Garmin G3X Installation Manual page 520

Yaw Damper Configuration
The installer needs to make the following yaw damper configuration selections when setting up the
GSA 28 based yaw damper system. These selections are made in configuration mode using the AP
CONFIG page and the yaw damper setup screen in the autopilot setup menu in normal mode.
Table 31-8 Yaw Damper Autopilot Configuration Settings
Configuration Setting
Max Torque
Servo Gain
Servo Direction
(configuration mode only)
Clutch Monitor
(configuration mode only)
Trim Motor Control
(configuration mode only)
190-01115-01 G3X/G3X Touch Installation Manual - GDU 37X Config and Post Install Checkout
Rev. AA
The GSA 28 yaw damper has a configurable maximum torque setting.
This determines how much torque the servo will output before the
electronic slip clutch begins to slip.
The Max Torque setting should be set high enough to not slip during in
flight air loading, but the torque setting should be low enough for the pilot
to override the autopilot if required.
The Max Torque setting can be adjusted from 10 to 60 inch-pounds in 5
inch-pound steps.
The GSA 28 yaw damper has a configurable servo gain value. This
determines how aggressively the pitch servo will move the rudder surface.
The Servo Gain should be set high enough to properly dampen yaw rates,
but low enough to avoid being overly aggressive in the rudder movements.
The servo gain setting can be adjusted from 0.05 to 10.00 in steps of 0.05.
The GSA 28 yaw damper servo has a configurable servo direction.
The Servo Direction should be set to Normal if the servo arm should move
clockwise to cause a nose left rudder movement.
The Servo Direction should be set to Reverse if the servo arm should
move counterclockwise to cause a nose left rudder movement.
After selecting the proper servo direction, the installer should engage the
yaw damper in normal mode and verify proper rudder response pushing
the tail of the aircraft back and forth.
The GSA 28 yaw damper has the ability to monitor itself for a stuck clutch
situation.
If the servo has a large amount of side loading (typically due to a capstan
installation), this can occasionally lead to invalid stuck clutch failures.
The Clutch Monitor should be enabled for all control arm installations.
The Clutch Monitor can be disabled for capstan installations with larger
side loads to prevent invalid stuck clutch failures.
Note that the user can reset clutch monitor faults by pressing the RESET
softkey on the yaw damper configuration page in configuration mode if an
invalid stuck clutch failure occurs.
The GSA 28 yaw damper has the ability to control an auxiliary rudder trim
motor.
The Trim Motor Control should be enabled if the GSA 28 yaw damper
servo was connected to an auxiliary trim motor.
The Trim Motor Control should be disabled if the GSA 28 yaw damper
servo was not connected to an auxiliary trim motor.
Description
Page 31-68