Cessna 152 - Page 65

CESSNA
MODEL
152
INTRODUCTION
SECTION
5
PERFORMANCE
Performance
data
charts
on
the
following
pages
are
presented
so
that
you
may
know
what
to
expect
from
the
airplane
under
various
conditions,
and
also,
to
facilitate
the
planning
of
flights
in
detail
and
with
reasonable
accuracy.
The
data
in
the
charts
has
been
computed
from
actual
flight
tests
with
the
airplane
and
engine
in
good
condition
and
using
average
piloting
techniques.
·
It
should
be
noted
that
the
performance
information
presented
in
the
range
and
endurance
profile
charts
allows
for
45
minutes
reserve
fuel
based
on
45%
power.
Fuel
flow
data
for
cruise
is
based
on
the
recommended
lean
mixture
setting.
Some
indeterminate
variables
such
as
mixture
leaning
technique,
fuel
metering
characteristics,
engine
and
propeller
condition,
and
air
turbulence
may
account
for
variations
of
10%
or
more
in
range
and
endurance.
Therefore,
it
is
important
to
utilize
all
available
information
to
estimate
the
fuel
required
for
the
particular
flight.
USE OF
PERFORMANCE
CHARTS
Performance
data
is
presented
in
tabular
or
graphical
form
to
illus-
trate
the
effect
of
different
variables.
Sufficiently
detailed
information
is
provided
in
the
tables
so
that
conservative
values
can
be
selected
and
used
to
determine
the
particular
performance
figure
with
reasonable
accuracy.
SAMPLE PROBLEM
The
following
sample
flight
problem
utilizes
information
from
the
various
charts
to
determine
the
predicted
performance
data
for
a
typical
flight.
The
following
information
is
known:
AIRPLANE
CONFIGURATION
Takeoff
weight
Usable
fuel
TAKEOFF
CONDITIONS
Field
pressure
altitude
Temperature
Wind
component
a.long
runway
Field
length
1
July
1978
1610Pounds
24.5
Gallons
1500
Feet
28°C (16°C
above
standard)
12
Knot
Headwind
3500
Feet
5-3