down·​wash | \ ˈdau̇n-ˌwȯsh How to pronounce downwash (audio) , -ˌwäsh \

Definition of downwash

: an airstream directed downward (as by an airfoil)

Examples of downwash in a Sentence

Recent Examples on the Web Here’s an example of helicopter downwash working its magic on a cluster of Porta Potties. Kyle Mizokami, Popular Mechanics, "Trump Ordered Low-Flying Military Helicopters to Stop D.C. Protesters," 3 June 2020 And twin-engine UH-60 Black Hawk and UH-72 Lakota helicopters on Monday swept just above the tree-line over the capital’s streets, blasting an awestruck crowd of protestors below with a downwash of air, debris and fuel exhaust. John Walcott, Time, "Pulled Into Yet Another Political Battle, the Pentagon Finally Pushes Back Against Trump," 3 June 2020 When wind, which flows faster at higher altitudes, hits a structure, some of it turns downward, running along the face of the building until that downwash hits the ground and turns again, reaching serious speeds. Wired, "London Is Changing Its Skyscraper Designs—to Favor Cyclists," 2 Sep. 2019 This improves low-speed stability by halving the amount of surface area affected by the main rotor downwash, without compromising aerodynamics in forward flight. Eric Adams, WIRED, "Airbus' H160 Helicopter Helps Save Pilots from Their Own Mistakes," 31 May 2018 Other equipment in the cavernous space can replicate the downwash from rescue helicopters, and generate rain, darkness, 120-mile-per-hour winds, smoke and fire. Tyler J. Kelley, New York Times, "Need Better Morale in the Workplace? Simulate a Plane Crash," 7 Jan. 2017 Between them, though, is a downwash that creates extra drag on the plane. Sarah Scoles, WIRED, "My Flight With the Wannabe Space Pilots of the Mojave," 8 Apr. 2016 The ground blocks the trailing vortices of the wing and decreases downwash. Kyle Mizokami, Popular Mechanics, "China Is Building a Sea-Skimming Anti-Ship Drone," 4 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'downwash.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of downwash

1914, in the meaning defined above

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Time Traveler

The first known use of downwash was in 1914

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Cite this Entry

“Downwash.” Dictionary, Merriam-Webster, Accessed 20 Oct. 2020.

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