----- Original Message -----
From: "Al Williams" <alwilliams@olywa.net>
To: <towertalk@contesting.com>
Sent: Tuesday, September 04, 2001 7:54 PM
Subject: Re: [TowerTalk] ratings on wire rope
>
> > Picture a pulley up on your tower and you want to pull a 1,000 load
> with a rope that goes through and down to the ground where you're
>going to pull. The load on the pulley is 2,000 pounds - 1,000# on the
>load side and 1,000# on the pull side.
> > >
>
> A questions for the physics experts -- Is it true that in order to pull up
> the 1000 load that the pull will have to be 1000# plus the amount to
> overcome the loss due to the pulley efficiency? What is the efficiency
>for a typical 3 to 5" pulley of various bearing designs?
>
>
>Also, How does the efficiency vary with changing load on the bearing?
> k7puc
>
>
>
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>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
>
>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
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