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NuMBERS OF 0.o AND 1.6l,
TED NO. NACA AD 599.
By Earl C. Hastings, Jr., and Waldo L. Dickens
" . SW -W
A flight investigation was conducted to determine the effects of an
inlet modification and rocket-rack extension on the longitudinal trim and
low-lift drag of the Douglas F5D-1 airplane. The investigation was con-
ducted with a 0.125-scale rocket-boosted model which was flight tested at
the Langley Pilotless Aircraft Research Station at Wallops Island, Va.
Results indicate that the combined effects of the modified inlet and-
fully extended rocket racks on the trim lift coefficient and trim angle of
attack were small between Mach numbers of 0.94 and 1.57. Between Mach
numbers of 1.10 and 1.57 there was an average increase in drag coefficient
of about 0.005 for the model with modified inlet and extended rocket racks.
The change in drag coefficient due to the inlet modification alone is small
between Mach numbers of 1.59 and 1.64-.
oINRODUCT
TIO
This paper presents the results of the last phase of a program which
has been conducted by the V!tional Advisory Cammittee for Aeronautics with
rocket-boosted models of the Douglas FAD-l and Douglas F5D-1 airplanes.
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NATIONAL ADVISORY COMITTEE FOR AERONAUTICS , :
S.. - RESEARCH MMORANM
for the <
Bureau of Aeronautics, Department of the Navy.
EFFECTS OF INLET MODIFICATION AND ROCKET-RACK EXTENSIC O
THE LONGITUDINAL TRID AND LCM-LIFT IAG OF THE DOUGLAS
F5D-1. AIRPLANE AS OBTAINED WITH A '0.125-SCALE
ROCKET-BOOSTED MODEL BEN MACu
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