Aerodynamic Characteristics at a Mach Number of 6.8 of Two Hypersonic Missile Configurations, One With Low-Aspect-Ratio Cruciform Fins and Trailing-Edge Flaps and One With a Flared Afterbody and All-Movable Controls Page: 2 of 21
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NACA RM L58D24 ..
NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS
RESEARCH MEMORANDUM
AERODYNAMIC CHARACTERISTICS AT A MACH NUMBER
OF 6.8 OF TWO HYPERSONIC MISSILE CONFIGURATIONS, ONE WITH
LOW-ASPECT-RATIO CRUCIFORM FINS AND TRAILING-EDGE FlAPS
AND ONE WITH A FLARED AFTERBODY AND
ALL-MOVABLE CONTROLS*
By Ross B. Robinson and Peter T. Bernot
SUMMARY
An investigation has been made to determine the aerodynamic charac-
teristics in pitch at a Mach number of 6.8 of hypersonic missile configu-
rations with cruciform trailing-edge flaps and with all-movable control
surfaces. The flaps were tested on a configuration having low-aspect-
ratio cruciform fins with an apex angle of 50; the all-movable controls
were mounted at the 46.7-percent body station on a configuration .having
a 100 flared afterbody. The tests were made through an angle-of-attack
range of -2 to 200 at zero sideslip in the Langley 11-inch hypersonic
tunnel.
The results indicated that the all-movable controls on the flared-
afterbody model should be capable of producing much larger values of
trim lift and of normal acceleration than the trailing-edge-flap con-
figuration. The flared-afterbody configuration had considerably higher
drag than the cruciform-fin model but only slightly lower values of lift-
drag ratio.
INTRODUCTION
In order to obtain information on stability and control of configu-
rations that offer promise as hypersonic missiles, an investigation of a
family of missile models has been undertaken. The initial phases of the
investigation are reported in reference 1 for a Mach number of 2.01 and
in reference 2 for Mach numbers from 2.29 to 4.65. Included in reference 1
are the results of tests of some canard control surfaces for configurations
with a flared afterbody and with cruciform fins.
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Robinson, Ross B. & Bernot, Peter T. Aerodynamic Characteristics at a Mach Number of 6.8 of Two Hypersonic Missile Configurations, One With Low-Aspect-Ratio Cruciform Fins and Trailing-Edge Flaps and One With a Flared Afterbody and All-Movable Controls, report, August 4, 1958; (https://digital.library.unt.edu/ark:/67531/metadc53265/m1/2/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.