Aircraft ventral fairing with an improved storage capacity

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.