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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