Use Of Performance Charts - Cessna Hawk XP R172K Pilot Operating Handbook

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MODEL
R172K
SF,;C'l\
PERFORM)\\
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 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, en-
gine and propeller condition, and air turbulence may account for varia-
tions of 10% or more in range and endurance. Therefore, it is impor-
tant 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 reasona-
ble accuracy.
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