CESSNA
MODEL 172S
Total distance to clear a
50-foot obstacle, zero wind
. Decrease in total distance
(2190 feet X 13%)
Corrected total distance
to clear 50-foot 'obstacle
CRUISE
SECTION 5
PERFORMANCE
2190
1905 Feet
The.
cruising
altitude.
should
be
selected
based
on
a
consideration
of. trip
length,
winds
aloft,
and
the
airplane's
performance.
A typical
cruising
altitude
and the expected
wind
enroute
have been given for this sample
problem .. However,
the
power setting
selection
for cruise
must. be determined
based on
several
considerations.
These
include
the
cruise
performance
characteristics
presented
in Figure
5-8, the
range
profile
chart
presented in Figure 5-9, and the enduran'ce profile chart presented
in Figure 5-10.
The relationship
between power and range is illustrated by the
range profile
chart. Considerable
fuel savings
and longer
range
result when lower power settings are used. For this sample problem,
a cruise power of approximately 65% will be used.
The cruise performance chart, Figure 5-8, is entered at 8000 feet
pressure
altitude
and 20°C
above
standard
temperature.
These.
values most nearly correspond to the planned altitude and expected.
temperature
conditions.
The engine speed .chosen is 2600 RPM,
which results in the following:
.
Revision 4
Power
True airspeed
Cruise fuel flow
64%
117 Knots
8.9 GPH
5-5
Содержание Cessna 172S Skyhawk SP
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