Textron Cessna 172R - Introduction; Sample Problem; Use of Performance Charts

CESSNA
MODEL
172R
SECTION
5
PERFORMANCE
INTRODUCTION
Performance
data
charts
on
the
following
pages
are
presented
so
that
you
may
know
what
to
expect
from
the
airplane
under
various
f
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
approximating
average
piloting
techniques.
rlt
should
be
noted that
performance
information
presented
in
the
range
and endurance
profile
charts
allows
for
45
minutes
reserve
fuel
at
the
specified
power
setting.
Fuel
flow
data
for
cruise
is
based
on
the
recommended
lean mixture
setting
at
all altitudes.
Some
indeterminate
variables
such
as
mixture
leaning
technique,
fuel
metering
characteristics,
engine
and
propeller
condition,
and
air
turbulence
may
account
for
variations
of
1
0%
or more
in
range
and
(f**'
endurance.
Therefore,
it
is
important
to
utilize
all
available
v
information
to
estimate
the
fuel
required
for
the
particular
flight
and
to
flight
plan
in
a
conservative
manner.
USE
OF
PERFORMANCE
CHARTS
'
Performance
data
is
presented
in
tabular
or
graphical
form
to
illustrate
the
effect
of
different
variables.
Sufficiently
detailed
information
is
provided
in
the
tables
so
that conservative values
can
rbe
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
r
typical
flight.
Assume
the
following
information
has
already
been
determined:
AIRPLANE
CONFIGURATION:
Takeoff
weight
2450
Pounds
Usable
fuel
53
Gallons
TAKEOFF
CONDITIONS:
Field
pressure
altitude
1
500
Feet
Temperature
28°C
(16°C
Above
Standard)
Wind
component
along
runway
12
Knot Headwind
Field
length
3500
Feet
I
Feb
28/00
5-3
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