WARNING AREA - Airspace of defined dimensions, extending from 3 nautical miles outward from the coast of the United States that contains activity that may be hazardous to nonparticipating aircraft. The purpose of such warning areas is to warn nonparticipating pilots of the potential danger. A warning area may be located over domestic or international waters or both.
WASHOUT - The twist in an airfoil which causes less angle of attack at the tips than the root. For airplanes, this increases stability of the aircraft at slow speeds as the wing tips will stall after the center of the wing, avoiding accidental tip stalls.
WAYPOINT - A predetermined geographical position used for route/instrument approach definition, or progress reporting purposes, that is defined relative to a VORTAC station or in terms of latitude/longitude coordinates.
WINDSOCK - This can be used to describe a number of devices, all of which give a visual clue to the direction and speed of wind in a given location.
WING - The main lifting surface of an airplane.
WINGLET - A small, stabilizing, rudder like addition to the tips of a wing to control or employ air movement.
WING LOADING - The maximum take-off gross weight of an aircraft divided by its wing area.
WING ROOT - The centerline of the wing, where the left and right wing panels are joined.
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