TRIM SYSTEM
HORIZONTAL STABILIZER TRIM SYSTEMS
General
The variable incidence horizontal stabilizer serves for longitudinal
(pitch) aircraft trim. Two independent electrical trim systems ensure the
ability to trim the aircraft if one system fails.
The stabilizer travel is +2.5° to -9.5° which covers the entire flight and
cg envelopes trim requirements.
Normal System
Trim switches, located on top outboard side of pilot and copilot control
wheels, control normal operation. When either trim switch is moved UP
or DOWN, actuator's primary motor energizes to retract or extend the
actuator to desired position. Limit switches are incorporated in the
actuator to restrict stabilizer travel.
Pitch trim tone (from EICAS) sounds whenever normal system
operates. Autopilot trim is also achieved through the normal system.
Mach Trim
Mach trim is operative when autopilot is disengaged. Mach trim is
activated when ADC mach data indicates that longitudinal trim is
necessary (0.79 M
i
).
Gulfstream G200 - Trim System
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