PA.IX.E.K2FAA-S-ACS-6C · Nov 2023Knowledge
VMC (red line) and best single-engine rate of climb airspeed (VYSE) (blue line).
VMC (red line) and best single-engine rate of climb airspeed (VYSE) (blue line).
Bottom line
VMC is typically marked with a red radial line on most airspeed indicators. VYSE is the best rate of climb speed with one engine inoperative, marked with a blue radial line on most airspeed indicators. There is no requirement that the airplane be capable of climbing at VMC; VMC only addresses directional control.
Key numbers
| Number | What it means |
|---|---|
| more than 3 knots increase per degree of bank less than 5 degrees | VMC bank effect |
| loss of directional control possible almost 20 knots above published VMC | Level wings |
| within 20 degrees of the original heading | Certification turn |
| approximately two to three degrees of bank toward the operating engine | Zero sideslip bank |
FAA references
- AFH ch. 13 (pp. 13-1–13-2) — FAA-H-8083-3C
- FAA-P-8740-66, Flying Light Twins Safely — FAA-P-8740-66
- PHAK ch. 9 (p. 9-3) — FAA-H-8083-25C (2023)
- PHAK ch. 8 (p. 8-10) — FAA-H-8083-25C (2023)
- AFH ch. 13 (p. 13-37) — FAA-H-8083-3C
Build understanding you can use
Unlock the full lesson and continue studying this element.
- Full teaching sections: What it is; Key points; Rules and numbers; How it is done
- Check your understanding with answers you can reveal
- Common mistakes paired with the FAA facts that correct them