down·wash (doun w sh , -wôsh)n. Downward air turbulence caused by the motion or action of a propeller or jet: the downwash of the helicopter blades. |
downwash [ˈdaʊnˌwɒʃ]
n
(Engineering / Aeronautics) the downward deflection of an airflow, esp one caused by an aircraft wing
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