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%) with the choice of rope.
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Richard Delaney has worked professionally with ropes since 1992 as a multi-pitch rock-climbing instructor, technical rescue instructor and rope access technician. Understanding and teaching the Physics of Rigging is a core passion of Richard’s, one based on his experience, and his prior professional life as a qualified engineer.