A concept for a counterrotating fan with reduced tone noise
By: James H. Dittmar.
Contributors: United States. National Aeronautics and Space Administration.
Series: NASA technical memorandum -- 105736.; NASA technical memorandum -- 105736.
Publisher: National Aeronautics and Space Administration; For sale by the National Technical Information Service
Published: 1992
Place of publication: [Washington, DC; Springfield, Va
Language: eng
Format: Microform
Subjects: Airplanes -- Turbofan angines.; Noise control.
Notes: Distributed to depository libraries in microfiche.

Shipping list no.: 93-0304-M.

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1992. 1 microfiche.