AA.V.B.K1FAA-S-ACS-11A · Nov 2023Knowledge
Aerodynamics associated with stalls in a clean configuration, including the relationshi...
Aerodynamics associated with stalls in a clean configuration, including the relationship between angle of attack, airspeed, load factor, power setting, aircraft weight and balance, and aircraft attitude.
Bottom line
The direct cause of every stall is an excessive angle of attack (AOA). Low speed is not necessary to produce a stall; the wing can be brought to an excessive AOA at any speed. Reducing AOA is the proper way to recover from a stall event, and reducing the airplane's AOA will normally result in altitude loss.
Key numbers
| Number | What it means |
|---|---|
| 16°–20° depending on airplane design | Critical AOA |
FAA references
- AFH ch. 1 (pp. 1-13–1-14) — FAA-H-8083-3C
- AC 120-109, para. 4-2 — AC No: 120-109A
- AC 120-109 Appendix 3 — AC No: 120-109A
- AFH ch. 16 (p. 16-6) — FAA-H-8083-3C
- PHAK ch. 5 (p. 5-33) — FAA-H-8083-25C (2023)
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