[TowerTalk] Ham IV Rotor

[Fred Mott]

Here's what I could find.  Fred Mott, AB8AH

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Re: [TowerTalk] Ham IV Rotor
from [Brad Pioveson] [Permanent Link][Original] 

To:  "Tim G. Boerresen" <tim at sunsite.lv>, <towertalk at contesting.com> 
Subject:  Re: [TowerTalk] Ham IV Rotor 
From:  "Brad Pioveson" <w9fx at verizon.net> 
Reply-to:  Brad Pioveson <w9fx at verizon.net> 
Date:  Fri, 21 Oct 2005 13:00:02 -0500 
List-post:  <mailto:towertalk at contesting.com> 

Tim, in the old Ham II rotor manual, CDE stated the following:

"With 98 ball bearings operating in accurately machined races, the rotor is 
capable of handling as much as a thousand pounds of downward pressure in 
line with the axis of rotation."  This rating refers to balanced weight, 
and, the importance of keeping the weight ". . .in line with the axis of 
rotation. . ." cannot be understated.  The Ham IV's castings (upper and 
lower) have been beefed up a bit since that was written about the Ham II 
series, so, I'd think that this rating is still applicable, if a bit on the 
conservative side.

Additionally, the same manual strongly discusses the benefits of mounting 
the rotor on a flat plate (vs mast mounting), and, stresses the use of a 
thrust bearing.  Failure to do so seriously derates the rotor's ability to 
do it's job (and, survive).

Hope this helps.

73,