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Posted for "Don Skeele" <dpske@teleport.com>:
Had an unsettling experience at the recent Arlington Airshow. There were
several Lancairs there and some really beautiful machines, but a couple of
them had considerable looseness in their aileron, elevator control
linkage. One owner causally remarked that he could see the aileron flutter
in flight, A BUMMER.
I believe we have a better than average safety record, but as our beasts
age, they can get cranky and develop wear in the most ingenious
places. The three control systems are the most critical and because our
A/C are fast they are more intolerant of control looseness.
Hold the ailerons/elevators and move the stick to check looseness, if you
have any play, you are on the way toward more of it and perhaps destructive
flutter now or later.
The flaps MAY not be as critical as they are usually not in a neutral
position and move through neutral less often. In flight,( with all else
quiet, radios etc) at cruise and in the more importantly in the "yellow"
zone airspeeds, see if you can get a rumble or a buzzing sound or feeling
from the A/C by moving each of the controls through its neutral point in
the airstream. In my beast a loose left outboard elevator hinge produced a
buzzing sound; that fixed with a new hinge, later, a loose elevator control
horn produced a rumble, fixed that with a larger bolt, rod end bearing, and
a reamed one size hole (AN-3 to AN-4) control horn. And now, I have an
almost imperceptable click in the forward Bellcrank, and it doesn't get
easier to fix.
Talked with Don Getz today to try to stir up some interest for the Redmond
Get together Labor Day weekend..A forum/ BS Session. Whatever.. Regards
to all.
Don Skeele A&P, N320J
a 235/320 with 600 hrs.
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Please send your photos and drawings to marvkaye@olsusa.com.
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