What is the average sink rate of vortices?

• A. 100-300 feet per minute
• B. 300-500 feet per minute
• C. 500-700 feet per minute
• D. 700-1000 feet per minute

Answer: (B)

The average sink rate of vortices, typically associated with wake turbulence generated by aircraft, is around 300-500 feet per minute. This range reflects the behavior of these vortices as they descend and disperse after being created by larger aircraft. Understanding this sink rate is crucial for air traffic controllers and pilots, especially during takeoff and landing phases, as it helps in assessing the potential hazards posed by wake turbulence to following aircraft.

Vortices are particularly dangerous during the critical phases of flight due to their ability to linger in the air and descend at a rate that can significantly affect trailing aircraft. Recognizing the sink rate as being within this specific range allows for the implementation of proper separation standards and safety measures in air traffic management.