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[Towertalk] Re: mast disaster avoidance

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Subject: [Towertalk] Re: mast disaster avoidance
From: (Michael Gilmer, N2MG)
Date: Thu, 11 Jul 2002 21:24:27 -0400
VE7HCB wrote:

> > If you are lifting a 100lb weight with one pulley at the top, you 
> > need 100+ lbs on the other side to lift it.  I would then say 
> > that there is 200+lbs of weight on the pulley.


> > If you are lifting a 100lb weight with 2 pulleys at the top and 
> > one on the load, then you have a mechanical advantage and 
> > need only 1/3 of 100+ lbs to lift the weight (I think that that is 
> > correct, but it is a lot less)  Therefore, the total weight on the 
> > pulley is 100lbs plus the reduced amount hence less.

Yes!  33lb to lift so total force on ginpole is 133lb.  A 66lb reduction!

73 Mike N2MG

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