[TowerTalk] Ginpole for 20 foot sections

[Guy Olinger, K2AV]

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>
> 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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