The Effects of Extensible Rocket Racks on Lift, Drag, and Stability of a 1/10-Scale Rocket-Boosted Model of the McDonnell XF3H-1 Airplane for a Mach Number Range of 0.60 to 1.34 : TED No. NACA DE 31 Page: 2 of 43
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NASA Technical iUbr
NACA RM SL53F15 3 1176 01438 6016
NATIONAL ADVISORY CC1MMITEE FOR AERONAUTICS
.*, RESEARCH MEMORANDUM
" . for the
Bureau of Aeronautics, Department of the Navy
THE EFFECTS OF EXTENSIBLE ROCKET RACKS ON
LIFT, DRAG, AND STABILITY OF A 1/10-SCALE ROCKET-BOOSTED
MODEL OF THE MCDONNELL XF3H-1 AIRPLANE FOR A
MACH NUMBER RANGE OF 0.60 TO 1.34
TED NO. NACA DE 31
By Norman L. Crabill
The results of the first test by the National Advisory Committee
for Aeronautics on the transonic longitudinal characteristics of a
1/10-scale rocket model of the McDonnell XF3H-1 airplane are presented
in this report. The model, flown with a center-of-gravity location of
28.5 percent of the mean aerodynamic chord and a stabilizer setting of
-5.91 relative to the wing chord plane, was equipped with extensible
rocket racks. In the test, which utilized the freely flying rocket-
boosted model technique, the Mach number varied from 0.60 to 1.34, and
the Reynolds number varied from 4.5 to 11 x 106.
The effects of the rocket racks in the extended position on the
trim and static lift, drag, and stability were generally small and within
the accuracy of the data. However, at low supersonic speeds, the racks
caused an increment of about 0.012 in total-drag coefficient and were
evidently responsible for some turbulence which gave rise to some light
buffet and apparently variable dynamic stability. Below a Mach number
of 0.88 and above a lift coefficient of 0.60, the model became statically
unstable and pitched up past the stall. The usual longitudinal param-
eters and derivatives describing lift, drag, and stability of the model,
as measured in this test, are given as functions of Mach number. In
addition, the pressure recovery of the inlet at zero mass flow and an
approximation to the static directional stability derivative are given.
In general, the results of this test agree with the results of tests on
similar models in wind tunnels.
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Crabill, Norman L. The Effects of Extensible Rocket Racks on Lift, Drag, and Stability of a 1/10-Scale Rocket-Boosted Model of the McDonnell XF3H-1 Airplane for a Mach Number Range of 0.60 to 1.34 : TED No. NACA DE 31, report, June 16, 1953; (digital.library.unt.edu/ark:/67531/metadc59639/m1/2/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.