Garmin G3X Pilot’s Guide
190-01115-00 Rev. K
300
AFCS
System
Overview
Flight
Instruments
EIS
CNS
Interface
GPS
Navigation
Flight
Planning
Hazar
d
Avoidance
Additional
Featur
es
AFCS
Annun/Alerts
Appendix
Index
of the autopilot and may be used during normal hand-flight maneuvers. Yaw rate
commands are limited to 6 deg/sec by the yaw damper.
FLIGHT CONTROL (GSA 28 AND GMC 305)
Pitch and roll commands are provided to the servos based on the active flight director
modes. Yaw commands are provided by the yaw servo. Servo motor control limits the
maximum servo speed and torque. The servo mounts are equipped with electronic
slip-clutches. Slip-clutch torque values are set at installation, see the G3X installation
manual for installation instructions. This allows the servos to be overridden in case
of an emergency. Third party autopilot systems my not allow servos to be overridden,
consult third party autopilot documents for limitations.
p
itCh
a
XiS
anD
t
riM
The autopilot pitch axis uses pitch rate to stabilize the aircraft pitch attitude during
flight director maneuvers. Flight director pitch commands are rate and attitude-limited,
combined with pitch damper control, and sent to the pitch servo motor. The pitch servo
measures the output effort (torque) and provides this signal to the pitch trim motor.
The pitch trim servo commands the motor to reduce the average pitch servo effort.
NOTE:
Auto-trim may also be configured for the roll and/or yaw axis. Consult
the G3X installation manaul for configuration and installation options.
r
oll
a
XiS
The autopilot roll axis uses roll rate to stabilize aircraft roll attitude during flight
director maneuvers. The flight director roll commands are rate- and attitude-limited,
combined with roll damper control, and sent to the roll servo motor.
y
aw
a
XiS
The yaw damper uses yaw rate and roll attitude to dampen the aircraft’s natural
Dutch roll response. It also uses lateral acceleration to coordinate turns and reduce
or eliminate the need for the pilot to use rudder pedal force to maintain coordinated
flight during climbs and descents.
Summary of Contents for G3X Touch
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