[TowerTalk] Best mast location?
df3kv at t-online.de
Fri May 14 11:30:02 PDT 2010
I don´t use any thrust bearing at all but a home made slew ring rotator with
the mast flanged to the top of it.
To align two thrust bearings will be quite a task with a heavy mast.
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Thomson
## which is why you should always use TWO thrust bearings. Then you
won't have a sideways load on the rotor at all ! Per Leeson [ dunno if he
got this part right] you take the bending moment where the mast enter's the
top bearing... and divide that number by the distance between the top
and what ever is below it... like a 2nd bearing.. or the rotor. If the
top bearing and next item below it is only 2'... VS 4'...... you can kiss
the top 2'
of the tower goodbye in a big wind storm.
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