Which speed is associated with maximum flap extension for the down position (Vfe)?

The speed associated with maximum flap extension, commonly referred to as Vfe, is critical for safe operations during and after flap deployment. In the King Air 350, Vfe is established as the maximum speed at which the flaps can be fully extended (down position), allowing pilots to know their limits for flap deployment. This is essential for maintaining control of the aircraft and ensuring safe performance characteristics during approach and landing phases of flight.

In the case of the King Air 350, 158 KIAS is the correct Vfe. Maintaining speed below this limit during flap extension helps prevent undesired aircraft behavior and ensures that the flaps deploy effectively without risking structural integrity or airflow disruptions that could affect lift and drag characteristics. Adhering to Vfe is crucial for the envelope of safe operations, impacting aircraft handling, and performance, particularly during critical phases of flight such as descent and landing. Understanding the importance of Vfe allows pilots to operate the aircraft more safely and effectively while complying with operational limitations.