What does washout refer to in wing design?

In wing design, washout refers specifically to a decrease in the angle of incidence from the wing root to the tip. This design technique is often used to improve the aerodynamic characteristics of the wing. By reducing the angle of incidence towards the tip, wings can stall more gently and allow for better control, enhancing safety and performance during flight.

The purpose of washout is to ensure that the root section of the wing, which typically experiences higher loads and therefore reaches stall conditions sooner, maintains lift longer than the tip. This arrangement helps prevent adverse yaw and improves the overall handling of the aircraft, especially during takeoff and landing phases.

Undoubtedly, understanding washout is crucial for aeronautical engineers and designers, as it directly influences the aircraft's stability and efficiency. By implementing washout, designers can manage airflow more effectively along the wing, contributing to more predictable flight characteristics and optimal performance.