What is the minimum slat retraction speed?

The minimum slat retraction speed is the threshold speed at which the slats on the wing can safely be retracted after takeoff or during flight operations. For the A320 series aircraft, that speed is established as 188 knots. This figure is crucial because operating below this speed while attempting to retract the slats could lead to aerodynamic issues, affecting the aircraft's performance and safety.

Slats are high-lift devices that enhance the lift characteristics of an aircraft at lower speeds, particularly during takeoff and landing. As the plane accelerates and reaches safe climb speed, it becomes essential to retract these devices to reduce drag and optimize aerodynamic efficiency. Therefore, knowing and adhering to the minimum slat retraction speed is vital for maintaining safe and effective flight operations. This speed is derived from extensive aerodynamic testing and is part of the aircraft's established operating procedures.