Recent Blogs
Movable-Pulley Cord System (c): Standing-End and Haul-Line Ledger
How a cord-and-movable-pulley system halves lifting force in rigging, theatre, and workshop hoists. Mechanical advantage formulas, worked example, and diagrams.
Single Movable Pulley: Ideal Rope Tension and Displacement Geometry
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.
Equalizing Pulley: Sheave Motion, Rope Tension and Calculator
Explore an equalizer sheave with two vertical rope legs. Compare ideal tension, sheave-to-rope ratio, groove clearance and a measured breakaway difference.