[TowerTalk] Roof top towers

[Greg Gobleman]

>
> Anyone who would design a bearing to have hardened steel balls in a soft
> aluminum race needs to give his Engineering degree back as being
> misrepresentation.
>
> Bill- W4BSG
>
But there must be a reason.  Most of the rotors in use today are built that
way and so are all the so-called outdoor thrust bearings I have seen.
Unless, some of those steel balls aren't so hard and some of those soft
aluminum races aren't so soft.  The TB3 is supposed to run dry and I never
heard anyone ever say they wore one out.  I suspect that there is initial
wear and that acts as a sort of dry lubricant and slows further wear.  But
then, I am no engineer.

73
Greg K9ZM

Arkansas Humor: "Before takin this here mail-order course, I could't even
writ injunear, an now I are one."


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