Wind-Tunnel Investigation of the Effects of Spoilers on the Characteristics of a Low-Drag Airfoil Equipped With a 0.25-Chord Slotted Flap Page: 4 of 67
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MR No. A5G23
C2 rolling-moment coefficient (L/qSb)
C.S the rolling-moment coefficient due to spoiler deflection
C0p the rolling-moment coefficient due to rolling ICz/8 ("
P \2V7 V ,
Lp lateral stability coefficient derivative / b2 L pVs
where
L rolling moment, foot-pounds
q dynamic pressure (}pV2), pounds per square foot
p the mass density of air, slugs per cubic foot
b wing span, feet
IX moment of inertia about the X-axis, slug-feet square
S the wing area, square feet
V velocity, feet per second
In addition, the following symbols are employed:
cao angle of attack for infinite aspect ratio, degrees
6SU spoiler deflection from upper surface, degrees
6SL spoiler deflection from lower surface, degrees
,f flap deflection, degrees
pb2V helix angle generated by wing tip in roll, radians
angle of bank, degrees
angle -of sideslip, positive when right wing is forward, degrees
S angle of. yaw, positive when left wing is forward, degrees
t time, seconds
9 fraction of control travel
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Holtzclaw, Ralph W. Wind-Tunnel Investigation of the Effects of Spoilers on the Characteristics of a Low-Drag Airfoil Equipped With a 0.25-Chord Slotted Flap, report, July 23, 1945; (https://digital.library.unt.edu/ark:/67531/metadc279657/m1/4/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.