[TowerTalk] Ginpole for 20 foot sections

[Michael Tope]

Hi all, 

The gin pole feels a downward force equal to twice the attached load.
Thus the person pulling the rope has a 2:1 advantage in terms of his 
or her ability to push the tower down into the ground. His ability to lift the 
attached load however is 1:1. 

Mike, W4EF.........

----- Original Message ----- 
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>
Sent: Wednesday, June 13, 2001 11:45 AM
Subject: Re: [TowerTalk] Ginpole for 20 foot sections


> 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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List Sponsor: Are you thinking about installing a tower this summer? Call us
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96-feet for less than $2000! at 888-833-3104 <A HREF="http://www.ChampionRadio.com">
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