Specifications

SECTION 4 CESSNA
NORMAL PROCEDURES MODEL 172R NAV III
GFC 700 AFCS
U.S.
CRUISE (Continued)
FUEL SAVINGS PROCEDURES FOR FLIGHT TRAINING
OPERATIONS
For best fuel economy during flight training operations, the following
procedures are recommended.
1. After engine start and for all ground operations, set the throttle to
1200 RPM and lean the mixture for maximum RPM. After
leaning, set the throttle to the appropriate RPM for ground
operations. Leave the mixture at this setting until beginning the
BEFORE TAKEOFF checklist. After the BEFORE TAKEOFF
checklist is complete, lean the mixture again as described above
until ready to perform the TAKEOFF checklist.
2. Lean the mixture for maximum RPM during full throttle climbs
above 3000 feet. The mixture may remain leaned (maximum
RPM at full throttle) for practicing maneuvers such as stalls and
slow flight.
3. Lean the mixture for maximum RPM during all operations at any
altitude, including those below 3000 feet, when using 80% or
less power.
NOTE
• When cruising or maneuvering at 80% power or less, the
mixture may be further leaned until the EGT indicator
peaks and is then enrichened 50°F. This is especially
applicable to cross-country training flights, but should be
practiced during transition flight to and from the practice
area as well.
• Using the above recommended procedures can provide
fuel savings in excess of 5% when compared to typical
training operations at full rich mixture. In addition, the
above procedures will minimize spark plug fouling since
the reduction in fuel consumption results in a
proportional reduction in tetraethyl lead passing through
the engine.
(Continued Next Page)
172RPHBUS-00
4-38