Factors affecting the Critical Engine
P-Factor
Accelerated Slipstream
Torque
Spiraling Slipstream
Factors affecting Vmc
Critical engine inop. (Largest yaw) Propeller Windmilling (Greatest drag) Power set to takeoff/maximum D.A. (Higher) Most unfavorable C.G. Location (aft) Most unfavorable Weight (light) Flaps set for takeoff (no flaps) Landing gear (up) Bank angle (Ground effect) (worse in ground effect)
Vmc
The airspeed in which directional control can be matined with no more then 5 degrees of bank, when the critical engine is suddenly made inoperative.