Garmin G1000 Pilot's Manual

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Contents

Garmin G1000 Pilot's Manual Manual pdf 299 page image

190-00595-00 Rev. A Garmin G1000 Pilot’s Guide for Beechcraft A36/G36 7-19AUTOMATIC FLIGHT CONTROL SYSTEM7.4 AUTOPILOT OPERATIONNOTE: Refer to the AFMS for specific instructions regarding emergency procedures.The Beechcraft A36/G36’s autopilot and yaw damper operate flight control surface servos to provide automaticflight control. The autopilot controls the aircraft pitch and roll attitudes following commands received from theflight director. Pitch autotrim provides trim commands to the pitch trim servo to relieve any sustained effortrequired by the pitch servo. The yaw damper reduces Dutch roll tendencies and coordinates turns.FLIGHT CONTROLPitch and roll commands are provided to the servos, based on the active flight director modes. Servo motorcontrol limits the maximum servo speed and torque. The servo mounts are equipped with slip-clutches set tocertain values. This allows the servos to be overridden in case of an emergency.PITCH AXIS AND PITCH TRIMThe autopilot pitch axis uses pitch rate to stabilize the aircraft pitch attitude during upsets and flightdirector maneuvers. Flight director pitch commands are rate- and attitude-limited, combined with pitchdamper control, and sent to the pitch servo motor. The pitch servo measures the output effort (torque) andprovides this signal to the pitch trim servo. The pitch trim servo commands the motor to reduce the averagepitch 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 trimcommands are generated only when both halves of the MET Switch are operated simultaneously. Trim speedsare scheduled with airspeed to provide more consistent response.ROLL AXISThe autopilot roll axis uses roll rate to stabilize aircraft roll attitude during upsets and flight directormaneuvers. The flight director roll commands are rate- and attitude-limited, combined with roll dampercontrol, and sent to the roll servo motor.YAW AXISThe 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 autopilotengagement.