Cessna 182 1973 - Operation

OPERATION.
During
cold
weather
operations,
no
indication
will be
apparent
on
the
oil
temperature
gage
prior
to
take-off if
outside
air
temperatures
are
very
cold.
After
a
suitable
warm-up
period
(2
to
5
minutes
at
1000
RPM),
accelerate
the
engine
several
times
to
higher
engine
RPM.
If
the
engine
accelerates
smoothly
and
the
oil
pressure
remains
normal
and
steady,
the
airplane
is
ready
for
take-off.
Rough
engine
operation
in
cold
weather
can
be
caused
by
a
combina-
tion
of
an
inherently
leaner
mixture
due
to
the dense
air
and
poor
vapori-
zation and
distribution
of
the
fuel-air mixture
to
the
cylinders.
The
effects
of
these conditions
are
especially
noticeable
during operation
on
one
magneto
in
ground
checks
where
only
one
spark
plug
fires
in
each
cylinder.
For
optimum operation
of
the
engine
in
cold
weather,
the
appropriate
use
of
carburetor
heat
is recommended. The
following
procedures
are
indicated
as
a guideline:
(1).
Use
carburetor heat
during
engine
warm-up
and
ground
check.
Full
carburetor
heat
may
be
required
for
temperatures
below
10°F,
whereas
partial
heat
could
be
used
in
temperatures
between
10°F
and
40°F.
(2)
Use
the
minimum
carburetor heat
required
for
smooth
operation
in
take-off, climb,
and
cruise.
NOTE
When
operating
in
sub-zero
temperatures, care
should
be
exercised
when
using
partial
carburetor
heat to
avoid
icing.
Partial
heat
may
raise
the
carburetor
air
temper-
ature
to
the
32°
to
TO°F
range
where
icing
is
critical
under
certain
atmospheric
conditions.
(3)
If the
aircraft is
equipped
with
a
carburetor
air
temperature
gage,
it
can
be
used
as
a
reference
in
maintaining
carburetor
air
temperature
at
or
slightly
above the
top
of
the
yellow
arc
by
appli-
cation
of
carburetor
heat.
(4)
Select
relatively
high
manifold
pressure
and
RPM
settings
for
optimum
mixture
distribution,
and avoid
excessive
manual
leaning
in
cruising
flight.
(5)
Avoid
sudden
throttle
movements
during ground
and
flight
opera-
tion.
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