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SECTION
7
AIRPLANE & SYSTEMS DESCRIPTIONS
CESSNA
MODEL
172N
NOTE
When
transmitting, the
pilot
should key the microphone,
place
the microphone
as
close
as
possible to
the
lips
and
speak
directly into it.
STATIC DISCHARGERS
If
frequent IFR
flights
are planned,
installation
of wick-type static
dischargers
is
recommended
to improve radio communications during
flight
through dust or various forms of preclpitation (rain, snow or
ice
crystals). Under these conditions, the build-up and discharge of static
electricity from
the
trailing
edges of the
wings,
rudder, elevator,
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 precipita-
tion
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
precipita-
tion
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
-40
1
JuIy
1979
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