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Improved Hub Fairings For HelicoptersWind-tunnel experiments show new generic configuration for fairing for helicopter rotor hub reduces contribution of hub to overall aerodynamic drag. New generic fairing has flat bottom, which eliminates converging/diverging boundary by straightening surfaces facing each other. Reduces interference drag, similarly to reduction of interference drag by flattening of facing surfaces of two side-by-side airfoils.
Document ID
19900000236
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Stroub, Robert H. (NASA Ames Research Center, Moffett Field, CA.)
Young, Larry A. (NASA Ames Research Center, Moffett Field, CA.)
Graham, David R. (NASA Ames Research Center, Moffett Field, CA.)
Louie, Alexander W. (NASA Ames Research Center, Moffett Field, CA.)
Date Acquired
August 14, 2013
Publication Date
May 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 5
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
ARC-12288
Report Number: ARC-12288
ISSN: 0145-319X
Accession Number
90B10236
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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