[TowerTalk] Biggest rotor that will fit in a Rohn 25G

[Steve Maki]

On 7/20/2016 17:26 PM, Bill Tippett wrote:
> K8RI:  > A heavy duty rotator with a large antenna should be mounted well
> down into the tower. Mounted at the top, in the tapered section would
> likely put very high stress at that point.
>
> I mounted my rotator at the same point in 45G and had no problems for >10
> years with the antennas/wind speeds in Colorado described previously.  If
> still concerned, you could mount a straight 25G section above a straight
> 25AG4 and install the rotator in the 16" window.  Of course this would
> require a long mast (~15').  I don't know which LPDA Jeff is considering
> but I doubt it's >32 sq. ft.

And besides, the rotational torque will be resisted by z-braced sections 
below the rotator.

The only concern with the normal R25 rotator mounting position is 
lateral loads encountered with tall masts. I've seen pointy top sections 
fold over in that scenario.

-Steve K8LX