At 11:39 PM 9/11/98 -0600, T A RUSSELL wrote:
>
>Hi Bill,
>
>Why use a thrust bearing at all?
>
>Most rotors can carry several hundred pounds of dead weight
>which helps keep their bearings in their races. If a single
>thrust bearing is used at the top of the tower and it is tightened
>to carry the weight of the mast and antennas, then the side load
>actually increases on the rotor, increasing wear on the races in
>the rotor. NOT a good plan.
Tom
Hmmmm..........
Explain how you would calculate the side loads on the rotator in both cases
below.
First case: The weight of the mast supported by the thrust bearing,
Second case: Weight of the mast supported entirely by the rotator, Assume
the mast has minimal (few thousandths) of play where it goes through the
top of the tower.
Dave
K9NX
>
>de Tom N4KG
>
>
>_____________________________________________________________________
>You don't need to buy Internet access to use free Internet e-mail.
>Get completely free e-mail from Juno at http://www.juno.com
>Or call Juno at (800) 654-JUNO [654-5866]
>
>--
>FAQ on WWW: http://www.contesting.com/towertalkfaq.html
>Submissions: towertalk@contesting.com
>Administrative requests: towertalk-REQUEST@contesting.com
>Problems: owner-towertalk@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|