In message <200307171611.h6HGBLM31344@matronics.com>, Rob Neils
<RobNeils@aimcomm.com> writes
>
>I used a water-based valve laping compound to open up the brass/bronze
>bushing to allow the steel torque tube to rotate freely.
>
I think it is best to avoid grinding compounds as it is very difficult
to completely remove them and particles can embed in the bronze and lead
to premature wear. I had the same problem and I used a bearing scraper
to free off the bronze bush, using engineers' blue to check progress. I
only removed sufficient bronze to give free movement in the arc in
which the tailplane will be required to move. I found this entirely
satisfactory.
Ken Whiteley
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