Learjet 60 - Aileron and Elevator; Flight Controls; Pedal Adjust Switches; Rudder

Learjet60

Pilot's Manual
FLIGHT CONTROLS
W?6~ 5 ~yflam V
FLIGHT SYSTEMS &
AVIONICS
The
primary flight controls (ailerons, elevator, and rudder} are mechan-
ically operated through the control columns, control
wheels, and rud-
der pedals . The flaps and spoilers
are hydraulically operated and
electrically controlled .
Aircraft trim systems (pitch, roll, and yaw) are
electrically operated and controlled .
AILERON AND
ELEVATOR
Movement of the control columns and control wheels is mechanically
translated into elevator and aileron control
surface movement through
systems of cables, pulleys, and push-pull rods
. In addition to aileron
control,
the control wheels incorporate switches that control normal
trim,
pitch-axis interrupt, autopilot and yaw damper
disconnect,
flight
director clear, flight director sync, microphone keying, and nose
wheel
steering engage and disengage circuits . Control wheel
switch functions
are discussed under the applicable
system .
RUDDER
Rudder pedal movement is mechanically translated into rudder control
surface movement
through
a system of
cables, pulleys, and bellcranks .
Nose wheel steering, when
engaged, is electronically controlled by the
pedals and braking may be accomplished by depressing the upper por-
tion of the pedals .
PEDAL ADJUST SWITCHES
The pilot's and copilot's rudder pedals
are
individually adjustable
through the PEDAL
ADJUST switches
on the
pilot's and copilot's out-
board switch
panels . Each
switch
has three positions : FWD, OFF, and
AFT . When either switch is held to the FWD or AFT position, an elec-
trically controlled actuator will move the corresponding
rudder pedals
in the desired direction . The rudder
pedal adjust system operates on 28
VDC
supplied through the 5-amp RUDDER PEDAL ADJUST circuit
breaker on the copilot's circuit breaker panel .
PM-123
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5-1
Change 4