Experimental Investigation of the Low-Speed Static and Yawing Stability Characteristics of a 45 Degrees Sweptback High-Wing Configuration with Various Twin Vertical Wing Fins Page: 4 of 26
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NACA TN 2534
Cy lateral-force coefficient (Y/qSy)
C1 rolling-moment coefficient (L'/qSb)
Cn yawing-moment coefficient (N/qSb)
L lift, pounds
M pitching moment, foot-pounds
Y lateral force, pounds
L' rolling moment, foot-pounds
N yawing moment, foot-pounds -
q free-stream dynamic pressure, pounds per square foot (pV2/2)
p mass density of air, slugs per cubic foot
V free-stream velocity, feet per second
b wing span (unless otherwise noted), measured perpendicular to
fuselage center line, feet
S area, square feet
c chord, measured parallel to fuselage center line, feet
A aspect ratio (b2/S)
mean aerodynamic chord, feet 1b/2c2dy)
x distance measured in wing chord plane from leading edge of
root chord to quarter-chord point of any chord, feet
7 distance measured in wing chord plane from leading edge of
root chord to quarter-chord point of C, feet
( b/2 cx dy
ZW wing height, perpendicular distance from fuselage center line
to wing chord plane (positive when wing is above fuselage
center line), feet
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Goodman, Alex & Wolhart, Walter D. Experimental Investigation of the Low-Speed Static and Yawing Stability Characteristics of a 45 Degrees Sweptback High-Wing Configuration with Various Twin Vertical Wing Fins, report, November 1951; (https://digital.library.unt.edu/ark:/67531/metadc56210/m1/4/: accessed March 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.