2019