SECTION 4
CESSNA
NORMAL PROCEDURES
MODEL 172S NAV III
SPINS
(Continued)
It is recommended that 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 allowed
for a 1-turn spin and recovery, while a 6-turn spin and recovery may
require somewhat more than twice that amount. For example, the
recommended entry altitude for a 6-turn spin would be 6000 feet
above ground level. In any case, entries should be planned so that
recoveries are completed well above the minimum 1500 feet above
ground level required by FAR 91.303. 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
approached, the elevator control should be smoothly pulled to the
full aft position. Just prior to reaching the stall "break", rudder
control in the desired direction of the spin rotation should be applied
so that full rudder deflection is reached almost simultaneously with
reaching full aft elevator. A slightly greater rate of deceleration than
for normal stall entries, application 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 relaxation 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
turn spin is adequate and should be used. Up to 2 turns, the spin
will progress to a fairly rapid rate of rotation and a steep attitude.
Application of recovery controls will produce prompt recoveries
(within 1/4 turn). During extended spins of two to three turns or
more, the spin will tend to change into a spiral, particularly to the
right. This will be accompanied by an increase in airspeed and
gravity loads on the airplane. If this occurs, recovery should be
accomplished promptly but smoothly by leveling the wings and
recovering from the resulting dive.
(Continued Next Page)
I
4-40 U.S.
172SPHAUS-03
Содержание 172S Skyhawk SP NAV III 2005
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