Members: Rope-to-rope rescue
A test looking at the effect of a fall on the rope below the victim's chest ascender.
Richard Delaney Archive
Members: Rope efficiency in haul systems
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%)
Members: Pulley + rope efficiency
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.
Pulley system analysis
Tuomas Pöysti, a good friend of RopeLab, has written this article presenting his thoughts on analysing pulley systems.
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 a main rope with another backup rope