Cessna 1971 Super Skymaster Owner's Manual page 53

POST LIGHT (TYPICALI
SELECTOR SWITCH AND
ON·OFF INDICATOR LIGHT
NAV
AUTOPILOT.OMNI SWITCH
STACK
~----.I---SPEAKER---
_ _ _
~
COM NAV
~
___e-=-p:O'
AUTOPILOT BACK COURSE SELECTOR SWITCH
RADIO SELECTOR SWITCHES
I
BOOM
MICROPHONE
I
AND ON.OFF INDICATOR LIGHT
Figure 7-2.
craft and "NAV 1-2" on all others, is utilized. This switch selects the
omni receiver to be used for the omni course sensing function of the
autopilot. This is accomplished by placing the selector switch in the
pOSition corresponding to the receiver which is to be used.
If the Nav-O-Matic 400A is installed, an additional switch and light
are used on the selector switch panel. They are labeled "AUTOPILOT,
BACK CRS, OFF" and are used in conjunction with the autopilot-omni
switch. In the event of a back course approach, select the omni to
be
used and place the back course selector switch in the "BACK CRS" pOSi­
tion. This should activate the indicator light and cause the omni indicator
to read the same as during a front course approach.
DM£ ADF \Q)
~ ~
SHAKER·PHONE SWITCH (!YPICALI
SWITCHES CONTROL SPEAKER.PHONE
FUNCTION OF COMMUNICATION AND
NAVIGATION EOUIPMENT IN RADIO
ON INSTRUMENT PANEL,
DME ADF
\Q)
e e
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.
I
/
·r·.
.
'
STATIC DISCHARGERS]
If
frequent IFR flights are planned, installation of optional static dis­
chargers 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, rudders, eleva­
tor, 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 preCipi­
tation 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 precipi­
tation 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.
7-11
7-10