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Minimum induced drag in wing-fuselage interference

Perry A Pepper

Abstract

Note presenting a method for obtaining the minimum induced drag of airfoils in the proximity of ideal internal boundaries. The theorem is applied to the case of an ideal wing-fuselage combination consisting of a lifting line intersecting an infinitely long circular cylindrical fuselage to determine the effect of wing height on the minimum induced drag. The analysis used can be modified for combinations with different fuselage cross sections.

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Key concepts: Fuselage, Drag, Wing, Lift-induced drag, Airfoil, Ideal (ethics), Parasitic drag, Interference (communication)