Experimental investigation of the zero-lift drag of a fin-stabilized body of fineness ratio 10 at Mach numbers between 0.6 and 10 Page: 3 of 37
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2 NACA RM A53D02
In the field of missile aerodynamics there is an increasing need
for experimental data at high supersonic Mach numbers for the purpose
of testing the validity of existing theory at these speeds as well as
for direct use in design calculations. At Mach numbers greater than
5 very little aerodynamic data have as yet .been published with which
theoretical predictions can be compared.
One of the fundamental parameters is the drag, which often is
important in considerations of range, velocity, and missile size. It
was the twofold purpose of the investigation described in this report
to provide total drag data for a finned missile configuration over as
wide a range of Mach numbers as possible, and to determine the degree
of accuracy with which existing theoretical methods can be expected to
predict the drag of this and similar configurations throughout the super-
sonic speed range of the test.
The importance of Reynolds number effects was examined with regard
to both the applicability of the test results to other conditions and
to the application of the theory in predicting drag.
During the developmental phase of the testing, some data were
obtained which provide an indication of the effect on total drag of
blunting the fin leading edge.
AB base area of body, sq ft
total drag force
CD total drag coefficient,
CD total zero-lift drag coefficient
ACD integrated average drag increment due to angle of attack
CDb base drag coefficient, base drag force
CD friction drag coefficient, friction drag force
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James, Carlton S. & Carros, Robert J. Experimental investigation of the zero-lift drag of a fin-stabilized body of fineness ratio 10 at Mach numbers between 0.6 and 10, report, June 11, 1953; (digital.library.unt.edu/ark:/67531/metadc59730/m1/3/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.