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Proposed crankup configuration

To: <>
Subject: Proposed crankup configuration
From: (Chad Kurszewski WE9V)
Date: Fri, 03 Jan 1997 16:01:22 -0600
>>>Effective Moment/K-Factor of the TH11DX (weight times turning radius) is
>>>1936; the G800 is rated at 1299 ft-lbs and the Ham IV is 2800 ft-lbs.
>>Is the 1936 ft-lbs actually the published weight of the antenna times the
>>published turning radius??  If so, this sounds grossly extreme and
>>incorrect.  That would be putting the entire weight of the antenna at the
>>end of an arm the length of the turning radius.  Is this a published moment,
>Chadster --
>     The 1936 is correcto mundo and right out of the Hy-Gain catalog.  Why
>would it be gross and extreme?  You're not looking at this from the
>perspective of the rotator; it has to swing an antenna that weighs X and has
>a moment of Y.  It's Effective MOMENT, remember?

Yes, Yes, Yes.

Reported moment....good.

But you mentioned "weight times turning radius", which is NOT moment.
Moment would be    weight times EFFECTIVE radius (or moment arm).
Turning radius has nothing to do with it.  Therefore, I was mondo confused!!

>All of the rotator
>manufacturers are using this kind of a measurement for rotator capacity now
>instead of just a square foot load.  You can imagine two antennas with the
>same square footage but radically different moments on the rotator.

Yes, it's good they are doing this.  Much more meaningful.

Thanks for doing the list.  Since I'm an apartment dweller, I've never
subscribed.  Now that I'm looking into being a tower owner, I'm gobbling
this up!!  (Ummm...I mean home owner.)  :)

Chad Kurszewski, WE9V         e-mail:
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