Leerjet 35/36 Developed for Training Purposes 4I-11
February 1998
Landing Gear and Brakes
Nosewheel Steering
With the aircraft on the ground and the squat switch relay panel
energized, pressing the STEER LOCK switch energizes the
nosewheel steering system; the green STEER ON light illumi-
nates. Momentarily depressing either control wheel master
switch (i.e., red button) disengages the nosewheel steering.
Holding either master switch depressed engages the nose-
wheel steering; releasing the switch disengages the nosewheel
steering.
Rudder pedal movement, with the master switch depressed,
drives a rudder pedal sensor to initiate nosewheel steering.
The sensor then supplies an electrical signal proportional to
pedal displacement to the computer/amplifier. The computer/
amplifier, in turn, applies a clockwise or counterclockwise sig-
nal to the steering actuator. The steering actuator clutch then
engages; the actuator gear train moves the nosewheel in the
desired direction.
As groundspeed varies, wheel speed inputs from the anti-skid
system modifies nosewheel steering authority. At ground
speeds less than 10 kts, the system provides up to 45× of
travel left or right from neutral. At approximately 45 kts, steering
authority decreases to approximately 8× left or right from neu-
tral.
Wheels and Brakes
The nosewheel carries a chined 18 x 4.4, 10 PR, type VII, tube-
less tire inflated to approximately 105 PSI. Each main gear
wheel carries a tubeless 17.5 x 5.75-8, 12 PR, type VII tire. On
aircraft with SSK-931, each main wheel has an 18 x 5.5, 10
PR, type VII tire. Depending on the aircraft’s MTOGW, main
wheel tire inflation varies from approximately 145 to 160 PSI.
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