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SECTION 4
NORMAL PROCEDURES
CESSNA
MODEL T210M
For best fuel economy at 70% power or less, the engine should be
operated at six pounds per hour leaner than shown in this handbook and on
the power computer. This will result in approximately 5% greater range
than shown in this handbook accompanied by approximately 4 knots
decrease in speed.
The fuel injection system employed on this engine is considered to be
non-icing. In the event that unusual conditions cause the intake air filter to
become clogged or iced over, an alternate intake air valve opens automati-
cally for the most efficient use of either normal or alternate air, depending
on the amount of filter blockage. Due to the lower intake pressure available
through the alternate air valve or a partially blocked filter, manifold
pressure can decrease up to 10
in.
Hg from a cruise power setting. This
pressure should be recovered by increased throttle setting or higher RPM
as necessary to maintain the desired power. Maximum continuous mani-
fold pressure (35 in. Hg) is available up to 14,000 feet under hot day
conditions using the alternate air source with a fully blocked filter.
LEANING WITH A CESSNA ECONOMY MIXTURE INDICATOR
(EGT)
Exhaust gas temperature (EGT) as shown on the optional Cessna
Economy Mixture Indicator may be used as an aid for mixture leaning in
cruising flight at approximately 80% power or less. To adjust the mixture,
using this indicator, lean to establish the peak EGT as a reference point
and then enrichen the mixture by a desired increment based on data in
figure 4-4.
Continuous operation at peak EGT is authorized only at
70%
power or
less. This best economy mixture setting results in approximately 5%
greater range than shown in this handbook accompanied by
approximate-
ly 4 knots decrease in speed.
MIXTURE
EXHAUST GAS
DESCRIPTION
TEMPERATURE
RECOMMENDED LEAN
(Pilot's Operating Handbook
50°F Rich of Peak EGT
and Power Computer)
BEST ECONOMY
Peak EGT
(70% Power or Less)
Figure 4-4. EGT Table
4-20
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