Which climb speed provides the greater gain in altitude in the shortest distance after takeoff?

Vx, or the best angle of climb speed, is the speed that provides the greatest gain in altitude over the shortest horizontal distance after takeoff. This speed is particularly important when obstacles are present in the flight path, as it maximizes the altitude gained in that limited distance.

When flying at Vx, the aircraft climbs at a steeper angle, which means that it reaches a higher altitude more quickly relative to the ground distance traveled. This performance is crucial during takeoff from airports with obstacles like trees or buildings nearby.

In contrast, Vy, the best rate of climb speed, is typically used for gaining altitude in the shortest amount of time, rather than distance. While Vx is advantageous for clearing obstacles, Vy is more efficient for climbing toward cruising altitude once clear of obstacles. Va, or maneuvering speed, is not primarily associated with efficient climb performance; it is related to the structural integrity of the aircraft during turbulent conditions. Vref is the reference landing speed and does not apply to climb performance at all.