飞机培训课件英文版：EX#12B ADVANCED STALLS

1、PGI EXERCISE # 12B,ADVANCED STALLS,200612810807,Enabling Objectives,The correct entry and recovery for climbing and descending stalls. The correct entry and recovery for arrival/departure stalls. The correct entry and recovery for overshoot stalls. Situations that could lead to an acceleration stall

2、, and the correct recovery procedure. Safety & Human Factors,Climbing Stall,What is the Vs? What does it stand for? A stall that is straight & level and clean. Will the stall speed here be higher or lower than Vs and WHY? Lower due to the increased power.,Entry,HASEL 2000 rpm Apply back pressure to

3、climb attitude Control yaw with rudder Hold until stall occurs,Recovery,Executed in quick succession: Reduce Angle of Attack to unstall wing Control yaw with rudder,Recovery,If Stall broken, and directional control is maintained before the nose attitude reaches the horizon: Apply full power Remove c

4、arb heat As airspeed increases, initiate a shallow climb,Recovery,If Stall broken, but wing drop occurs: Reduce power to idle Opposite rudder to pick up wing drop Smoothly recover from the nose down attitude, to normal cruise. Apply full power and initiate a climb attitude,Descending Stall,Where wou

5、ld we encounter a descending stall? Turning base to final On approach to land,Entry,HASEL check Reduce power to idle Apply back pressure to reduce a/s Hold until stall occurs,Recovery,Reduce angle of attack to un-stall the wings Apply full power Smoothly recover from the nose down attitude to normal

6、 cruise Initiate a climb attitude Remove carb heat (if applicable) *Note: On recovery, no abrupt pull-ups or reductions in power-Secondary Stalls,Enabling Objectives,The correct entry and recovery for climbing and descending stalls. The correct entry and recovery for arrival / departure stalls. The

7、correct entry and recovery for overshoot stalls. Situations that could lead to an acceleration stall, and the correct recovery procedure. Safety & Human Factors.,Arrival / Departure Stall,How could we get into a departure stall? Unexpected obstacle Lack of attention These stalls which occur, while t

8、aking-off are practiced at altitude. WHY? Possibly not enough alt to recover close to the ground.,How Come?,How come?,Entry,HASEL (recover by school standards) Simulate full power with max 2000 rpm Gently raise nose to decrease a/s Establish bank attitude (Max of 15) Within white arc, extend flaps C

9、ontrol yaw Smoothly raise nose attitude until stall,Departure Stall,Figure 2-29 FTM,Recovery,Executed in quick succession: Reduce Angle of attack Maintain directional control Apply full power Then continue : Remove carb heat (if applicable) Initiate a shallow climb After positive indications, retrac

10、t flaps Resume the best rate or angle of climb attitude Trim,Recovery,If Stall broken, but wing drop occurs: Reduce power to idle Opposite rudder to pick up wing drop Smoothly recover from the nose down attitude, to normal cruise. Apply full power and initiate a climb attitude,Entry,HASEL (recover b

11、y school standards) Power to idle Establish descent and bank attitude (Max 30AOB) Gradually raise nose attitude until stall Control yaw,Recovery,Reduce A/A to unstall wings Maintain directional control to prevent or correct a wing drop with rudder Ease out of dive smoothly Apply full power As airspe

12、ed increase, establish shallow climb,Enabling Objectives,The correct entry and recovery for climbing and descending stalls. The correct entry and recovery for arrival / departure stalls. The correct entry and recovery for overshoot stalls. Situations that could lead to an acceleration stall, and the

13、 correct recovery procedure. Safety & Human Factors.,Overshoot Stall,Occurs anytime during overshoot Close proximity with ground False sensory perception Raising nose too high,Entry,HASEL (recover by school standard) Reduce power Carb Heat On (as required) Flaps full when in white arc Commence Overs

14、hoot Simulate full power (Max 2000rpm) Carb Heat Cold (as required) Flaps as required Smoothly pulling back on control column to stall a/c.,Recovery,Reduce angle of attack Confirm full power Maintain directional control Once stall is broken, Establish shallow climb attitude Retract remaining flaps b

15、efore Vfe. As a/s increases, resume the normal climb attitude.,Enabling Objectives,The correct entry and recovery for climbing and descending stalls. The correct entry and recovery for arrival / departure stalls. The correct entry and recovery for overshoot stalls. Situations that could lead to an a

16、cceleration stall, and the correct recovery procedure. Safety & Human Factors.,Situation for Accelerated Stall,Any turn Secondary stall during dive recovery Turbulence Secondary stall during stall recovery Steep climbing turn while overshooting in confined area Collision avoidance turn,Recovery,Redu

17、ce Angle of attack Apply full power Carb Heat - Off (if applicable) Control yaw with rudder As a/s increases, resume cruise attitude Return to cruise settings,Enabling Objectives,The correct entry and recovery for climbing and descending stalls. The correct entry and recovery for arrival / departure

18、 stalls. The correct entry and recovery for overshoot stalls. Situations that could lead to an acceleration stall, and the correct recovery procedure. Human Factors & Safety Consideration,Safety Factors Consideration,HASEL check Watch out for secondary stall Acceleration stall below Va Prompt smooth recoveries,Human Factors,Situational Awareness PREVENTION IS THE KEY. Any signs of a approaching stall, initiate the recovery immediately! PDM T/O over weight? / Aft CG,Enabling Objectives,Th