In-Flight Stall Protection Simulator

Instructions

  1. Place cursor over slide control next to airspeed tape and drag up and down to increase/decrease airspeed.
    Note the changing relationship between airspeed, aircraft pitch attitude, angle of attack and lift coefficient.
  2. Decrease airspeed toward the red low speed cue beside the airspeed tape. Stop decreasing airspeed when the Stall warning sounds.
    Note the aircraft angle of attack enters the Keep Away area as the airspeed decreases below the yellow low speed cue on the airspeed tape and reaches the activation point of Stall Warning as airspeed touches the red cue. Increase airspeed to decrease angle of attack, silence the Stall Warning and exit the Keep Away area.
  3. Decrease airspeed again, this time below Stall Warning, until the Stick Pusher animation button appears on the EADI.
    Note the activation point of the Stick Pusher occurs at a higher angle of attack than Stall Warning.
    Click on the animation button to activate the Stick Pusher. Note the effect of the stick pusher is to cause the aircraft to pitch nose down - immediately decreasing angle of attack and allowing airspeed to increase.
  4. Click on the Stick Pusher guarded switch to the right of the EADI to de-activate the pusher system.
    Repeat Step 3.
    Note that this time, as airspeed decreases, increasing angle of attack is not reversed by the Stick Pusher and the aircraft enters into a fully stalled condition. Increase airspeed to return to exit the Keep Away area.
  5. Place the cursor over the "Advanced Mode" switch and click to simulate an aircraft that has modified stall warning settings for use in icing conditions. Note that a second lift coefficient / angle of attack curve appears that is representative of the effect of ice accumulation on the aircraft - reduced CLMAX and stall occurs earlier at a lower angle of attack.
  6. In the "Normal" setting of Advanced Mode, aircraft stall warning settings are unmodified and stall warning sounds as demonstrated in Step 2. Click on the "Normal / Icing" switch to activate stall warning "Icing" mode. The Keep Away area is shifted to the left corresponding to the lower angles of attack that would be achievable should the aircraft be contaminated with ice. Repeat Step 2.
    Note the yellow and red low speed cues beside the airspeed tape are now reset to higher airspeed values in order to provide the same stall warning margins relative to CLMAX and stall as in the non-icing condition.
Note
The Stick Pusher activation point may also be modified in "Icing" mode depending upon the aircraft type.
Consult your Aircraft Operating Manual for the specific details for your type.