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downwash

American  
[doun-wosh, -wawsh] / ˈdaʊnˌwɒʃ, -ˌwɔʃ /

noun

Aeronautics.
  1. a deflection of air downward relative to an airfoil that causes the deflection.


downwash British  
/ ˈdaʊnˌwɒʃ /

noun

  1. the downward deflection of an airflow, esp one caused by an aircraft wing

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of downwash

First recorded in 1910–15; down 1 + wash

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The condition causes a helicopter to descend in the downwash of its rotor blades and makes it vulnerable to “uncommanded pitch and roll oscillations.”

From Washington Times May 14, 2020

Each time I tried to set down on the paper target, the downwash from the drone blew it away, even when we tried weighing the target down with stones.

From BBC Dec. 24, 2016

At times, Burtynsky leaned out the side of the helicopter, his body extending so far beyond the doorframe that the downwash flattened his hair against his skull.

From The New Yorker Dec. 11, 2016

It's so firmly autostabilized that on a hot day small children will gather under it to get the cool downwash from its rotors.

From Time Jan. 31, 2013

The gas spread toward the Americans even though the downwash of the chopper blades was pushing it away.

From Time Magazine Archive

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