Mechanisms — single movable pulley

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Pulley System with Cord and Movable Pulleys (a) diagram
Movable-Pulley Cord System (a): Fixed 2:1 Reeving Ledger

Posted by Robbie Dickson on

Movable pulley systems with cord cut lifting force in half or more. Learn the mechanical advantage formula, real rigging examples, and design tradeoffs.
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Movable Lower Pulley (single-movable) diagram
Single Movable Pulley: Ideal Rope Tension and Displacement Geometry

Posted by Robbie Dickson on

Calculate ideal rope tension, vertical force ratio and local load rise for a single movable pulley with symmetric rope segments. Includes an animated force model.
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