Research investigation of helicopter main rotor/tail rotor interaction noise
By: J. Fitzgerald and F. Kohlhepp.
Contributors: Kohlhepp, F. W.; United States. National Aeronautics and Space Administration. Scientific and Technical Information Division.
Series: NASA contractor report -- 4143.; NASA contractor report -- NASA CR-4143.
Publisher: National Aeronautics and Space Administration, Scientific and Technical Information Division; For sale by the National Technical Information Service]
Published: 1988
Place of publication: [Washington, DC]; [Springfield, Va
Language: eng
Format: Microform
Subjects: Rotors (Helicopters) -- Noise.
Notes: Distributed to depository libraries in microfiche.

Microfiche. [Washington, D.C.? : National Aeronautics and Space Administration], 1988. 2 microfiches.