[TowerTalk] Help needed testing a rotor

[Steven Katz]

Yes, but weight isn't important; wind area is, and how strong the winds are, and how often they change direction, and how often you start and stop the motor...15 years is about the most I ever got out of a CD-45 with an HF beam or longer-boom VHF antenna.

HAM-IV with a brake, or better still anything with a worm gear drive (which normally needs no brake) last much longer.

-----Original Message-----
From: Eric Rosenberg <ericrosenberg.dc at gmail.com> 
Sent: Thursday, December 20, 2018 10:30 AM
To: Steven Katz <stevek at jmr.com>; towertalk at contesting.com
Subject: Re[2]: [TowerTalk] Help needed testing a rotor

Actually, the C3SS light. 27 lbs, 4.4 sq ft wind load.

Been up trouble free for 15 years!

------ Original Message ------
From: "Steven Katz" <stevek at jmr.com>
To: "Eric Rosenberg" <ericrosenberg.dc at gmail.com>; "towertalk at contesting.com" <towertalk at contesting.com>
Sent: 12/20/2018 1:10:50 PM
Subject: RE: [TowerTalk] Help needed testing a rotor

>C3SS is a pretty big load for a CD-45 which has no brake.
>
>-----Original Message-----
>From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Eric 
>Rosenberg
>Sent: Thursday, December 20, 2018 10:08 AM
>To: towertalk at contesting.com
>Subject: [TowerTalk] Help needed testing a rotor
>
>The CD-45 rotor on my roof tower has been getting stuck on an intermittent basis.
>
>The rotor sits about 3 feet from the top of the roof tower, where 
>there's a thrust bearing. The mast extends another 3-feet and holds a
>F12 C3-SS.
>
>When it happens, it's always pointed in roughly the same direction.
>While I can sometimes get it to move after it stops, I usually have to wait some time (later in the day or the next day or so) before it will operate correctly.
>
>It's happened when connected to both the original control box (with Rotor-EZ box added) and a DCU-3.  The DCU- 3 flashes "MOTOR" on the screen when it happens.
>
>I haven't done any maintenance in some time, so I am assuming it's the rotor and/or thrust bearing that needs to be re-built or replaced.
>
>Are there any tests I could perform before calling in help, as for medical reasons I can't do this work myself?
>
>Thanks & 73,
>
>Eric W3DQ
>Washington, DC
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