[TowerTalk] Add on 3" mast brake?

Grant Saviers grants2 at pacbell.net
Mon Nov 14 14:21:15 EST 2022


I should add that the brake isn't needed for start-stop braking, the 
RT21 does than well.  It is intended to prevent wind driven oscillations 
when not being turned.

On 11/14/2022 10:24, Charles Morrison wrote:
> IDEA: Auto/truck disc brake, but instead of hydraulic, make it electric....
> ramp it closed in parallel to the rotor ramping down.
> 
> On Mon, Nov 14, 2022 at 1:18 PM Grant Saviers <grants2 at pacbell.net 
> <mailto:grants2 at pacbell.net>> wrote:
> 
>     My 80m 2L beam is destroying rotators (sm PP and Orion 2800). So far no
>     problems with the beam.
> 
>     What is happening is any backlash in the gear train leads to rotational
>     oscillations from the turbulent high wind at my QTH plateau/ridge and
>     results breaking gear teeth off.  The 375# antenna and 100ft elements
>     provide the momentum/jerk at the stop of movement.
> 
>     So am looking for designs of a secondary brake I can fit inside Rohn 65
>     and retrofits to a 3" mast without taking the antenna down and mast out
>     (big crane work).
> 
>     Any experiences, products, ideas, designs welcome.  My shop is pretty
>     much able to make anything in metal.
> 
>     Grant KZ1W
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