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Rotor performance characteristics from an aeroacoustic helicopter wind-tunnel test programAn investigation of helicopter rotor noise at model scale was conducted in the Langley 4 by 7 meter tunnel. The program described was the first of a planned three-phase project whose purpose was to examine the characteristic noise mechanism involved in main rotor/tail rotor interaction noise. This first phase was conducted with a main rotor only, in order to identify the characteristic noise generated by only the main rotor. The aerodynamic operating conditions of the rotor system were defined during the test. The acoustic data were properly referenced.
Document ID
19860015194
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Hoad, D. R. (NASA Langley Research Center Hampton, VA, United States)
Elliott, J. W. (NASA Langley Research Center Hampton, VA, United States)
Orie, N. M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1986
Subject Category
Aerodynamics
Report/Patent Number
L-16078
AD-A169844
NAS 1.15:87661
AVSCOM-TM-86-B-1
NASA-TM-87661
Accession Number
86N24665
Funding Number(s)
PROJECT: RTOP 505-61-51-10
PROJECT: DA PROJ. 1L1-62209-AH-76
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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