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Aerodynamic Assessment of Flight-Determined Subsonic Lift and Drag Characteristics of Seven Lifting-Body and Wing-Body Reentry Vehicle ConfigurationsThis report examines subsonic flight-measured lift and drag characteristics of seven lifting-body and wing-body reentry vehicle configurations with truncated bases. The seven vehicles are the full-scale M2-F1, M2-F2, HL-10, X-24A, X-24B, and X-15 vehicles and the Space Shuttle Enterprise. Subsonic flight lift and drag data of the various vehicles are assembled under aerodynamic performance parameters and presented in several analytical and graphical formats. These formats are intended to unify the data and allow a greater understanding than individually studying the vehicles allows. Lift-curve slope data are studied with respect to aspect ratio and related to generic wind-tunnel model data and to theory for low-aspect-ratio platforms. The definition of reference area is critical for understanding and comparing the lift data. The drag components studied include minimum drag coefficient, lift-related drag, maximum lift-to drag ratio, and, where available, base pressure coefficients. The influence of forebody drag on afterbody and base drag at low lift is shown to be related to Hoerner's compilation for body, airfoil, nacelle, and canopy drag. This feature may result in a reduced need of surface smoothness for vehicles with a large ratio of base area to wetted area. These analyses are intended to provide a useful analytical framework with which to compare and evaluate new vehicle configurations of the same generic family.
Document ID
20030003696
Document Type
Technical Publication (TP)
Authors
Saltzman, Edwin J. (Analytical Services and Materials, Inc. Edwards, CA United States)
Wang, K. Charles (Aerospace Corp. El Segundo, CA United States)
Iliff, Kenneth W. (NASA Dryden Flight Research Center Edwards, CA United States)
Date Acquired
September 7, 2013
Publication Date
November 1, 2002
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.60:209032
H-2397
NASA/TP-2002-209032
Funding Number(s)
PROJECT: RTOP 529-50-04-00-RR
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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