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| | BTM_Block_Tackle (Site not responding. Last check: 2007-11-03) |
 | | A Block and Tackle system gives you a mechanical advantage by distributing the weight, or load, of the object along the length of the line. |
 | | Block and tackle systems are not only a must for such jobs as loading cargo and supplies, lowering and recovering long boats, and hoisting the bosun's chair up the mast, but essential for raising, bracing, and lowering of the sails. |
 | | When raising the chair, sail, or barrel, although the block and tackle system decreases the force needed to move the object up, it increases the amount of line that must be pulled through the blocks. |
| www.ocean-institute.org /edu_programs/materials/P/Equ/E_FG/BTM_Block.htm (431 words) |
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