Egt Table - Cessna 172S NAV III Pilot Operating Handbook

SECTION 4
NORMAL PROCEDURES
CRUISE
(Continued)
CESSNA
MODEL 172S NAV III
LEANING USING EXHAUST GAS TEMPERATURE (EGT)
(Continued)
EGTTABLE
MIXTURE DESCRIPTION
EXHAUST GAS
TEMPERATURE
RECOMMENDED LEAN
50° Rich of Peak EGT
(Pilot's Operating Handbook)
BEST ECONOMY Peak EGT
Figure 4-4
IOperation at peak EGT provides the best fuel economy. This results
in approximately 4% greater range than shown in this handbook
accompanied by approximately a 3 knot decrease in speed.
Under some conditions, engine roughness may occur while
operating at peak EGT. In this case, operate at the Recommended
Lean mixture.
NOTE
• Any change in altitude or power setting will require
a change in the recommended lean mixture setting
and a recheck of the EGT setting .
• The EGT indicators take several seconds, after a
mixture adjustment, to start to show exhaust gas
temperature changes. Finding peak EGT and
adjusting the mixture to the applicable setting
should take approximately one minute when the
adjustments are made carefully and accurately.
Adjusting the mixture quickly is not recommended.
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U.S.
172SPHAUS,03