In discussing windshear it is not easy to find a definition which satisfies both meteorologist and pilot. At its simplest, windshear is a change in wind direction and/or speed in space, including up draughts and down draughts. Despite the emphasis on the windshear hazard in recent years, there are still some who argue that aviators have lived with windshear since the dawn of aviation, seeing it as an extreme form of wind gradient, which would itself fit this definition.
هندسة الطيران