Textron Cessna 172R, Руководство по эксплуатации для пилотов

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SECTION 4
NORMAL PROCEDURES
CESSNA
MODEL 172R
CRUISE
|
Normal
cruise is
performed between 60%
and
80%
power.
The
engine RPM and corresponding fuel consumption for
various
altitudes
can
be determined by using
the
data in Section 5.
NOTE
Cruising
should be done
at 80%
power as much as
practicable until
a
total of 50
hours has accumulated or oil
consumption has stabilized.
Operation
at
this higher
power
will
ensure proper seating of the rings and is applicable to
new engines, and engines in service following
cylinder
replacement
or
top
overhaul
of
one or more cylinders.
I
The
Cruise Performance charts in Section 5 provide
the pilot with
detailed information concerning the cruise performance of
the Model
172R
in still air. Power and altitude, as well as winds aloft, have
a
strong
influence
on the time and fuel needed to
complete any flight.
The Cruise Performance
Table, Figure 4-3,
illustrates the
true
airspeed and nautical miles per gallon during cruise
for various
altitudes and percent
powers, and
is
based on standard conditions
and
zero wind. This table
should be used
as a
guide, along
with
the available
winds
aloft
information, to
determine the
most
favorable altitude and
power setting for
a given trip. The selection
of cruise
altitude
on
the basis
of the
most
favorable
wind conditions
and the use of low
power settings
are
significant factors that
should
be considered on
every trip to reduce fuel
consumption.
In
addition
to
power settings,
proper leaning techniques also
contribute
to
greater range
and are figured into cruise performance
tables. To achieve
the
recommended lean mixture fuel consumption
I
figures shown in
Section 5, the mixture
should be leaned using the
exhaust gas temperature
(EGT) indicator as noted.
NOTE
|
At lower power it may be
necessary
to
richen the
mixture
slightly
to
obtain smooth operation.
4-26
Revision 7
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