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[TowerTalk] refurbish a Thrust bearing ?

To: <towertalk@contesting.com>
Subject: [TowerTalk] refurbish a Thrust bearing ?
From: w2up@mindspring.com (Barry Kutner)
Date: Sat, 12 Sep 1998 15:12:24 +0100


On 12 Sep 98,, K7LXC@aol.com <K7LXC@aol.com> wrote:

> 
> In a message dated 98-09-12 10:37:12 EDT, n7ex@athenet.net writes:
> 
> > 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.
> >  
>       The mast is the lever arm and the pivot point is where it contacts the
> top of the tower. The mast and antenna load is trying to pry the bottom of the
> mast that's attaced to the rotator in the opposite direction with LOTS of side
> force. 
> 
> Cheers,  Steve   K7LXC

PEs out there, correct me if I'm wrong...
It seems to me the vertical load on the rotor, as in case 1 and 2 
above, has no effect on the side load forces (cosine of 90 = 0), 
assuming the thrust bearing is the pivot point of the system.
73 Barry
--
Barry Kutner, W2UP              Internet: w2up@mindspring.com
Newtown, PA         FRC         alternate: barry@w2up.wells.com

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