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Effects on inlet technology on cruise speed selectionThe impact of cruise speed on technology level for certain aircraft components is examined. External-compression inlets were compared with mixed compression, self starting inlets at cruise Mach numbers of 2.0 and 2.3. Inlet engine combinations that provided the greatest aircraft range were identified. Results show that increased transonic to cruise corrected air flow ratio gives decreased range for missions dominated by supersonic cruise. It is also found important that inlets be designed to minimize spillage drag at subsonic cruise, because of the need for efficient performance for overland operations. The external compression inlet emerged as the probable first choice at Mach 2.0, while the self starting inlet was the probable first choice at Mach 2.3. Airframe propulsion system interference effects were significant, and further study is needed to assess the existing design methods and to develop improvements.
Document ID
19810009475
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bangert, L. H.
(Lockheed-California Co. Burbank, CA, United States)
Santman, D. M.
(Lockheed-California Co. Burbank, CA, United States)
Horie, G.
(Lockheed-California Co. Burbank, CA, United States)
Miller, L. D.
(Lockheed-California Co. Burbank, CA, United States)
Date Acquired
August 11, 2013
Publication Date
March 1, 1980
Publication Information
Publication: NASA. Langley Research Center Supersonic Cruise Res., 1979, pt. 1
Subject Category
Aircraft Design, Testing And Performance
Accession Number
81N17998
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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