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CESSNA AIRCRAFT COMPANY
FOR TRAINING USE ONLY
MODEL 152
4-17
The seat belts and shoulder harnesses should be adjusted to provide proper restraint during all
anticipated flight conditions. However, care should be taken to ensure that the pilot can easily reach
the flight controls and produce maximum control travel.
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
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 91.71. 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 or the use of partial power at the entry will assure more consistent and positive entries to
the spin. 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.
NOTE
Careful attention should be taken to assure that the aileron control is
neutral during all phases of the spin since any aileron deflection in the
direction of the spin may alter the spin characteristics by increasing the
rotation rate and changing the pitch attitude.
For the purpose of training in spins and spin recoveries, a 1 to 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 of from 1/4 to 1/2 of a turn.
If the spin is continued beyond the 2 to 3-turn range, some change in character of the spin may be
noted. Rotation rates may vary and some additional sideslip may be felt. Normal recoveries from such
extended spins may take up to a full turn or more.
Regardless of how many turns the spin is held or how it is entered, the following recovery technique
should be used:
1.
VERIFY THAT AILERONS ARE NEUTRAL AND THROTTLE IS IN IDLE POSITION.
2.
APPLY AND
HOLD
FULL RUDDER OPPOSITE TO THE DIRECTION OF ROTATION.
3.
JUST
AFTER
THE RUDDER REACHES THE STOP, MOVE THE CONTROL WHEEL
BRISKLY
FORWARD
FAR ENOUGH TO BREAK THE STALL. Full down elevator may be required at aft enter of gravity
loadings to assure optimum recoveries.
4.
HOLD
THESE CONTROL INPUTS UNTIL ROTATION STOPS. Premature relaxation of the control
inputs may extend the recovery.
Содержание 152 1978
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