Garmin G5 User Manual page 54

Installation Manual
1.7.4.3 FLIGHT CONTROLS CONFIGURATION PAGE
1.7.4.3.1 G
The GSA 28 based autopilot system is a fully integrated, high performance autopilot
that can control up to three axes of an aircraft. Each GSA 28 servo is also capable
of managing the trim control for its axis. The following four subsections (roll, pitch,
yaw, and trim) are provided to aid the pilot/installer in understanding/configuring the
Garmin GSA 28 autopilot system.
A GMC 30X is required to use the G5 autopilot controls.
Roll Servo
All GSA 28 autopilot systems require a servo to control the roll axis of an aircraft. A
single axis GSA 28 installation that controls only the roll axis is sometimes referred to
as a "wing-leveler".
The roll servo follows roll steering commands from the G5 so the airplane will hold
a desired roll angle, follow a desired heading, or follow the lateral component of a
flight plan.
During the flight test phase of the autopilot checkout, the roll servo aggressiveness
will be adjusted to get the desired in-fight performance. The roll servo gain setting is
used to set the aggressiveness of the roll servo. A larger number will cause the roll
servo to more aggressively control the aircraft, and a smaller number will cause the roll
servo to less aggressively control the aircraft.
Pitch Servo
Most GSA 28 autopilot systems consist of both a roll and pitch servo allowing for
full 2-axis control of the aircraft.
The pitch servo follows vertical guidance commands from the G5 so the airplane will
hold a desired pitch angle, vertical speed, airspeed, or altitude, or follow the vertical
component of a flight plan.
Vertical control of the aircraft is all based on controlling the pitch angle with two
additional sub-modes for vertical speed and airspeed. What this means is that the
basic pitch mode performance must be properly adjusted before changing settings that
adjust the vertical speed and airspeed based modes.
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Garmin G5 User's Manual
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190-02072-00 Rev. B