Cessna T182 1982 Pilot Operating Handbook page 224

19
PILOT'S OPERATING HANDBOOK CESSNA 300A AUTOPILOT
SUPPLEMENT (TYPE AF-395A)
SUPPLEMENT
CESSNA NAVOMATIC
300A AUTOPILOT
(Type AF-395A)
SECTION 1
GENERAL
The Cessna 300A Navomatic is an all electric, single-axis (aileron
control) autopilot system that provides added lateral and directional
stability. Components are a computer-amplifier, a turn coordinator, a
directional gyro, an aileron actuator and a course deviation indicator(s)
incorporating a localizer reversed (BC) indicator light.
Roll and yaw motions of the airplane are sensed by the turn coordina ­
tor gyro. Deviations from the selected heading are sensed by the direction­
al gyro. The computer-amplifier electronically computes the necessary
correction and signals the actuator to move the ailerons to maintain the
airplane in the commanded lateral attitude or heading.
The actuator includes a thermostatic switch which monitors the
operating temperature of the motor. If the temperature becomes abnormal,
the thermostatic switch opens and disengages the autopilot to remove
power from the actuator. After approximately
10
minutes, the switch will
automatically close to reapply power to the actuator and autopilot system.
The 300A Navomatic will also intercept and track a VOR or localizer
course using signals from a VHF navigation receiver.
The operating controls for the Cessna 300A Navomatic are located on
the front panel of the computer-amplifier and on the directional gyro,
shown in Figure 1. The primary function pushbuttons (HDG SEL, N AV
INT, and NAV TRK), are interlocked so that only one function can be
selected at a time. The HI SENS and BACK CRS pushbuttons are not
interlocked so that either or both of these functions can be selected at any
time.
21 August 1981
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