Wake geometry effects on rotor blade-vortex interaction noise directivity
By: R.M. Martin ... [et al.].
Contributors: Martin, R. M. 1956-; United States. National Aeronautics and Space Administration. Scientific and Technical Information Division.
Series: NASA technical paper -- 3015.
Publisher: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division; For sale by the National Technical Information Service]
Published: 1990
Place of publication: [Washington, DC]; [Springfield, Va
Language: eng
Format: Microform
Subjects: Wakes (Aerodynamics); Rotors (Helicopters) -- Aerodynamics.
Notes: Distributed to depository libraries in microfiche.

Microfiche. [Washington, D.C.? : National Aeronautics and Space Administration], 1991. 1 microfiche.