What does Vy stand for in aircraft performance?

Vy stands for "best rate of climb" in aircraft performance. It is the speed at which an aircraft can gain the most altitude in a given amount of time. This speed is crucial for pilots to know, especially during takeoff and initial climb, as it allows them to maximize their climb performance to avoid obstacles and gain altitude effectively. By flying at Vy, the aircraft achieves a balance between lift and drag, ensuring the best vertical speed possible.

Knowing this speed helps pilots optimize their climb in various conditions, contributing to both safety and efficiency during flight operations.