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MAXIMUM CRUISE SPEED PERFORMANCE
ALTITUDE
6500
8000
10,000
settings required to obtain these powers can be determined by using your
Cessna Power Computer or the OPERATIONAL DATA, Section VI.
The Maximum Cruise Speed Performance table (figure 2-5) shows
that cruising can be done most efficiently at higher altitudes because very
nearly the same cruising speed can be maintained at much less power.
The altitudes in the table reflect the maximum altitudes for each power
2450
listed, using
based on extended range mixture,
wind, standard atmospheric conditions, 2950 pounds gross weight, and
cowl flaps closed.
For greater cruising range at a given throttle setting, select the
lowest engine RPM in the green arc range that wlll give smooth engine
operation.
The cowl flaps should be adjusted to maintain the cylinder
head temperature at approximately two thirds of the normal operating
(green arc) range to assure prolonged engine lUe.
Cruise performance data in this manual and on the power computer is
based on an extended range mixture setting.
in approximately
a negligible loss in airspeed when compared to a bes t power mixture
setting.
An extended range mixture should be established as follows:
(1)
Pull mixture control out slowly until engine becomes rough.
(2)
Enrichen mixture slightly to obtain smooth engine operation;
then further enrichen an equal amount.
A best power mi xture is approximated by advancement of the mixture
2-14
'70 POWER
75
70
65
Figure
RPM and full throttle.
10%
greater range at any particular power setting with
TRUE AIRSPEED
160
158
156
2-5.
All figures in this chart are
60
gallons of fuel (no reserve), zero
This mixture setting results
RANGE
(STD. TANKS)
690
730
775
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