Cessna 172N - Page 55

CESSNA
MODEL
172N
SECTION
4
NORMAL
PROCEDURES
accelerate to
and
climb
out at an obstacle
clearance
speed of
59 KIAS
with flaps retracted.
This
speed
provides
the best
overall
climb speed
to
clear obstacles
when
taking into
account
the turbulence
often
found
near
ground
level.
The
takeoff
performance
data
provided in
Section
5
is based
on
the
flaps
up configuration.
Minimum
ground
run
takeoffs
are accomplished
using
10o flaps.
If
10o
of
flaps are used
on soft
or rough
fields
with obstacles
ahead,
it is
normally
preferable
to
leave
them
extended
rather than
retract them
in
the
climb
to
the
obstacle.
With 10o
flaps,
use an obstacle
clearance
speed of
55
KIAS.
As soon as
the
obstacle
is cleared,
the flaps may
be
retracted
as
the airplane
accelerates
to
the normal flaps-up
climb-out
speed.
CROSSWIND
IAKEOFF
Takeoffs into
strong
crosswinds
normally are
performed
with
the
min-
imum
flap setting
necessary for
the
field
length to
minimize
the
drift
an-
gle
immediately
after
takeoff.
The airplane
is
accelerated
to a
speed
slightty
higher
than
normal,
then
pulled
off
abruptly to
prevent possible
settling
back
to the
runway while
drifting.
When
clear
of
the
ground,
make
a
coordinated
furn
into
the wind
to correct for
drift.
ENROUTE CLI
MB
Normal
climbs
are
performed
with
flaps
up and
full
throttle and
at
speeds 5 to
10 knots
higher than best
rate-of-climb
speeds
for the best
combination of
performance, visibility
and
engine
cooling.
The mix-
ture should be
full
rich
below
3000
feet and
may
be
leaned
above 3000
feet
for
smoother
operation or
to obtain
maximum RPM.
For
maxi-
mum
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.
CRUISE
Normal
cruising
is
performed
between 55Vo
and
?570
power.
The
engine
RPM and
corresponding
fuel consumption
for
various altitudes
can be deter-
4-1
5