TM 55-6930-212-102-83. VIBRATION SIMULATION.2-84. An electrohydraulic seat shaker transmits vibrational effects to the trainees, but its effects are isolated from othercompartment-mounted hardware and other simulator occupants.2-85. COCKPITINSTRUMENTATIONSIMULATION .2-86. All cockpit instruments and controls are modified actual aircraft instruments that accept outputs from dc analogcircuitry under computer control and respond with the desired deflections or rotations. Three basic types of circuitry areused to drive the following classes of instruments:Meter movement instrumentsServo instrumentsSynchro instruments2-87. RADIO COMMUNICATION AND INTERCOMMUNICATION SYSTEM SIMULATION.2-88. An internal communication system (ICS) under computer control directs audio signals by means of C-6533/ARCcontrol panels for:Trainee to traineeIOS to observerTrainee to IOSTrainee to observerIOS to traineeIOS to computer roomObserver to IOSComputer room to IOSNOTEThe simulator C-6533 ICS operates identically to that in the helicopter. The observer stationICS control box switches must be in the following positions for the instructor to observecommunication: (1) all toggle switches down/OFF; and (2) selector switch on position 5.The IOS C-6533 ICS control box switches must be in the following positions for total IOScommunication functions: (1) toggle switches 1 through 5 up/ON; (2) AUX and NAV switchesdown/OFF; and (3) selector switch on position 5.2-89. MALFUNCTION SIMULATION.2-90. Approximately 220 malfunctions can be inserted by the instructor. Malfunctions are realistic, and they provide thepilot and copilot with meaningful training in emergency responses.2-91. CONTROL LOADING.2-92. The control loading system provides a realistic and responsive feel to the simulated helicopter flight controls.Electrohydraulic units, combined with a mechanical linkage system, produce initiating and reactive forces for thecontrols. Simulation computer feedback causes the appropriate motions of the aircraft in flight. During a demonstrationplayback, the cockpit flight controls are driven by the computer and appropriately positioned in response to aircraftmotion.2-17/(2-18 blank)
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