The Effect of an Operating Propeller on the Aerodynamic Characteristics at High Subsonic Speeds of a Model of a Vertical-Rising Airplane Having an Unswept Wing of Aspect Ratio 3 Page: 4 of 91
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NACA RM A52E06
J propeller advance-diameter ratio,
M free-stream Mach number
n propeller rotational speed, rps
P model-motor shaft power, ft-lb/sec
R propeller-tip radius, ft
r propeller-blade-section radius, ft
q free-stream dynamic pressure, pV2, lb/sq ft
S wing area, sq ft
T propeller thrust, lb
V free-stream velocity, ft/sec
X longitudinal force, parallel to stream and positive in a thrust
y lateral distance from plane of symmetry, ft
a angle of attack, deg
Spropeller-blade angle, deg
8 control-surface deflection with respect to a section of the fixed
surface taken perpendicular to the hinge line of the movable
8a aileron deflection, positive when lift is decreased on the right
tail surface and increased on the left tail surface. (The con-
trol surfaces were deflected differentially to the same angular
8e elevator deflection, positive to increase lift on tail
TI propeller efficiency,
p free-stream mass density of air, slugs/cu ft
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Sutton, Fred B. & Buell, Donald A. The Effect of an Operating Propeller on the Aerodynamic Characteristics at High Subsonic Speeds of a Model of a Vertical-Rising Airplane Having an Unswept Wing of Aspect Ratio 3, report, November 15, 1954; (https://digital.library.unt.edu/ark:/67531/metadc59185/m1/4/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.