Cessna 172N - Page 58

SECTION
4
NORMAL
PROCEDURES
CESSNA
MODEL
172N
It
is recommended
that,
where
feasible, entries be
accomplished
at
high
enough
altitude
that recoveries
are
completed 4000 feet
or
more
above
ground
level.
At
least
1000
feet
of
altitude
loss should be allorred for a
1- turn
spin
and
recovery,
while
a 6- turn spin and recovery
may
require
somewhat
more
than
twice
that
amount.
For
e>q.mple,
the
recommended
entry
altitude for
a 6- turn
spin
would
be
6000
feet
above
ground
level. In
any
caser
entries
should
be
planned
so
that
recoveries
are
completed
well
above the
minimum
1500
feet
above
ground
level
required
by
FAR
91.
?1.
Another
reason
for
using
high
altitudes
for
practicing
spins is that
a
greater
field
of
view is
provided
which
will assist
in
maintaining
pilot
orientation.
The normal
entry
is made
from
a
power-off
stall.
As
the
stall
is ap-
proached,
the
elevator control
should
be
smoothly
pulled
to the fuil
aft
position.
Just
prior
to reaching
the
stall
rbreak",
rudder control
in
the
desired
direction
of
the
spin
rotation
should be
applied
so
that
fulI
mdder
deflection
is
reached
almost
simultaneously with
reaching fulI
aft
elevator.
A
slightly
greater
rate
of
deceleration than for
normal
stall
entries,
ap-
plication
of
ailerons
in
the
direction
of
the
desired spin, and
the use
of
power
at the entry
will assure
more consistent
and
positive
entries
to
the
spin.
As
the
airplane begins
to
spin,
reduce
the
power
to
idle
and
return
the
ailerons to
neutral.
Both
elevator
and
rudder- controls
should
be held
full
with
the
spin
until the
spin recovery
is initiated.
An
inadvertent
relur-
ation
of either
of these
controls
could result
in
the development
of
a nose-
down
spiral.
For
the
purpose
of
training
in spins and
spin
recoveries,
a 1 or 2
furn
spin
is adequate
and
should be used. Up to 2 furns,
the
spin
will
pro-
gress
to
a
fairly
rapid rate
of
rotation ard a
steep
attitude.
Application
of
recovery
controls
will
produce
prompt
recoveries
(withtn
l/4 hrrn).
Dur-
irg extended
spins of two
to
three
turns or more,
the
spin
will
tend to
charge
into a
spiral,
particularly
to
the right.
This
wiU
be
accompanied
by an
increase
in airspeed
and
gravity
loads on
the airplane.
If
this oc-
curs,
recovery
should
be
accomplished
quickly
by leveling
the wings and
recovering
from the
resulting
dive.
Regardless
of
how
many
furns the
spin
is
held
or
how
it
is entered,
the
following
recovery
technique
should be
used:
(1)
VERIFY
THAT
THROTTLE
Is IN
IDLE PoSITIoN
AND AILERoNS
ARE NEIITRAL.
(2)
APPLY
AND
HOLD
FULL
RUDDER OPPOSITE
TO THE DIREC-
TION
OF ROTATIOJI-
(3)
JUsr AFTER
TIm
RUDDER
REAcHES
THE
srop,
MovE
THE
CONTROTifrE.EE.I,
BRISKLY
FoRwARD FAR ENcIJGH To BREAK
THE
STALL.
4-18