pulley efficiency

What Does the Anchor Actually See? Anchor Forces in Rope Rescue Haul Systems

/ Blog, Designing Your Processes, General Rigging, Mechanical Advantage, Minimalist Mountain and Climber Rescue, Principles of Learning, Technical Learning

Every anchor gets rigged for a number. Usually that number is the load: the weight of the patient, the litter, and the attendant hanging on the mainline. Build the anchor strong enough to hold that load with a healthy safety factor, and the job feels done. The problem is that the anchor doesn’t only hold

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rescue and rigging pulleys

Why Pulley Selection Matters More Than Most Rescue Teams Realize

/ Blog, Pulley Systems, Pulleys & Mechanical Advantage, Uncategorized

Why Pulley Selection Matters More Than Most Rescue Teams Realize Most rescue personnel learn pulleys through mechanical advantage systems. A 3:1 contains a certain number of pulleys. A 5:1 contains a few more. Eventually, the conversation moves toward hauling efficiency, progress capture, and system resets. While those discussions are important, they often leave one critical

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