Which speed provides the most altitude gain in a given period of time?

• A. Best angle-of-climb speed
• B. Best rate-of-climb speed
• C. Stalling speed
• D. Never exceed speed

Answer: (B)

Maximizing altitude gain per unit time is achieved by flying the best rate-of-climb speed. This speed gives the highest vertical speed (feet per minute) because it provides the greatest excess power (power available minus power required). At this point, the airplane climbs fastest, so you gain the most altitude in a given period.

The other speeds serve different goals. The best angle-of-climb speed yields the steepest climb angle, meaning the most altitude per horizontal distance, but not the fastest climb rate, so time isn’t optimized. Stalling speed is the minimum safe speed to maintain control; flying at or near it won’t produce a sustained climb and can lead to loss of control. Never exceed speed is the structural limit; it isn’t about climb performance and could be dangerous if exceeded.