Wing-Body Combinations With Wings of Very Low Aspect Ratio at Supersonic Speeds Page: 2 of 63
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NACA RM A56G16.-iuii
3 1176 01434-8404 r
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NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS
WING-BODY COMBINATIONS WITH WINGS OF VERY LOW L
ASPECT RATIO AT SUPERSONIC SPEEDS
By Leland H. Jorgensen and Elliott D. Katzen
Force and moment characteristics of configurations emplijnng wngs
of very low aspect ratio (1 and less) have been determined fd44ch I
numbers of 1.97 and 3.33. The angle-of-attack range was fro4S to (170
for Mach number 1.97 and from 00 to 300 for Mach number 3.334 'The
Reynolds number was about 9x101 , based on body length. i
The results of this investigation indicate that there are distinct
aerodynamic advantages to the use of highly swept wings of very low
aspect ratio. Some of these advantages are high lift effectiveness,
compared to that of wingless missiles, and little drag penalty with
shapes that appear to be beneficial for decreasing aerodynamic heating.
These low-aspect-ratio configurations exhibit small center-of-pressure
shifts and small rolling moments with changes in angle of attack and
Mach number; therefore, stability and control problems are simplified.
Comparisons of theoretical and experimental force and moment
characteristics indicate that existing wing-body interference theory
is not generally adequate for missile configurations employing wings of
very low aspect ratio.
Results of development tests and studies made by various aircraft
companies have shown that for certain applications, missiles employing
wings of very low aspect ratio have excellent aerodynamic characteris-
tics. In other studies attention has been focused on the possible use
of wings of very low aspect ratio by questioning the desirability and
need for wings of large span. There are, however, many gaps in our
knowledge concerning the aerodynamics of missiles having wings of very
low aspect ratio. To help provide some of the required information, an
experimental investigation of the aerodynamic characteristics of a
family of missile-like configurations has been made. A brief discussion
of the results of this investigation was presented in reference 1. The
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Jorgensen, Leland H. & Katzen, Elliott D. Wing-Body Combinations With Wings of Very Low Aspect Ratio at Supersonic Speeds, report, October 26, 1956; (https://digital.library.unt.edu/ark:/67531/metadc62824/m1/2/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.