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downwash
Definição1
Air that has been accelerated downward by action of the rotor.
Fonte1
SCHAFER, Joe. Helicopter maintenance. Englewood: Jeppesen Sanderson, Inc., c2007. viii, 343 p.
Definição2
1. Angle through which fluid stream is deflected down by aerofoil or other lifting body, measured in plane parallel to plane of symmetry close behind trailing edge; directly proportional to lift coefficient; 2. Angle through which fluid stream is deflected by rotor of rotary-wing aircraft, measured parallel to rotor disc; 3. Some authorities consider it not as an angular measure but as a rate of change of momentum, equal but opposite to lift; 4. Not least, often taken to mean linear velocity of flow through helicopter main rotor in hovering flight.
Fonte2
GUNSTON, Bill. The Cambridge aerospace dictionary. Cambridge: Cambridge University, 2004. vii, 740 p. (Cambridge aerospace series.)
Definição3
A flow deflected downwards by an aerodynamic lifting surface, e.g., a wing.
Fonte3
MULTILINGUAL aeronautical dictionary, or, dictionary aeronautique multilingue: english, french, spanish, dutch, greek, italian,portuguese, turkish. London: Technical Editing and reproduction Ltd, 1980.
Fonte4
INTERNATIONAL MARITIME ORGANIZATION; INTERNATIONAL CIVIL AVIATION ORGANIZATION. IAMSAR manual: international aeronautical and maritime search and rescue manual. Volume III: mission co-ordination. 3rd ed. Montréal, 2013. (Doc. 9731)
Contexto
Loose objects should be cleared away or secured due to downwash from the helicopter.
Subárea
Aerodynamics
Français
déflexion vers le bas