1967•Journal of AircraftRequires access

Minimum swept-wing induced drag with constraints on lift and pitching moment.

J. L. Lundry

Abstract

A = coefficient for span-loading series CD = drag coefficient CL = lift coefficient CM = pitching-moment coefficient ACM = CM contributed by the nonelliptical portion of the span loading N = number of terms in the span-loading series S = reference area for coefficients a = aspect ratio b = span c = chord ci = section lift coefficient Cm = section pitching-moment coefficient m = mean aerodynamic chord x, y = longitudinal and lateral coordinates A = quarter-chord sweep angle 0 = transformed lateral coordinate, cos0 — —2y/b = taper ratio

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Key concepts: Lift-induced drag, Wing, Lift-to-drag ratio, Drag, Vortex lift, Pitching moment, Angle of attack, Lift (data mining)