The reduction mechanism of a ganged pulley system is in the number of feet of
rope the worker pulls in as a ratio to the distance the load travels. In a two
to one system the worker pulls 200 feet of rope to lift the object 100 feet,
thus the analog to a lever, and the advantage.
Two to one: rope tied at top block, through pulley at bottom block, through
pulley at top block, to worker.
Three to one: rope tied at bottom block, through pulley at top block, through
pulley at bottom block, through pulley at top block, to worker.
Four to one: rope tied at top block, through pulley at bottom block, through
pulley at top block, through pulley at bottom block, through pulley at top
block, to worker.
73
>
> From: Mike Gilmer - N2MG <n2mg@contesting.com>
To: <towertalk@contesting.com>
> Date: 2001/06/13 Wed AM 09:06:35 EDT
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Ginpole for 20 foot sections
>
> Nothing "magical" about it...
>
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