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Certified Flight Instructor Resources by Derek W Beck



POWER-OFF STALLS

POWER-OFF STALLS

Description

A rapid degeneration of lift as a result of excessive angle of attack, entered from the landing configuration.

Objective

To teach recognition and recovery from a full stall under landing conditions and required recovery action.

Setup

         Clear the area

         Choose forced landing area

         Configure aircraft: gear down, full flaps, carburetor heat on, power set for final approach to land (C172RG: 18 Hg, 2700 RPM), altitude so recovery is ≥1500 AGL

         Select outside references

         Start a descent (as if on final approach) using power and pitch (C172RG: 65 KIAS)

         Power to idle

         Smoothly raise nose until a stall is induced, maintaining constant pitch with the elevator

         Maintain coordination (ball centered) and neutral ailerons

Recovery

         Reduce the angle of attack by releasing back-elevator pressure

         Advancing the throttle to maximum power

         Carburetor heat off, retract first notch of flaps immediately

         Anticipate left-turning tendencies with right rudder pressure

         Continue to lower nose to regain flying speed, slowly returning to level flight

         Upon positive rate of climb, retract flaps and gear are as necessary

         When in level flight, reduce power to a setting for cruise flight or climb as necessary

         Maintain ball centered

         Look for traffic

 

Practice both straight-and-level and turning stalls (up to 30). Note buffeting and stall horn as indicators.

Common Errors

         Failure to adequately clear the area

         Inability to recognize an approaching stall condition through feel for the airplane

         Premature recovery

         Over-reliance on the airspeed indicator while excluding other cues

         Inadequate scanning resulting in an unintentional wing-low condition during entry

         Excessive back-elevator pressure resulting in an exaggerated nose-up attitude during entry

         Inadequate rudder control

         Inadvertent secondary stall during recovery

         Failure to maintain a constant bank angle during turning stalls

         Excessive forward-elevator pressure during recovery resulting in negative load on the wings

         Excessive airspeed buildup during recovery

         Failure to take timely action to prevent a full stall during the conduct of imminent stalls

References

FAA-H-8083-3A Airplane Flying Handbook p. 4-7


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