Reduction of high-speed impulsive noise by blade planform modification of a model helicopter rotor
By: David A. Conner and Danny R. Hoad
Contributors: Hoad, Danny R; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch; Army Research and Technology Laboratories (U.S.). Structures Laboratory; Langley Research Center
Series: NASA technical memorandum -- 84553; AVRADCOM technical report -- 82-B-6
Publisher: National Aeronautics and Space Administration, Scientific and Technical Information Branch; For sale by the National Technical Information Service]
Published: 1982
Place of publication: Washington, D.C; [Springfield, Va
Language: eng
Number of pages: 58
Subjects: Acoustical engineering; Rotors (Helicopters); Helicopters -- Testing
Notes: "Structures Laboratory, AVRADCOM Research and Technology Laboratories."

"Langley Research Center."

Distributed to depository libraries in microfiche

"December 1982"--Cover

Subject category 71

Includes bibliographical references