Out-of-Control Flight
Aerodynamic Principles
DEPARTURE
That phase of flight during which the aircraft transitions from controlled to uncontrolled flight
(Figure 8).
Z (Yaw)
Y (Pitch)
X (Roll)
Departure Boundary
Yaw Rate
or
Uncontrolled Flight
Sideslip Angle
Controlled Flight
Angle of Attack
Figure 8: DEPARTURE BOUNDARY
You must realize that the AOA you see just prior to departure will vary significantly depending on the
maneuver you’re performing, i.e., how much yaw rate or sideslip you’re generating. The higher the yaw
rate or sideslip, the lower the cockpit AOA at departure.
(9-98) Original
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