(b)
Feel force is the resistance to rudder pedal movement experienced by the flight crew. This force is produced by spring tension when the roller is forced to climb the inclined surface of the cam plate. An initial feel force of about 14 pounds (62 Newtons) increases to approximately 72 pounds (320 Newtons) at full rudder deflection.
(c)
The rod end of the trim actuator is connected to the lower spring arm of the cam roller assembly. As the actuator extends/retracts, the spring arms are forced to rotate about the bearing mount on the cam. The roller in the lower spring arm is held in the cam detent by the spring force. The cam is forced to follow the roller movement, causing the torque tube to rotate.
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757
MAINTENANCE MANUAL
(SHT 2)
Y
28V ACFLIGHT
Z
RUD
L BUSCX RECORDER
X
RUDDER POS RUDDER POSITION
EICAS CMPTR RUDDER TRIMXMTR
INDICATOR
28V AC
L BUS
FLIGHT CONTROLS
RUDDER TRIM POS
25` RRETRACT28V DC15` R
STBY BUS
FLIGHT CONTROLS
RUDDER TRIM
5` R
M P11 BRAKE
NOSE ROFFPEDAL
NOSE L ADJUSTMENTCRANK
5` LEXTEND 15` LRUDDER TRIM
ACTUATOR
PEDAL
ADJUSTMENT
25` L CRANK
FIRST OFFICERS
RUDDER PEDALS
RUDDER TRIM CONTROL SW RUDDER TRIMACTUATOR
(SHT 2)12
AILERON/RUDDER TRIMRIG PIN
CONTROL PANELR1B
CAPTAINS
RUDDER
RIG PIN PEDALS R3
RIG PIN PEDAL ADJUSTMENT
R1A
MECHANISM
RIG PIN
R2
FEEL ANDRA FORWARD QUADRANT
CENTERINGSPRINGS RB
R ROLLOUTGUIDANCEA/P SERVO
L ROLLOUT
WHEEL BRAKEFWD GUIDANCE
ACTUATINGA/P SERVO
LINKAGE
FWD CENTER ROLLOUTGUIDANCE A/P SERVO
Rudder and Rudder Trim Control System
Figure 12 (Sheet 1)
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757
MAINTENANCE MANUAL
VERTICAL
STABILIZER
REAR SPAR
REACTION LINK
UPPER RUDDER POWER CONTROL ACTUATOR
C RUDDER HINGE
L
MIDDLE RUDDER PCA
LOWER RUDDER PCA
YAW DAMPERS SUMMING LINKAGE
CENTERING AND
BIAS POGO
RIG PIN R8
LEFT YAW
DAMPER SERVO
ACTUATOR
RIGHT YAW DAMPER SERVO ACTUATOR
RIG PIN
R7
RUDDER RATIO CHANGER ACTUATOR
12 (SHT 1)
RUDDER APPROXIMATE TRAVELS:
LOW SPEED |30.6`
HIGH SPEED |3.5`
RUDDER POSITION
TRANSMITTER
(SHT 1)
PRIMARY
CONTROL PATH
SECONDARY CONTROL PATH RATIO CHANGER POGO ROD
RIG PIN R6 RIG PIN R5
RUDDER RATIO CHANGER LVDT
UP
FWD
Rudder and Rudder Trim Control System
Figure 12 (Sheet 2)
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757
MAINTENANCE MANUAL
SHUTOFF VALVE SHUTOFF VALVE
L HYD SYS R HYD SYS
FOR INTERNALS
LEFTSEECENTERRIGHT
HYDRAULIC
RUDDER RATIOHYDRAULICHYDRAULIC
SYSTEM CHANGER SYSTEM SYSTEM
SCHEMATIC
RUDDER SHUTOFF
RATIO VALVE
CHANGERCHYD
SERVO SYS
PILOTINPUT ENGAGE SOLENOID
TORUDDERCONTROL
H
LLEFT YAW
CONTROL
DAMPER VALVE
H
INTERNALS
TRANSFER
C7
INTERNALS
SAME AS
VALVE L
SAME AS RIGHT YAW
LEFT YAW
H
RUDDER/
UPPER PCA DAMPER
DAMPER
L
ELEVATOR
SERVO
PCUMIDDLEPRESS
MONITORRUDDER
DIFF
SNSR
ACTUATOR SYSTEM
LVDT
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本文链接地址：757 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 1(134)
