What aerodynamic effect occurs when there is an engine out situation?

In an engine-out situation, the primary aerodynamic effect experienced is roll towards the dead engine. This occurs due to the asymmetrical thrust produced by the functioning engine when one engine is inoperative. The live engine generates thrust that not only propels the aircraft forward but also exerts a lateral force, causing the aircraft to roll towards the side of the inoperative engine.

This roll tendency results from the difference in thrust and the fact that the lift vectors are not aligned with the aircraft's center of gravity. If the aircraft has an engine failure on one side, the thrust line of the remaining engine creates a yaw and a resultant roll towards the dead engine. Pilots must compensate for this roll with appropriate control inputs to maintain level flight.

Understanding this effect is crucial for pilots, as the natural roll induced by an engine failure must be counteracted to maintain control of the aircraft, prevent a stall, and perform a successful engine-out procedure.