Quote:
Originally Posted by Aur0r4
Every crane I've ever seen includes operating instructions to leave multiple turns of wire rope on the hoist drums...usually more than 3, sometimes as high as 9. This allows almost all of the force transfer to occur via friction and your mechanical connection doesn't see hardly any load.
Good luck!
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I believe this is because of the Capstan effect:
http://en.wikipedia.org/wiki/Capstan_equation