An investigation of a wing-propeller configuration employing large-chord plain flaps and large-diameter propellers for low-speed flight and vertical take-off Page: 4 of 95
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NACA TN 3307 3
CNpl propeller normal-force coefficient, Propeller normal force
q i
CX" longitudinal-force coefficient, Longitudinal force
q"S/2
Te" thrust coefficient, T
c" . D2
A aspect ratio
b wing span, ft; also, propeller blade chord, ft
c wing chord, ft
F mean aerodynamic chord, 2 J 0 c2dy, ft
d slipstream diameter at leading edge of wing, ft
D propeller diameter, ft
h propeller-blade thickness, ft
L lift, lb
N number of propellers
pv2
q free-stream dynamic pressure, V , lb/sq ft
,, T
q dynamic pressure in slipstream, q + --, b/sq ft
i D2
r radius to propeller blade element, ft
R radius to propeller tip, ft
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Kuhn, Richard E. & Draper, John W. An investigation of a wing-propeller configuration employing large-chord plain flaps and large-diameter propellers for low-speed flight and vertical take-off, report, December 1954; (https://digital.library.unt.edu/ark:/67531/metadc57315/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.