What is the impact of accelerated slipstream if the critical engine fails?

When a critical engine fails in a multi-engine aircraft, the phenomenon known as accelerated slipstream occurs. This happens because the remaining operational engine(s) create a higher velocity of air over the wings relative to the failed engine's side. In this situation, the wing on the side of the engine that has failed experiences a loss of lift because it is not receiving the same amount of accelerated airflow that it would normally get from the slipstream of the operational engine.

As a result, the uneven lift distribution can lead to an increase in drag and a significant reduction in the aircraft's ability to maintain controlled flight. The wing on the side of the failed engine suffers more because the airflow over that wing is now less efficient compared to its counterpart. This greater loss of lift on that wing can cause the aircraft to roll towards the inoperative engine, which requires immediate pilot response to counteract.

Understanding this concept is critical for pilots, as it highlights the importance of effective engine management and the inherent risks associated with engine failure in multi-engine aircraft.