Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 67 ROTOR FLIGHT CONTROLS The subsystem components that provide a means of manually controlling the flight attitude of the helicopter. Includes control linkage and cables for collective pitch, cyclic pitch, directional control, servo controls and corresponding subsystem. Also includes trim, indicating, and monitoring system. NOTE: This system includes the complete rigging of rotor control including the associated items not described under this system, such as autopilot, servo control unit, automatic trim (see System 22), blade pitch change rod (see System 63), and swashplate.
00 GENERAL 10 ROTOR CONTROL The portion of the system that controls the attitude of the angle of attack of the rotor blades. Includes collective pitch lever, cyclic pitch stick and corresponding linkage, and cable controls, coupling and mixing units, and artificial feel unit system. Also includes the control position indicating system. 20 ANTI-TORQUE ROTOR CONTROL (YAW CONTROL) The portion of the system that controls the direction of the helicopter (yaw control). Includes tail rotor control pedals, relevant linkage and cable controls, bellcranks constituting the yaw control channel, and the control position indicating system.
30 SERVO CONTROL SYSTEM The portion of the system that distributes power source output to the rotor servo control system. Includes pressure relief valves, electronic valves, check valves, accumulators, and equipment needed for the operation of the servo control system; the servo controls; the systems used for monitoring and indicating the operation of the servo control system, etc. 76