CA.VII.A.K1FAA-S-ACS-7B · Nov 2023Knowledge

Aerodynamics associated with slow flight in various airplane configurations, including ...

ACS element text (the applicant demonstrates understanding of)

Aerodynamics associated with slow flight in various airplane configurations, including the relationship between angle of attack, airspeed, load factor, power setting, airplane weight and center of gravity, airplane attitude, and yaw 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.

Key numbers

Key numbers for Aerodynamics associated with slow flight in various airplane configurations, including ...
NumberWhat it means
16°–20° depending on airplane designCritical AOA
2G load factor, stall speed 41% higher than 1G stall speed60° bank

FAA references

  1. AFH ch. 5, Angle of Attack; Slow Flight (pp. 5-8–5-9) — FAA-H-8083-3C
  2. AFH ch. 1 (pp. 1-13–1-14) — FAA-H-8083-3C
  3. PHAK Glossary — FAA-H-8083-25C (2023)
  4. PHAK ch. 5 (p. 5-33) — FAA-H-8083-25C (2023)
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