| 主权项 |
1. An aircraft comprising:
a fuselage having a longitudinal or X-axis, a wing, and a ventral fairing, the ventral fairing being configured by a symmetrical streamlined surface with respect to the aircraft symmetry plane enclosing together with the fuselage and the wing an inner space, the ventral fairing comprising a first zone of a length L1 along the X-axis, where the area of the cross-section perpendicular to the X-axis of the inner space increases in the direction of air flow, and a second zone of a length L2 along the X-axis, where the area of the cross-section perpendicular to the X-axis of the inner space decreases in the direction of air flow, being L1>L2 and being the second zone is placed at the rear end of said first zone behind the intersection of the trailing edge of the wing with the fuselage, the contour of the cross-sections perpendicular to the X-axis of the ventral fairing being configured by symmetrical curves with respect to the aircraft symmetry plane having a variable curvature and comprising at each side of the symmetry plane in at least some of them at least a convex part, where the lower points (P1, P2) and the most lateral points (P3, P4) of the contour are located, and two concave parts, the contour of the longitudinal sections of the ventral fairing being configured by curves having a variable curvature and comprising, in at least some of them, at least a central convex part and two concave parts ending in their intersections with the fuselage or with the surfaces of the wing. |
