Abstract: A supersonic airplane having a wing mounted for pivotal movement between a conventional position orthogonal to the fuselage and an oblique position relative to the fuselage has its vertical pivot axis offset from the mean aerodynamic center of lift of the wing when the wing is in the conventional position. The pivot axis can, for example, be offset rearwardly from the mean aerodynamic center of lift and transversely relative to the fuselage in the direction of the trailing tip of the wing when in an oblique position to counteract pitch and roll moments induced by the aeroelastic effect on the wing and by the center of pressure shift occurring at supersonic flight speeds.