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Aerodynamic and structural studies of joined-wing aircraftA method for rapidly evaluating the structural and aerodynamic characteristics of joined-wing aircraft was developed and used to study the fundamental advantages attributed to this concept. The technique involves a rapid turnaround aerodynamic analysis method for computing minimum trimmed drag combined with a simple structural optimization. A variety of joined-wing designs are compared on the basis of trimmed drag, structural weight, and, finally, trimmed drag with fixed structural weight. The range of joined-wing design parameters resulting in best cruise performance is identified. Structural weight savings and net drag reductions are predicted for certain joined-wing configurations compared with conventional cantilever-wing configurations.
Document ID
19910048911
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kroo, Ilan
(Stanford University CA, United States)
Smith, Stephen
(NASA Ames Research Center Moffett Field, CA, United States)
Gallman, John
(Stanford Univ. CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Journal of Aircraft
Volume: 28
ISSN: 0021-8669
Subject Category
Aircraft Design, Testing And Performance
Accession Number
91A33534
Funding Number(s)
CONTRACT_GRANT: NCA2-84
Distribution Limits
Public
Copyright
Other

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