AUTOPILOT-OMNI SWITCH.
When a Nav-O-Matic autopilot is installed with two
compatible omni receivers, an autopilot-omni switch is utilized.
This switch selects the omni receiver to be used for the omni
course sensing function of the autopilot. The switch is mounted
just to the left of the autopilot control unit located at the bottom of
the radio stack in the center of the instrument panel. The switch
positions, labeled "OMNI 1" and "OMNI 2", correspond to the
omni receivers in the radio panel stack.
BOOM MICROPHONE
A boom microphone may be mounted near the upper left corner
of the windshield. Use of the boom microphone allows radio
communication without the necessity of releasing any controls to
handle the normal hand microphone. The microphone keying
switch is a push button located on the left side of the pilot's control
wheel.
STATIC DISCHARGERS
If frequent IFR flights are planned, installation of optional
wick-type static dischargers is recommended to improve radio
communications during flight through dust or various forms of
precipitation (rain, freezing rain, snow or ice crystals). Under
these conditions, the build-up and discharge of static electricity
from the trailing edges of the wings, rudder, stabilator, propeller
tips, and radio antennas can result in loss of usable radio signals
on all communications and navigation radio equipment. Usually
the ADF is first to be affected and VHF communication equipment
is the last to be affected.
Installation of static dischargers reduces interference from
precipitation static, but it is possible to encounter severe
precipitation static conditions which might cause the loss of radio
signals, even with static dischargers installed. Whenever
possible, avoid known severe precipitation areas to prevent loss of
dependable radio signals. If avoidance is impractical, minimize
airspeed and anticipate temporary loss of radio signals while in
these areas.
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