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Demonstration of relaxed static stability on a commercial transportIncreasing jet aircraft fuel costs from 25 percent to nearly 60 percent of the aircraft direct operating costs have led to a heavy emphasis on the development of transport aircraft with significantly improved aerodynamic performance. The application of the concept of relaxed static stability (RSS) and the utilization of an active control stability augmentation system make it possible to design an aircraft with reduced aerodynamic trim drag due to a farther-aft cg balance. Reduced aerodynamic parasite drag and lower structural weight due to a smaller horizontal tail surface can also be obtained. The application of RSS has been studied under a NASA-sponsored program to determine ways of improving the energy efficiency in current and future transport aircraft. Attention is given to a near-term pitch active control system, an advanced pitch active control system, and an operational overview.
Document ID
19850030442
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rising, J. J.
(Lockheed-California Co. Burbank, CA, United States)
Davis, W. J.
(Lockheed-California Co. Burbank, CA, United States)
Willey, C. S.
(Lockheed-California Co. Burbank, CA, United States)
Cokeley, R. C.
(Lockheed-California Co. Burbank, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Lockheed Horizons
Issue: 16, 1
Subject Category
Aircraft Stability And Control
Accession Number
85A12593
Funding Number(s)
CONTRACT_GRANT: NAS1-15326
Distribution Limits
Public
Copyright
Other

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