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PA.IX.F.K1FAA-S-ACS-6C · Nov 2023Knowledge

Factors affecting minimum controllable speed (VMC).

ACS element text (the applicant demonstrates understanding of)

Factors affecting minimum controllable speed (VMC).

Bottom line

VMC is the calibrated airspeed at which, following the sudden critical loss of thrust, it is possible to maintain control of the airplane. VMC varies with each of the certification factors, including power, CG, weight, and configuration.

Key numbers

Key numbers for Factors affecting minimum controllable speed (VMC).
NumberWhat it means
within 20 degrees of original headingHeading change
no more than 5 degreesBank in straight flight

FAA references

  1. AFH ch. 13 (p. 13-2) — FAA-H-8083-3C
  2. FAA-P-8740-66, Flying Light Twins Safely — FAA-P-8740-66
  3. PHAK Glossary (p. G-33) — FAA-H-8083-25C (2023)
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