: an airstream directed downward (as by an airfoil)
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By selectively activating these nozzles on one side of the aircraft or on sections of the wing, the AFC can instantly increase lift on one side by inducing roll, change the downwash at the rear to control pitch, or manipulate flow over the vertical surfaces to control yaw.—New Atlas, 25 Nov. 2025 This airflow, known as downwash, can reach speeds of over 13 meters per second and disrupt the stability of the drone below.—Aamir Khollam, Interesting Engineering, 6 Oct. 2025 The Osprey is hard to fly, especially if the aircraft enters a vortex ring state (VRS), a condition that affects helicopters and forces them to lose lift when entering their own downwash.—Brad Dress, The Hill, 30 Dec. 2024 The drone flew so close that the helicopter’s downwash pushed the drone into the ground.—Jonathan Rupprecht, Esq., Forbes, 9 Sep. 2024 Well after the curfew, protesters were still out on the streets, and video captured by CNN showed a military helicopter hovering over a group of them, kicking up strong wind and debris with its downwash.—Oren Liebermann, CNN, 28 May 2021 The Osprey, with its two powerful tilting rotors, has a reputation for creating mayhem with its downwash.—Kyle Mizokami, Popular Mechanics, 23 Apr. 2021 And then there is the downwash, or wind generated by the blades, which is a unique problem when filming a sailing race since the pilot must avoid interfering in the competition in any way.—New York Times, 11 Mar. 2021