Cessna 172R, Operating Handbook

Page: 136 / 500

SECTION 4
NORMAL PROCEDURES
CESSNA
MODEL 172R
LANDING LIGHTS
If landing lights are
to
be
used to enhance the visibility of the
airplane in the traffic
pattern
or
enroute,
it is
recommended that only
the taxi light be used. This will extend the service life of the landing
light appreciably.
TAKEOFF
POWER CHECK
It is important
to
check full throttle engine operation early in the
takeoff roll. Any sign of rough engine
operation
or sluggish engine
acceleration is good
cause
for discontinuing the takeoff. If this
occurs, you are justified in making a
thorough full throttle static
runup before another takeoff is attempted. The engine should
run
smoothly and
turn
approximately 2065
-
2165 RPM with mixture
leaned
to
provide maximum RPM.
Full throttle run ups over loose gravel are especially harmful
to
propeller tips. When takeoffs must be made
over a
gravel surface,
it
is very important that the throttle be advanced slowly. This allows
the airplane
to
start rolling
before high RPM is developed, and the
gravel
will
be
blown back of the propeller rather than pulled into it.
When unavoidable small dents
appear
in
the
propeller blades,
they
should be immediately corrected
as described
in
Section
8 under
Propeller Care.
Prior
to
takeoff from fields above 3000 feet
elevation, the mixture
should be leaned
to
give
maximum RPM in a full throttle, static
runup.
After
full throttle is applied, adjust the throttle friction lock
clockwise to prevent
the throttle from creeping back from
a
maximum power position. Similar friction
lock adjustments should
be made as required in other
flight conditions
to
maintain
a
fixed
throttle setting.
4-24
Revision 7