AI.X.I.K2FAA-S-ACS-25 · Nov 2023Knowledge

Aerodynamics associated with spins in various airplane configurations, including the re...

ACS element text (the applicant demonstrates understanding of)

Aerodynamics associated with spins 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

Increased load factor directly affects stall speed (as well as do other factors such as gross weight, center of gravity, and flap setting).

Key numbers

Key numbers for Aerodynamics associated with spins in various airplane configurations, including the re...
NumberWhat it means
16°–20° depending on airplane designCritical AOA
2.0 in a level altitude 60° banked turnLoad factor
1.41 in a level altitude 45° banked turnLoad factor
41 percent higher than 1G stall speed in a coordinated, level 60° banked turn at 2GStall speed
up to 3.8 for a standard category general aviation airplaneDesign limit

FAA references

  1. AFH ch. 1 (pp. 1-13–1-14) — FAA-H-8083-3C
  2. AFH ch. 5, Angle of Attack; Coordinated Flight (pp. 5-8–5-9) — FAA-H-8083-3C
  3. AFH ch. 10 (p. 10-2) — FAA-H-8083-3C
  4. RMH Glossary — FAA-H-8083-2A
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