[TowerTalk] Ginpole for 20 foot sections

[n4kg@juno.com]

More N4KG observations and comments inserted below.  

On Wed, 13 Jun 2001 12:18:30 -0400 "Guy Olinger, K2AV"
<k2av@contesting.com> writes:
> 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.

	The distance traveled is a RESULT of the mechanical
	advantage, NOT the CAUSE, but can be used to calculate
	the mechanical advantage.   N4KG
 
> 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

	Note the presense of MULTIPLE pulleys at the top
	of the block and tackle.  A  GIN pole has only ONE
	pulley at the top.  The only way to get a mechanical
	advantage is to use a SEPARATE block and tackle
	with a SECOND ROPE.  As I said before, this helps
	the puller but does nothing to reduce the load on the
	GIN Pole.   de  Tom  N4KG

> 
> > 
> > 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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