absorbs some of the force applied to any of
the interconnected r udder pedals until the
nosewheel is rolling. At this time the re-
sisting force is less, and more pedal motion
results in more nosewheel deflection. Since
motion of the pedals is transmitted via ca-
bles and linkage to the r udder, r udder de-
flection occurs when force is applied to the
rudder pedals. With the nose landing gear re-
tracted, some of the force applied to any of
the r udder pedals is absorbed by the spring-
loaded link in the steering system, so that
there is no motion at the nosewheel but r ud-
der deflection still occurs. The nosewheel is
self-centering upon retraction.
W h e n f o r c e o n t h e r u d d e r p e d a l i s a u g -
mented by a main wheel braking action, the
nosewheel deflection can be considerably
increased.
HYDRAULIC LANDING GEAR
The retractable tricycle landing gear (Figure
1 4 - 4 ) i s e l e c t r i c a l l y c o n t r o l l e d a n d hy -
d r a u l i c a l ly a c t u a t e d . T h e s y s t e m u t i l i z e s
folding braces, called “drag legs,” that lock
in place when the gear is fully extended.
The individual landing gear actuators in-
cor porate inter nal/mechanical downlocks
to hold the gear in the fully extended posi-
tion. The landing gear is held in the up po-
sition by hydraulic pressure.
KING AIR C90GTi/C90GTx
PILOT TRAINING MANUAL
14-4
FOR TRAINING PURPOSES ONLY
14
LANDING
GEAR
AND
BRAKES
NOSE
LEFT
RIGHT
NO. 2 APPROACH
LIMIT SWITCH
LEFT
RIGHT
GEAR
HORN
RELAY
IN-TRANSIT
LIGHT RELAY
GEAR
HORN
FLAP
CONTROL
SWITCH
HORN
SILENCE
BUTTON
(CLOSED WHEN
FLAPS UP OR
APPROACH)
LANDING
GEAR
WARNING
HORN
5A
28 VDC
28 VDC
28 VDC
5A
LANDING
GEAR
INDICATOR
LIGHTS
LANDING
GEAR
CONTROL
LANDING
GEAR
CONTROL
HANDLE
2A
NOSE
LEFT
RIGHT
DOWNLOCK SWITCHES
(OPEN WHEN DOWN)
HANDLE LIGHTS
(RED)
POSITION LIGHTS
(GREEN)
DOWNLOCK SWITCHES
(CLOSED WHEN DOWN)
UP
LANDING
GEAR
CONTROL
CIRCUITRY
DOWN
DOWN
DOWNLOCK
SWITCHES
HYDRAULIC
FLOW
CONTROL
SOLENOID
UP LEFT HAND
SAFETY
SWITCH
SERVICE
VALVE
LANDING
GEAR
HYDRAULIC
MOTOR
CONTROL
CIRCUIT
HYDRAULIC
PRESSURE
SWITCH
RIGHT HAND
SAFETY
SWITCH
60A
28 VDC LANDING GEAR
HYDRAULIC
MOTOR POWER
LANDING GEAR
HYDRAULIC
MOTOR PUMP
POWER LEVER
SWITCHES
Figure 14-4. Landing Gear Electrical Schematic
Summary of Contents for C90GTi
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