Fred,
Yes we have installed taper pins and although we haven't flown with them, they
are very secure and there is no play in the system. We did it a little
differently
than described initially. We loctited a tube inside the torque tube as
descirbed and we opened up the original holes to accept the taper pins so they
are horizontal. Since we had the oversize pins in place, there wasn't much
material
left on TP9, so our machine shop made steel rings which were welded in
place on each side of TP9 to provide a reasonable amount of material for the
taper pins. On the outer end, we just installed taper pins thru the nylon
sleeve
like original. Others who have the original 1/4" pins have just replaced
them with taper pins as there is plenty of material available.
We found that removing the torque tube assembly is not difficult just working
through
the access hole on the stbd side and viewing through the little hole at
the base of the vertical fin on the stbd side. The most difficult part is
attaching
the mass balance assembly and pitch push rod to TP9!
Jim Butcher
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