AA.V.C.K1FAA-S-ACS-11A · Nov 2023Knowledge
Aerodynamics associated with stalls in the landing configuration, including the relatio...
Aerodynamics associated with stalls in the landing configuration, including the relationship between angle of attack, airspeed, load factor, power setting, aircraft weight and balance, aircraft attitude, and sideslip effects.
Bottom line
A stall results from exceeding the critical angle of attack, not from insufficient airspeed. It is possible to stall the wing at any airspeed, at any flight attitude, and at any power setting. Landing configuration means landing gear extended and the flaps set at an approved setting for a normal landing.
Key numbers
| Number | What it means |
|---|---|
| 16°–20° depending on airplane design | Critical AOA |
| 2G load factor, stall speed 41% higher than 1G stall speed | 60° bank |
FAA references
- AFH ch. 5, Angle of Attack; Slow Flight (p. 5-9) — FAA-H-8083-3C
- AC 120-109, para. 1-7 — AC No: 120-109A
- AFH ch. 1 (pp. 1-13–1-14) — FAA-H-8083-3C
- AC 120-109, para. 4-2 — AC No: 120-109A
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