What is the sink rate in feet per minute at best glide speed?

• A. 1200 feet/min
• B. 1300 feet/min
• C. 1350 feet/min
• D. 1400 feet/min

Answer: (C)

The sink rate at best glide speed is a critical factor for pilots to understand, as it determines how quickly an aircraft will descend during a glide. At best glide speed, the aircraft is optimally configured to maximize distance over ground for a given altitude loss, providing the most efficient glide.

In this context, a sink rate of 1350 feet per minute corresponds with the optimal performance capabilities of the aircraft during a glide. This means that at this speed, the aircraft maintains a balance between lift and drag, resulting in the best possible glide performance. Knowing this rate is essential for pilots in emergency situations when they need to manage altitude while trying to reach a landing area.

Understanding the correct sink rate allows pilots to plan their maneuvers effectively, ensuring they can cover the maximum distance before landing, which is vital in scenarios where engine power is not available.