VMC is highest, therefore, when the critical engine propeller is windmilling at the low pitch, high rpm blade angle. VMC is determined with the critical engine propeller windmilling in the takeoff position, unless the engine is equipped with an autofeather system.
How is Vyse determined?
Best single-engine rate of climb airspeed (Vyse) is designated by a blue radial line on most airspeed indicators. It delivers the greatest gain in altitude per unit of time, with the airplane in the following configuration: Inoperative engine propeller in the minimum drag position (feathered).
What are the factors that affect VMC?
Factors That Affect Vmc Speed
- Standard Day at Sea Level.
- Most Unfavorable Weight.
- Aft CG.
- Critical Engine Windmilling.
- Flaps Takeoff Position/Landing Gear Up.
- Up to 5 Degrees Bank.
- Max Power in Operating Engine.
