Cessna 152 - Page 164

O-235-N2C
ENGINE
MODEL
152
PILOT'S
OPERATING
HANDBOOK
SUPPLEMENT
For
maximum
rate
of
climb,
use
the
best
rate-of-climb
speeds
shown
in
the
Rate
Of
Climb
chart
in
Section
5
of
the
basic
handbook.
If
an
obstruc-
tion
dictates
the
use
of
a
steep
climb
angle,
the
best
angle-of-climb
speed
should
be
used
with
flaps
up
and
maximum
power.
Climbs
at
speeds
lower
than
the
best
rate-of-climb
speed
should
be
of
short
duration
to
improve
en-
gine
cooling.
CRUISE
Normal
cruising
is
performed
between
55%
and
75%
power.
The
en-
gine
RPM
and
corresponding
fuel
consumption
for
various
altitudes
can
be
determined
by
using
your
Cessna
Power
Computer
or
data
in
Section
5
of
this
supplement.
NOTE
Cruising
should
be
done
at
75%
power
as
much
as
practic-
able
until
a
total
of
50
hours
has
accumulated
or
oil
con-
sumption
has
stabilized.
Operation
at
this
higher
power
will
ensure
proper
seating
of
the
rings
and
is
applicable
to
new
engines,
and
engines
in
service
following
cylinder
re-
placement
or
top
overhaul
of
one
or
more
cylinders.
The
data
in
Section
5
shows
the
increased
range
and
improved
fuel
economy
that
is
obtainable
when
operating
at
lower
power
settings.
The
use
of
lower
power
settings
and
the
selection
of
cruise
altitude
on
the
basis
of
the
most
favorable
wind
conditions
are
significant
factors
that
should
be
considered
on
every
trip
to
reduce
fuel
consumption.
The
Cruise
Performance
Table,
figure
1,
shows
the
true
airspeed
and
nautical
miles
per
gallon
during
cruise
for
various
altitudes
and
percent
powers.
This
table
should
be
used
as
a
guide,
along
with
the
available
winds
aloft
information,
to
determine
the
most
favorable
altitude
and
power
setting
for
a
given
trip.
10
ALTITUDE
2500 Feet
5500 Feet
8500 Feet
Standard Conditions
75% POWER
KTAS
101
103
106
NMPG
16.4
16.9
17.3
65% POWER
KTAS
95
97
99
NMPG
17.6
18.0
18.4
55% POWER
KTAS
87
89
91
NMPG
18.6
19.0
19.4
Zero
Wind
Figure
1.
Cruise
Performance
Table
1
July
1978
Revision
1 -
31
March
1983