Cessna Skyhawk 172N Pilot Operating Handbook page 69

CESSNA
SECTION 4
MODEL 172N
NORMAL PROCEDURES
accelerate the engine several times to higher engine RPM.
If
the engine
accelerates smoothly and the oil pressure remains normal and steady, the
airplane is ready for takeoff.
FLIGHT OPERATIONS
Takeoff is made normally with carburetor heat off. Avoid excessive
leaning in cruise.
Carburetor heat may be used to overcome any occasional engine
roughness due to ice.
When operating in temperatures below -18°C, avoid using partial
carburetor heat. Partial heat may increase the carburetor air temperature
to the 0° to 21°C range, where icing is critical under certain atmospheric
conditions.
HOT WEATHER OPERATION
Refer to the general warm temperature starting information under
Starting Engine in this section. Avoid prolonged engine operation on the
ground.
NOISE ABATEMENT
Increased emphasis on improving the quality of our environment
requires renewed effort on the part of all pilots to minimize the effect of
airplane noise on the public.
We, as pilots, can demonstrate our concern for environmental im ­
provement, by application of the following suggested procedures, and
thereby tend to build public support for aviation:
1. Pilots operating aircraft under VFR over outdoor assemblies of
persons, recreational and park areas, and other noise-sensitive
areas should make every effort to fly not less than 2000 feet above
the surface, weather permitting, even though flight at a lower level
may be consistent with the provisions of government regulations.
2. During departure from or approach to an airport, climb after
takeoff and descent for landing should be made so as to avoid
prolonged flight at low altitude near noise-sensitive areas.
NOTE
The above recommended procedures do not apply where
1 July 1978
4-23