Cessna 1973 172 - Enroute Climb; Climb Data; Climb Speeds; Cruise

ENROUTE CLIMB. ^
CLIMB DATA.
NOTE
Steep climbs at low speeds should be of short duration
to improve engine cooling.
CRUISE.
Normal cruising is done between 65% and 75% power. The power
settings required to obtain these powers at various altitudes and outside
air temperatmres can be determined by using your Cessna Power Com-
puter or the OPERATIONAL DATA, Section VI.
Cruising can be done more efficiently at high altitudes because of
lower air density and therefore higher true airspeeds for the same power.
This is illustrated in the table below, which shows performance at 75%
power at various altitudes. All figures are based on lean mixture, 38
gallons of fuel (no reserve), zero wind, standard atmospheric conditions,
and 2300 pounds gross weight.
To achieve the lean mixture fuel consumption figures shown in Sec-
tion VI, the mixture should be leaned as follows: pull mixture control
out until engine RPM peaks and begins to fall off, then enrichen slightly
back to peak RPM.
Carburetor ice, as evidenced by an unexplained drop in RPM, can be
removed by application of full carburetor heat. Upon regaining the origi-
2-14
For detailed data, refer to the Maximum Rate-Of-Climb Data chart
in Section VI.
CLIMB SPEEDS.
Normal climbs are performed at 80 to 90 MPH with flaps up and full ^
throttle for best engine cooling. The mixture should be full rich below ^
3000 feet and may be leaned above 3000 feet for smoother engine opera-
tion. The maximum rate-of-climb speeds range from 90 MPH at sea ^
level to 79 MPH at 10, 000 feet. If an enroute obstruction dictates the
use of a steep climb angle, climb at 75 MPH with flaps retracted.
r