Cessna 182 1975 Owner's Manual page 29

CRUISE PERFORMANCE
SKYLANE
75% PowER
65% PowER
55% POWER
ALTITUDE TAS
MPG
TAS
MPG
TAS MPG
Sea Level
155 11. 2 148 12. 1 138
13. 5
.
3500
Feet
161
11.
6
152
12. 5
142
13.
9
6500 Feet 165 11.9 156 12.8
145
14.2
Standard
Conditions
Zero Wind
For reduced noise
levels,
it is desirable
to
select
the
lowest
RPM
in
the
green
are
range
for a
given percent power
that
will
provide
smooth
engine operation. The cowl
flaps should
be
opened,
if
necessary,
to
maintain
the
cylinder
head
temperature
at
approximately
two-thirds
of
the
normal
operating
range
(green
arc).
Cruise performance
data in
this
manual
and on
the
power
computer
is
based
on an
extended range mixture
setting.
This mixture
setting
results
in approximately
10°/o
greater range
at
any particular
power setting
with
a
negligible loss in
airspeed
when compared
to
a
best
power
mixture
setting.
An extended
range mixture
should
be
established as follows:
(1) Pull mixture
control
out
slowly
until
engine
becomes rough.
(2)
Push
the
mixture
control
in
slightly
to
obtain smooth
engine
operation;
then
further
enrichen an equal
amount.
A best
power mixture is
approximated
by advancement
of
the
mixture
control
twice
as far from
the threshold
of roughness
as described
by
Step
2.
For best
fuel
economy
at 55°/o
power or less,
the
engine
may be op-
erated
at
the
leanest mixture
that
results in
smooth engine
operation.
This can result
in approximately 10
percent
greater
range
than
shown
in
the
cruise
tables
of
this
manual accompanied
by approximately
7
MPH
decrease in
speed.
2-15