Cessna 172P Pilot's Operating Handbook And Flight Manual page 75

CESSNA
MODEL
172P
AIRPLANE
CONFIGUN,ATION
Takeoff weight
Usable
fuel
TAKEOFF. CONDITIONS
Field pressure altitude
Temperature
Wind component along runwa,y
Field length
SECTION
õ
PER,FOR,MANCE
2350
Pounds
40
Gallons
1õ00
Feet
28"C (16'C above
standard)
12
Knot Headwind
3500
Feet
INTRODUCTION
Performanoe data charts
on the
following
pa,ges
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
performa,nce
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 selting.
Some
indeterminate variables
such as
mixture leaning
techniquo,
fuel metering
characteristics, engine
end
propeller condition,
and
air turbulence
ma,y
a,ccount
for variations of
107o
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
ftight
probtem utilizes information from
the
various charts to determine the predicted
performa,nce
da,ta
for
a
typical
ftight.
The
following information is
known:
30
May
1980
5-3