Leerjet 35/36 Developed for Training Purposes 4E-3
February 1998
Flight Controls
Flight Controls
The flight control system in the Learjet 35/36 is separated into
primary flight controls and secondary flight controls.
In addition to primary and secondary flight controls, stall warn-
ing, Mach trim, stick puller (i.e., overspeed), autopilot (AFCS),
and yaw damper systems also affect control of the aircraft.
Primary Flight Controls
Primary flight controls are actuated mechanically through a
system of cables, bellcranks, and pushrods connected to the
control yoke and rudder pedals. These controls permit com-
mand of the aircraft through the roll, pitch, and yaw axes. The
automatic flight control system (AFCS) moves the correspond-
ing control surface by electric servos through clutch pulleys and
cables connected directly to the primary control system.
Ailerons
Ailerons on the outboard trailing edge of each wing provide roll
control of the aircraft mechanically through the control wheel or
automatically by the autopilot roll servo.
The ailerons incorporate balance tabs to reduce the forces
required to position the control surface and an aileron-rudder
interconnect spring system to aid in coordination.
Full range of travel for the ailerons is 18×( ± 1×) up and (±2×)
down. An aileron’s effectiveness is augmented by spoilers that
move in conjunction with the ailerons (i.e., spoileron mode)
when the flaps are fully extended for landing.
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