Quantcast Power Off Stall (POS) -Cont.

 

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T-34C CONTACT
CHAPTER SIX
2.
General. This stall might occur while you are descending in an actual or simulated
emergency or in any power-off situation when airspeed is not controlled. Recovery is made with
power off so that you will become proficient in recovering from a stall without power.
Enter this stall maneuver smoothly and without rushing to avoid over-controlling. The entry
glide simulates an actual flight condition and also provides a "measure" for the student pilot to
use in establishing the proper recovery attitude. Since the recovery is effected without power,
you cannot rely on thrust to "pull" you out of the stalled condition. You must utilize the force of
gravity to enable the aircraft to regain flying speed.
3.
Procedures
a.
CONFIGURATION: Position the aircraft at an appropriate altitude; in slow cruise
and the clean configuration.
b.
CHECKLIST: Perform the Stall Checklist aloud to your instructor.
c.
CLEARING TURN: Commence clearing turn using 45 angle of bank.
d.
Roll wings level, then reduce the PCL to 200 ft-lbs. and adjust the nose attitude to
maintain altitude. Approaching 100 KIAS, set the 100-KIAS glide attitude (horizon
bisecting the windscreen). Retrim.
e.
Once established in a 100-KIAS descent, smoothly raise the nose to a position 12-15
degrees above the normal cruise attitude by visually placing the exhaust stacks on the
horizon. Maintain this attitude with the wings level and the aircraft in balanced flight.
As the airspeed diminishes it will be necessary to increase backstick pressure
gradually in order to maintain nose attitude. Maintain heading with rudder. The stall
is recognized by airframe buffet and the nose pitching down slightly.
f.
At the stall, decrease the angle of attack by releasing backstick pressure and allow the
nose to fall slightly below the 100-KIAS gliding attitude. Stop any rolling tendency
with rudder pressure applied opposite to the direction of roll and, as soon as aileron
effectiveness has been regained, smoothly level the wings with coordinated rudder
and ailerons. Hold the recovery attitude in balanced flight to permit the airspeed to
build up and as airspeed approaches 100 KIAS, raise the nose to resume the 100-
KIAS power-off attitude. The maneuver is complete when reestablished in the 100-
KIAS glide.
4.
Common Errors
a.
Lowering the nose too far, resulting in excessive loss of altitude.
b.
Not trimming for 100-KIAS glide.
c.
Not maintaining altitude during the clearing turn.
d.
Early recovery resulting in secondary stall.
FLIGHT PROCEDURES 6-25


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