Block and tackle

Block and tackle, combination of a flexible rope, or cable, and pulleys commonly used to augment pulling force; it can be used to lift heavy weights or to exert large forces in any direction. In the Figure there are four freely rotating pulleys, two on the upper block, which remains fixed, and two

Examples of Block and Tackle Rigs

Reeving blocks to set up a double pulley system requires a little thought. A double pulley system, also known as a "block and tackle," consists of the pulleys, or blocks, and the tackle, the ropes riven through the blocks. You must decide if you will use a double pulley system with one sheave--the roller in a ...

Coloring page pulley - coloring picture pulley. Free coloring sheets to print and download. Images for schools and education - teaching materials. Img 18939.

Functional & Decorative Wooden Block and Tackle: Now and then living on the West Coast of Canada, I've come across old wooden marine pulley blocks. More often than not they would have a wood body and a steel pulley a few of the older ones have wood pulleys, they are often used in home decor. So j…

About this item Rust-proof zinc-plated housing, safety hooks hold hoist safely in place; Along with 2pcs 18-inch Soft Loops Metal wheels with bearing structure, more labor-saving; Soft loop, Strong, long lasting polypropylene rope 50 Feet of 4.5mm Poly Rope with 2000 Breaking Strength and 1000 lbs Load Cap; ideal for lifting small and large items The pulley system has a 5:1 lifting power ratio, allowing you to lift heavy objects with 1/6th of the force. Able to lift heavy objects easily with…

Photo about Block and tackle lifting equipment on a boat. Image of pulley, vessel, sail - 11944305

A fascinating article that describes how a block and tackle (as well as levers and gears) works!