PA.X.A.K1FAA-S-ACS-6C · Nov 2023Knowledge
Factors affecting minimum controllable speed (VMC).
Factors affecting minimum controllable speed (VMC).
Bottom line
The Vmc noted in practice or demonstration, or in actual OEI operation, could be less or even greater than the published value.
Key numbers
| Number | What it means |
|---|---|
| more than 3 knots per degree of bank less than 5 degrees | VMC rise |
| loss of directional control possible almost 20 knots above published VMC | Level wings |
| stop the turn within 20 degrees of original heading | Heading change |
| no more than 5 degrees angle of bank | Bank limit |
| VMC plus 5 knots | No published Vr |
FAA references
- AFH ch. 13 (p. 13-2) — FAA-H-8083-3C
- FAA-P-8740-66, Flying Light Twins Safely — FAA-P-8740-66
- PHAK Glossary (p. G-33) — FAA-H-8083-25C (2023)
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