W I N G LEVELER
A wing leveler may be installed to augment the lateral and directional
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 and rudder control systems. As the airplane de
viates from a wing level attitude or a given direction, vacuum pressure
in the servo units is increased or relieved as needed to actuate the ailerons
and rudder to oppose the deviations. The rudder action effectively cor
rects adverse yaw induced by the ailerons.
The wing leveler system has manual roll trim capabilities which may
be used 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 rontrol knob "ON".
(3)
"ROLL TRIM:" Control Knob -- Adjust for wings level attitude.
CRUI SE.
(1)
Adjust power and elevator trim for level flight.
(2)
"ROLL TRIM:" Control Knob -- Adjust as desired.
DE SCENT.
(1)
Adjust power and elevator trim for desired speed and rate of
descent.
(2)
"ROLL TRIM" Control Knob - - Adjust as desired.
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