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A Historical Overview of Aeroelasticity Branch and Transonic Dynamics Tunnel Contributions to Rotorcraft Technology and DevelopmentA historical account of the contributions of the Aeroelasticity Branch (AB) and the Langley Transonic Dynamics Tunnel (TDT) to rotorcraft technology and development since the tunnel's inception in 1960 is presented. The paper begins with a summary of the major characteristics of the TDT and a description of the unique capability offered by the TDT for testing aeroelastic models by virtue of its heavy gas test medium. This is followed by some remarks on the role played by scale models in the design and development of rotorcraft vehicles and a review of the basic scaling relationships important for designing and building dynamic aeroelastic models of rotorcraft vehicles for testing in the TDT. Chronological accounts of helicopter and tiltrotor research conducted in AB/TDT are then described in separate sections. Both experimental and analytical studies are reported and include a description of the various physical and mathematical models employed, the specific objectives of the investigations, and illustrative experimental and analytical results.
Document ID
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Yeager, William T., Jr.
(Army Research Lab. Hampton, VA United States)
Kvaternik, Raymond G.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
August 1, 2001
Subject Category
Research And Support Facilities (Air)
Report/Patent Number
NAS 1.15:211054
Funding Number(s)
PROJECT: RTOP 712-20-21-01
Distribution Limits
Work of the US Gov. Public Use Permitted.
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