Textron Aviation Cessna 172S NAV III Skyhawk SP, Information Manual

Page: 161 / 490

CESSNA SECTION 5
MODEL 172S NAV III PERFORMANCE
KAP 140 AUTOPILOT
U.S.
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 to facilitate the planning of flights in detail 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 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 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.
172SPHAUS-05 5-3
For
Training
Purposes
Only