[TowerTalk] Rotor replacement

[Don Havlicek]

Barry,
Take a piece of angle iron with two u-bolts on it, one for the mast, and 
one for a tower leg.  Attach it above the rotor.  Then you won't have to 
worry about that 4.3 degrees at all.
Don
N8DE

Barry wrote:
> Hi all,
> My Tailtwister has been acting up a bit (not bad for 13 years in 
> service) and I want to replace it with a spare I have.  It is mounted 
> down about 8 ft from the top flat plate (with a TB-3 bearing) in a 
> Rohn 45.  The mast is about 20 ft long with a TH7 up 6 inches and a 
> 40-2CD at the top, about 9 ft above the TH7.
> 
> I want to make this as simple as possible, so have thought of the 
> following procedure:
> If I simply remove the rotor from the plate, without doing anything 
> with the antennas or mast, the mast will lean until it hits a horiz. 
> strut on the a wall, which is a max. of 7.25 inches from center.  
> With 8 ft of mast below the TB-3, this amounts to a 4.3 degree 
> deflection (if my math is correct).  
> 
> Questions:
> 1. Is there enough play in the TB-3 where this 4.3 degree out-of-
> vertical is not a problem with respect to the bearing?
> 2. Assuming the lean is OK,  is there enough clearance between the 
> mast and diagonal struts to slip the rotor out (and the new one in) 
> between them without removing anything else, such as the rotor plate?
> 
> Any other thoughts or ideas to make this as simple as possible for a 
> one-man job, without jacking up the mast, etc?
> 
> Tnx,
> Barry W2UP--
> Barry Kutner, W2UP              Internet: w2up at mindspring.com
> Newtown, PA                     Frankford Radio Club
>         
> 
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