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Rotorcraft low-speed download drag definition and its reductionDownload drag for rotorcraft in hover and low-speed flight is a burden which significantly affects useful load, fuel, and payload. Reduction of the burden will enhance these aspects of rotorcraft and complement the forthcoming improvements in isolated rotor performance. Analyses and experimental data are available, though fragmentary, regarding gross drag, thrust recovery, and other characteristics which can be utilized to define interim rotorcraft design changes to reduce the burden. Eventually the experimental data and a comprehensive combination of rotor, rotor-wake, and potential-flow analyses can evolve to reduce the burden to an absolute minimum.
Document ID
19750053523
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Wilson, J. C.
(U.S. Army, Air Mobility Research and Development Laboratory; NASA, Langley Research Center Low-Speed Aerodynamics Branch, Hampton, Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: Rotorcraft parasite drag; Thirty-first Annual National Forum
Location: Washington, DC
Start Date: May 14, 1975
End Date: May 15, 1975
Accession Number
75A37595
Distribution Limits
Public
Copyright
Other

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