Flight control system consists of cockpit control, control linkage and flight surfaces. Control linkage or connects manual cockpit controls to the flight surfaces.
Control run consists of different linkage components including:
a) Cockpit levers
b) Push-pull rods, push-pull cables (teleflexes)
c) Pulleys: Drive pulleys, End pulleys
d) Control cables
e) Bell cranks
(f) Torque tube and so on.
The linkage components make different system in the flight control namely:
(1) The cable system
(2) push-pull system, and
(3) the torque tube system.
The cable system is the most widely used because deflections of the structure to which it is attached do not affect its operation. Many aircraft incorporate control systems that are combinations of all three types.
The systems operate the control surfaces, tabs, and flaps include flight control system hardware, linkage, and mechanisms. Included in these systems are cable assemblies, cable guides, linkage, adjustable stops, control surface snubber or locking devices, surface control booster units, actuatorsoperated by electric motors, and actuators operated by hydraulic motors.
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