Mechanisms — cord pulley system

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

Posted by Robbie Dickson on

How a cord-and-movable-pulley system halves lifting force. Real worked example, mechanical advantage formula, and rigging examples for shop and field use.
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Pulley System with Cord and Movable Pulleys (c) diagram
Movable-Pulley Cord System (c): Standing-End and Haul-Line Ledger

Posted by Robbie Dickson on

How a cord-and-movable-pulley system halves lifting force in rigging, theatre, and workshop hoists. Mechanical advantage formulas, worked example, and diagrams.
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Pulley System with Cord and Movable Pulleys (b) diagram
Movable-Pulley Cord System (b): 2:1 Lift with Right-Angle Haul

Posted by Robbie Dickson on

Movable pulley systems with cord cut lifting force in half or better. See how riggers, theatres, and shipyards use them to hoist heavy loads with...
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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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