AI.II.P.K5bFAA-S-ACS-25 · Nov 2023Knowledge
b. Effects of bank angle on VMC
Aerodynamics of OEI operation including: b. Effects of bank angle on VMC
Bottom line
With other factors constant, VMC is highly sensitive to bank angle. VMC is reduced significantly with increases in bank angle. VMC increases significantly as the wings approach level.
Key numbers
| Number | What it means |
|---|---|
| may increase more than 3 knots for each degree of bank less than 5 degrees | VMC vs bank |
| loss of directional control possible at speeds almost 20 knots above published VMC | Wings level |
| approximately two to three degrees of bank toward the operating engine at Vyse for most light twins | Zero sideslip bank |
FAA references
- FAA-P-8740-66, Flying Light Twins Safely — FAA-P-8740-66
- PHAK Glossary (p. G-33) — FAA-H-8083-25C (2023)
- AFH ch. 13 (p. 13-23) — FAA-H-8083-3C
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