FAA Ground School Practice Test

Which method provides the greatest gain in altitude in the shortest distance during climb after takeoff?

1. Vy (best rate)

2. Vx (best angle)

3. Va (maneuvering speed)

4. Vso (stalling speed)

The correct answer is: Vx (best angle)

The method that provides the greatest gain in altitude in the shortest distance during climb after takeoff is best achieved through Vx, or the best angle of climb speed. This speed is specifically designed to maximize altitude gain over the shortest horizontal distance. When flying at Vx, the aircraft's climb angle is steep, allowing it to reach a specific altitude in a quick, confined distance. This is particularly useful when taking off from a runway that is limited or when obstacles are present immediately after takeoff, as it allows the pilot to clear obstacles efficiently. In contrast, while Vy (best rate) helps in gaining altitude more quickly over time, it does not achieve as steep of an angle as Vx, meaning the horizontal distance needed to gain a specific altitude is greater. Va (maneuvering speed) is primarily a speed that provides optimal control and protection against stalls during turbulent conditions, rather than maximizing altitude gain. Lastly, Vso (stalling speed) is not a climb speed at all but rather the minimum speed at which the aircraft can maintain controlled flight in the landing configuration, making it irrelevant for climb strategies.