Private Pilot License (PPL) Aerodynamics Practice Exam

What is a significant hazard when taking off or landing near heavy aircraft?

1. Reduced visibility of other aircraft

2. Sink into the flightpath of aircraft below

3. Increased climb gradient requirements

4. Noise pollution affecting performance

The correct answer is: Sink into the flightpath of aircraft below

The significant hazard when taking off or landing near heavy aircraft is the risk of sinking into the flight path of aircraft below. This concern stems from the wake turbulence generated by larger aircraft when they are in flight, particularly during takeoff and landing phases. Heavy aircraft create strong vortices, which are swirling air patterns that can linger in the air even after the aircraft has departed. As a smaller aircraft takes off or lands, it might inadvertently enter these vortices, leading to an unexpected loss of control, severe turbulence, or even a stall if the conditions are right. Smaller aircraft are especially vulnerable during these critical phases of flight because they have less inertia and power to counteract the effects of the turbulence compared to larger aircraft. Being aware of this phenomenon is crucial for pilot safety, thus highlighting the importance of maintaining appropriate spacing and altitude when operating in proximity to heavy aircraft at airports or active flight routes.