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<< Lancair Builders' Mail List >>
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Per,
1. How is the aircraft equipped (cockpit contolled trim for aileron and/or
rudder?) and does it include instrumentation such as attitude indicator and
slip/skid ball?
2. If instrumented as above, were the instruments and wings (dihederal,
incidence and empennage) calibrated against the same standard -- lateral
level across longerons at the main spar, longitudinal level parallel to
longeron tops at same location, center line from center of firewall to center
of tail at vertical spar? Distance of each wingtip to center of tail the
same?
3. How many flight hours do you have in the plane?
4. Has rigging been checked with ruler and digital level? Aileron up and
down at book values and equal from side to side? Is rudder vertically
symmetric so it is not acting like a lifting wing inducing yaw? Do you get
full right rudder deflection? Is it small tail? Is the inboard trailing
edge of the flaps, in reflex position, the same distance below the level
longerons? Have you experienced the same roll moment with partial flaps? Do
the flaps descend to full flaps at the same rate -- at 20 degrees down, they
are both at 20 degrees down, etc? Has wing washout been checked?
Note: Almost all small tail 320s will have a left turning tendency during a
no-wind, level ground taxi. At takeoff roll, there will be a strong left
turning tendency generally not resolved by full right rudder deflection until
about 40 knots is reached -- Start the takeoff roll with slow constant
application of throttle. At climb, heavy right rudder application will be
necessary to keep the ball centered. At high cruise, the airplane may
require left rudder to keep the ball centered.
After verifying rigging, Have you experimented with unbalanced fuel loads or
a right seat passenger to eliminate or reduce the left rolling tendency (4 US
gallons more fuel in the right wing, wings somewhat full of fuel, is
approximately equivalent to moment of 170 lb passenger)? How about
adjustments to flap rigging? With these experiments, can you fly hands off?
Scott Krueger
N92EX
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