2.0 — 54 — 12 October 2012
Flight behavior
Landing
6.6.6 Ground effect
When an aircraft is flying at a height that is approximately the same distance as its wingspan,
there is often a noticeable ground effect. This is caused primarily by the ground interrupting the
wingtip vortices behind the wing. With the wings close to the ground, wingtip vortices are
unable to form effectively due to the obstruction of the ground. This results in lower induced
drag, which increases the speed and lift of the aircraft.
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