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Airfoil Design and Rotorcraft PerformanceThe relationship between global performance of a typical helicopter and the airfoil environment, as represented by the airfoil angles of attack and Mach number, has been examined using the comprehensive analysis CAMRAD II. A general correspondence is observed between global performance parameters, such as rotor L/D, and airfoil performance parameters, such as airfoil L/D, the drag bucket boundaries, and the divergence Mach number. Effects of design parameters such as blade twist and rotor speed variation have been examined and, in most cases, improvements observed in global performance are also observed in terms of airfoil performance. The relations observed between global Performance and the airfoil environment suggests that the emphasis in airfoil design should be for good L/D, while the maximum lift coefficient performance is less important.
Document ID
20030064157
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Bousman, William G.
(Army Aviation and Missile Command Moffett Field, CA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: American Helicopter Society 58th Annual Forum
Location: Montreal
Country: Canada
Start Date: June 11, 2002
End Date: June 13, 2002
Sponsors: American Helicopter Society, Inc.
Distribution Limits
Public
Copyright
Other

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