AA.V.A.K1FAA-S-ACS-11A · Nov 2023Knowledge
Aerodynamics associated with stalls in a partial flap configuration, including the rela...
Aerodynamics associated with stalls in a partial flap 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 is the result of exceeding the wing's critical angle of attack, not of insufficient airspeed. It is possible to stall the wing at any airspeed, at any flight attitude, and at any power setting. Reducing angle of attack is the proper way to recover from a stall event.
Key numbers
| Number | What it means |
|---|---|
| 16°–20° depending on airplane design | Critical AOA |
| 2G load factor, stall speed 41% higher than 1G | 60° bank |
FAA references
- AFH ch. 5, Angle of Attack; Slow Flight (p. 5-9) — FAA-H-8083-3C
- AC 120-109, para. 3-2, 4-2 — AC No: 120-109A
- AFH ch. 1 (pp. 1-13–1-14) — FAA-H-8083-3C
- PHAK ch. 5 (p. 5-18) — FAA-H-8083-25C (2023)
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