CESSNA
MODEL 172S
SECTION 5
PERFORMANCE
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INTRODUCTION
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 approximating average piloting techniques.
It should be noted that performance
information presented in the
range and endurance
profile charts allows for 45 minutes reserve
fuel at the specified power selling. Fuel flow data for cruise is based
on the .recommended
lean mixture selling .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 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 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
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. Assume
the following
information
has already been
determined:
AIRPLANE CONFIGURATION:
Takeoff weight
Usable fuel
TAKEOFF CONDITIONS:
Field pressure altitude
Temperature
Wind component along runway
Field length
July 8/98
2550 Pounds
53 Gallons
1500 Feet.
28°C (16°C Above
Standard)
12 Knot Headwind
3500 Feet
5-3
Содержание Cessna 172S Skyhawk SP
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