Garmin G1000 Diamond DA42NG User Manual

190-00962-02 Rev. A
Garmin G1000 Pilot’s Guide for the Diamond DA42NG
455
AUTOMATIC FLIGHT CONTROL SYSTEM
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
7.5 AUTOPILOT AND YAW DAMPER OPERATION
NOTE: Refer to the AFM for specific instructions regarding emergency procedures.
Theautopilotandyawdamperoperateightcontrolsurfaceservostoprovideautomaticightcontrol.The
autopilotcontrolstheaircraftpitchandrollattitudesfollowingcommandsreceivedfromtheightdirector.Pitch
autotrim provides trim commands to the pitch trim servo to relieve any sustained effort required by the pitch
servo. The yaw damper reduces Dutch roll tendencies and coordinates turns.
FLIGHT CONTROL
Pitchandrollcommandsareprovidedtotheservos,basedontheactiveightdirectormodes.Servomotor
controllimitsthemaximumservospeedandtorque.Theservomountsareequippedwithslip-clutchessetto
certain values. This allows the servos to be overridden in case of an emergency.
PITCH AXIS AND PITCH TRIM
The autopilot pitch axis uses pitch rate to stabilize the aircraft pitch attitude during upsets and ight
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 servo. The pitch trim servo commands the motor to reduce the average
pitch servo effort.
Whentheautopilotisnotengaged,thepitch trim servo may be used to providemanual electric trim.
Thisallowstheaircrafttobetrimmedusingacontrolstickswitchratherthanthetrimwheel.Manualtrim
commands are generated only when both halves of the MEPT Switch are operated simultaneously. Trim
speeds are scheduled with airspeed to provide more consistent response.
ROLL AXIS
The autopilot roll axis uses roll rate to stabilize aircraft roll attitude during upsets and ight director
maneuvers.Theightdirectorrollcommandsarerate-andattitude-limited,combinedwithrolldamper
control, and sent to the roll servo motor.
YAW AXIS
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.  Yaw damper operation is independent of autopilot
engagement.

Garmin G1000 Diamond DA42NG Specifications

General

Display Type	LCD
Resolution	1024 x 768 pixels
Manufacturer	Garmin
Aircraft	Diamond DA42NG
Primary Flight Display (PFD)	Yes
Multi-Function Display (MFD)	Yes
Audio Panel	Yes, integrated
Operating System	Proprietary
Weather Radar	Optional
Power Supply	28 VDC
Screen Size	10.4 inches
Number of Displays	2
AHRS	Yes
Air Data Computer (ADC)	Yes
GPS	Yes
Transponder	Yes
Input Method	knobs
Navigation	VOR, ILS, GPS
Traffic Avoidance	TAS/TCAS
Terrain Awareness	Yes, TAWS