飛機(jī)培訓(xùn)課件英文版：EX#12A BASIC STALLS

1、PGI EXERCISE # 12A,BASIC STALLS,200612810807,Enabling Objectives,Basic theory behind a stall and the factors affecting it. Symptoms and recognition of an approaching stall and the stall itself. Correct entry and recovery procedure. How to prevent a stall. Human Factors and Safety Considerations,Defi

2、nition,A stall occurs when the smooth airflow over the airplanes wing is disrupted, and the lift degenerates rapidly. This can occur at any airspeed, in any attitude, with any power setting,Angles of Attack,Figure 2-24 FTM,Factors Affecting Stall,Flaps Weight Power Vertical component of thrust Load

3、factor/Sudden pitch up/AOB Aircraft condition contaminants Center of Gravity Altitude No effect (same IAS),Enabling Objectives,Basic theory behind a stall and the factors affecting it. Symptoms and recognition of an approaching stall and the stall itself. Correct entry and recovery procedure. How to

4、 prevent a stall. Human Factors and Safety Considerations,Signs of Approaching Stall,Normally a reduced airspeed Normally a nose high attitude Sluggish controls Mostly elevator & aileron control, as speed decrease so does control. Stall horn Activate BEFORE stall to warn you Reduction in noise BUFFE

5、TING!,Recognition A/C had Stalled,Buffeting This is the beating effect of turbulent airflow on the a/c, which can be heard and/ or felt. It varies in intensity with different a/c. Nose drops Loss of altitude,Enabling Objectives,Basic theory behind a stall and the factors affecting it. Symptoms and r

6、ecognition of an approaching stall and the stall itself. Correct entry and recovery procedure. How to prevent a stall. Human Factors and Safety Considerations.,Entry to Power Off stall,HASEL Check Carb Heat As required Power Off Rudder As required to maintain directional control To pick up low wing

7、Gradually increase elevator back pressure to full (maintain altitude) *Consult POH / AFM for proper procedure,Recovery:,Reduce angle of attack by releasing elevator back pressure Apply full power promptly and smoothly Regain and correct attitude with coordinated aileron & rudder. Initially use rudde

8、r to stop a wing drop at Vs. As airspeed increase resume cruise flight with cruise settings Ideal / best loss of altitude is 100-200 ft for recovery!,Full Stall Recovery,Figure 2-27 FTM,Enabling Objectives,Basic theory behind a stall and the factors affecting it. Symptoms and recognition of an appro

9、aching stall and the stall itself. Correct entry and recovery procedure. How to prevent a stall. Human Factors and Safety Considerations.,Preventing Stall,WARNING SIGNS: Most of the time high nose attitude. Generally a low a/s. Sloppy Controls. Often Stall horn & Buffeting. EARLY RECOVERY BEFORE THE

10、 STALL: Recognize an approaching stall and recover before you enter it. SITUATIONAL AWARENESS: Should decrease the chances of getting yourself into a stall situation in the first place.,Enabling Objectives,Basic theory behind a stall and the factors affecting it. Symptoms and recognition of an appro

11、aching stall and the stall itself. Correct entry and recovery procedure. How to prevent a stall. Human Factors and Safety Considerations.,Safety Factors Consideration,HASEL (School recovery standard) UTILITY CATEGORY SECONDARY STALL LOOK-OUT Dont make abrupt movements on the control REVIEW I HAVE CONTROL Danger of a spin?,Human Factors,Prevention Situational Awareness Comfort / Sickness Nervousness is normal,Enabling Objectives,Basic theory behind a stall and the factors affec