WING
LEVELER
A wing leveler may be installed to augment the lateral stability of the
airplane. The
system
uses
the Turn Coordinator for
roll
and yaw
sensing.
Vacuum pressure, from the engine-driven vacuum pump, is routed from
the Turn Coordinator to cylinder-piston
servo
units attached to the aileron
control system. As the aircraft
deviates
from a wing level attitude,
vacuum
pressure
in the
servo
imits is
increased
or relieved as
needed
to actuate the ailerons to
oppose
the deviations.
A separately moimted push-pull control knob, labeled WING LVLR,
is provided on the left
side
of the instrument panel to
turn
the
system
on
and off. A ROLL TRIM control knob on the Turn Coordinator is
used
for
manual
roll
trim
control to
compensate
for asymmetrical loading of fuel
and
passengers,
and to optimize
system
performance
in climb, cruise
and let-down.
OPERATING
CHECK
LIST
TAKE-OFF.
(1) WING LVLR Control Knob —
Check
in off position
(full
in).
CLIMB.
(1) Adjust elevator
trim
for climb.
(2) WING LVLR Control Knob —
Pull
control knob ON.
(3) ROLL TRIM Control Knob — Adjust for wings level attitude.
CRUISE.
(1) Adjust
power
and elevator
trim
for level
flight.
(2) ROLL TRIM Control Knob — Adjust as desired.
DESCENT.
(1) Adjust
power
and elevator
trim
for desired
speed
and rate of
descent.
(2) ROLL TRIM Control Knob — Adjust as desired.
7-5
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