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Aerodynamics
aerodynamics can be tested by a wind tunnel
the aerodynamics is the stupid answer that no one knows
internal aerodynamics and external aerodynamics. internal is related to flow of ducts and external to going away from the bodies.
Alfred Gessow has written:
'Aerodynamics of the helicopter' -- subject(s): Aerodynamics, Helicopters
'A survey of computational aerodynamics in the United States' -- subject(s): Aerodynamics, Data processing