![]() ![]() Both lift (and airspeed for any given engine power setting) are increased. This causes the effective aspect ratio of the wing to become greater than the geometric aspect ratio and reduces induced drag. Instead of being circular, vortices in proximity to the ground become elliptical as the airflow is pushed outwards. ![]() When generated in proximity to the ground, the form of the wing tip vortex, which is always generated when an aerofoil moves through the air, because pressure beneath a wing is always higher than that above it, is modified. The reduction in induced drag - so called because it is a function of the lift generated by the wing - occurs at the wing tip. In most circumstances, this increased lift is supplemented by a direct increase in the lift generated by the wing. The increase in Liftlift created by Ground Effect comes primarily from a reduction in the amount of induced drag generated which improves the lift/drag ratio. It applies to both fixed and rotary wing aircraft. ![]() This effect is a consequence of the distortion of the airflow below such surfaces attributable to the proximity of the ground. Ground Effect is the name given to the positive influence on the lifting characteristics of the horizontal surfaces of an aircraft wing when it is close to the ground.
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