Vx (Best Angle-of-Climb Speed)

The airspeed that produces the greatest gain in altitude over the shortest horizontal distance. Vx is used when the pilot needs to clear an obstacle after takeoff, such as trees or buildings near the departure end of the runway. It is always lower than Vy and results in a steeper but slower climb. In a Cessna 172S, Vx is approximately 62 KIAS.