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The drive for Aircraft Energy EfficiencyNASA's Aircraft Energy Efficiency (ACEE) program, which began in 1976, has mounted a development effort in four major transport aircraft technology fields: laminar flow systems, advanced aerodynamics, flight controls, and composite structures. ACEE has explored two basic methods for achieving drag-reducing boundary layer laminarization: the use of suction through the wing structure (via slots or perforations) to remove boundary layer turbulence, and the encouragement of natural laminar flow maintenance through refined design practices. Wind tunnel tests have been conducted for wide bodied aircraft equipped with high aspect ratio supercritical wings and winglets. Maneuver load control and pitch-active stability augmentation control systems reduce fuel consumption by reducing the drag associated with high aircraft stability margins. Composite structures yield lighter airframes that in turn call for smaller wing and empennage areas, reducing induced drag for a given payload. In combination, all four areas of development are expected to yield a fuel consumption reduction of 40 percent.
Document ID
19840046782
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
James, R. L., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Maddalon, D. V.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1984
Publication Information
Publication: Aerospace America
Volume: 22
ISSN: 0740-722X
Subject Category
Aircraft Design, Testing And Performance
Accession Number
84A29569
Distribution Limits
Public
Copyright
Other

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