Which factor contributes to increased lift in ground effect?

Which factor contributes to increased lift in ground effect?

• A. Increased airspeed at high altitudes
• B. Proximity to the ground
• C. Increased weight of the aircraft
• D. Activation of thrust reversers

Answer: (B)

The factor that contributes to increased lift in ground effect is the proximity to the ground. When an aircraft is flying close to the surface, the airflow around the wings is altered, leading to an increase in lift. This phenomenon occurs because the ground decreases the intensity of the wingtip vortices and creates a more efficient flow of air over the wings. As the wing approaches the ground, the air pressure builds up under the wing, resulting in greater lift without an increase in the angle of attack. This effect is particularly significant when the aircraft is just a few feet above the runway, where the lift can be noticeably increased, allowing for smoother takeoffs and landings. The benefits of ground effect are most pronounced during the final stages of landing and the initial stages of takeoff, enhancing the aircraft's performance in those critical phases.

The factor that contributes to increased lift in ground effect is the proximity to the ground. When an aircraft is flying close to the surface, the airflow around the wings is altered, leading to an increase in lift. This phenomenon occurs because the ground decreases the intensity of the wingtip vortices and creates a more efficient flow of air over the wings. As the wing approaches the ground, the air pressure builds up under the wing, resulting in greater lift without an increase in the angle of attack.

This effect is particularly significant when the aircraft is just a few feet above the runway, where the lift can be noticeably increased, allowing for smoother takeoffs and landings. The benefits of ground effect are most pronounced during the final stages of landing and the initial stages of takeoff, enhancing the aircraft's performance in those critical phases.