Prediction of helicopter rotor discrete frequency noise
Subtitle: a computer program incorporating realistic blade motions and advanced acoustic formulation
By: Kenneth S. Brentner.
Contributors: United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
Series: NASA technical memorandum -- 87721.
Publisher: National Aeronautics and Space Administration, Scientific and Technical Information Branch; For sale by the National Technical Information Service]
Published: 1986
Place of publication: [Washington, DC]; [Springfield, Va
Language: eng
Format: Microform
Subjects: Helicopters -- Noise -- Computer simulation.
Other titles: Computer program incorporating realistic blade motions and advanced acoustic formulations.
Notes: Distributed to depository libraries in microfiche.

Microfiche. [Washington, D.C.? : National Aeronautics and Space Administration], 1986. 1 microfiche.