Re: [TowerTalk] Thrust Bearing for Use with Prop Pitch Rotor

[Patrick <patrick_g@windstream.net>]

I'd double check the need for a down thrust bearing to relieve the 
weight from the PP unit. Kurt Andress the preeminent PP re-purpose guru 
advised me against it.
Patrick        NJ5G


On 3/10/2019 10:16 AM, Mike wrote:
> Hello,
>
> What have others used to take the weight off of a tower mounted prop pitch
> rotor?
>
> Presently, in the final stage of modifying a rescued prop pitch and,
> unfortunately,  it didn't have the triangle bearing plate.  Plan to use a
> couple of Rohn TB3 thrust bearings, one at top of the tower and the other
> approx. 2 ft below the top, but wanted to find out what others successfully
> have used to keep the weight off prop pitch rotors.
>
> The load will consist of a 2" dia. X 1/4" wall X 21 ft chrome molly mast
> plus a homemade 40 m Moxon (approx. 70 lbs) and a 4 el SteppIR (approx. 50
> lbs).
>
> I've review the TT archive for thrust bearings for possible application
> with a prop pitch rotor without any consensus on what to use other than the
> available thrust bearings are not reliable in the long run.
>
>    73,
>    Mike, K4GMH
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