Textron Cessna 172R, Pilot Operating Handbook

Page: 137 / 500

CESSNA
MODEL 172R SECTION 4
NORMAL PROCEDURES
WING FLAP SETTINGS
Normal
takeoffs
are
accomplished with wing flaps
0°-10°. Using
10° wing flaps reduces the
ground
roll and total
distance over an
obstacle by approximately 10 percent. Flap deflections
greater
than
10°
are
not approved for takeoff. If 10° wing flaps are
used
for takeoff, they should be left
down until all obstacles are cleared
and a safe flap retraction speed of 60 KIAS is
reached. On a short
field,
10° wing flaps and
an
obstacle clearance speed
of 57 KIAS
should be used.
Soft or rough field
takeoffs
are
performed with 1
0° flaps
by
lifting
the airplane off the ground as soon as practical in a slightly
tail low
attitude. If no obstacles are
ahead, the airplane should
be leveled
off immediately
to
accelerate
to
a
higher climb speed. When
departing a soft field with an
aft
C.G. loading, the
elevator trim
should be adjusted towards the
nose down direction
to
give
comfortable
control wheel forces during the
initial climb.
CROSSWIND
TAKEOFF
Takeoffs into
strong
crosswind conditions
normally are
performed with the
minimum flap setting necessary for
the field
length,
to minimize the drift angle immediately after takeoff. With
the ailerons
partially deflected into the
wind, the airplane is
accelerated
to
a speed slightly higher than
normal, then pulled off
briskly
to prevent possible settling back to the runway
while drifting.
When clear of the ground, make a
coordinated
turn
into the
wind
to
correct
for drift.
Normal
enroute
climbs are
performed with flaps up
and full
I
throttle and at speeds 5
to 10 knots higher than
best rate-of-climb
I
speeds for the best combination
of performance, visibility and
engine cooling. The mixture should
be full rich below 3000
feet
I
and may be leaned above 3000
feet for smoother operation or to
obtain
maximum RPM.
For maximum rate of climb, use the
best
rate-of-climb speeds shown
in the Rate of Climb
chart
in Section
5.
If an
obstruction dictates the use
of
a
steep
climb angle, the best
angle-of-climb speed should
be used with flaps up
and maximum
power. Climbs
at speeds lower than the best rate-of-climb speed
should be of short duration to
improve engine cooling.
ENROUTE CLIMB
Revision 7
4-25
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