![]() AC-61-23A, Pilot's Handbook of Aeronautical Knowledge. Refer to the page on angle of attack for comparison.ġ. Once the aircraft becomes airborne, only the motion of the aircraft produces relative wind, and the relative wind becomes opposite and parallel to the flight path of the aircraft.Īlthough the wind can affect the ground speed and aircraft drift, the relative wind will always remain opposite and parallel to the aircraft wing. As the airplane accelerates down the runway, the wind and motion of the aircraft are combined to create relative wind. This is why takeoffs are normally into the wind.ĭuring takeoff, when the aircraft is stationary, the relative wind would be the motion and direction of the airflow around the aircraft created by the wind. 1Īlso relative wind can created by a stationary object and the motion of the air around it, as when an aircraft is pointed down a runway for takeoff. Therefore, the relative wind is parallel to the flight path, and travels in the opposite direction. If the flight path is forward and downward, then the relative wind is backward and upward.If the flight path is forward and upward, then the relative wind is backward and downward.If the flight path is forward then the relative wind is backward.In normal flight circumstances, the relative wind is the opposite direction of the aircraft flight path. The relative wind is a relationship between the direction of airflow and the aircraft wing.
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