How far must vehicles stay from the rear of heavy type aircraft when engines are running?

The correct answer indicates that vehicles must maintain a distance of 300 feet from the rear of heavy type aircraft when their engines are running. This distance is established for safety reasons due to the potential hazards posed by jet blast and prop wash.

Heavy aircraft, such as commercial airliners or military cargo planes, generate significant thrust from their engines. When these engines are running, especially during takeoff and landing, the resulting blast can be extremely powerful. Jet blast can create dangerous conditions for nearby objects and personnel, leading to potential injuries or damage. Maintaining a buffer of 300 feet helps to ensure that vehicles and individuals remain at a safe distance from these potential hazards.

While closer distances may seem adequate, they do not provide the necessary margin for safety, particularly in a busy airfield environment where unexpected movements can pose additional risks. Recognizing and adhering to this distance is crucial for maintaining operational safety around heavy aircraft.