An aircraft defining a longitudinal direction, a vertical direction, and a lateral direction, the aircraft comprising: a fuselage extending between a forward end and an aft end along the longitudinal direction, the fuselage defining a surface (302, 304); a stabilizer attached to the fuselage and extending between a leading edge and a trailing edge; a boundary layer ingestion fan mounted to the fuselage, the boundary layer ingestion fan defining a centerline and comprising a plurality of fan blades rotatable about the centerline and a nacelle surrounding the plurality of fan blades; wherein the surface (302, 304) of the fuselage defines: a first point located in a plane perpendicular to the longitudinal direction and positioned where the leading edge of the stabilizer meets the fuselage; a second point located in a plane perpendicular to the longitudinal direction and positioned where the trailing edge of the stabilizer meets the fuselage; an inflection point (314, 324); characterized by: the boundary layer ingestion fan being mounted at the aft end of the fuselage; the fuselage further defining: a first portion (316, 326) of the surface, the first portion extending between the first point and the inflection point, the first portion being convex; and a second portion (318, 328) of the surface, the second portion extending between the inflection point and the second point, the second portion being concave. a fuselage extending between a forward end and an aft end along the longitudinal direction, the fuselage defining a surface (302, 304); a stabilizer attached to the fuselage and extending between a leading edge and a trailing edge; a boundary layer ingestion fan mounted to the fuselage, the boundary layer ingestion fan defining a centerline and comprising a plurality of fan blades rotatable about the centerline and a nacelle surrounding the plurality of fan blades; wherein the surface (302, 304) of the fuselage defines: a first point located in a plane perpendicular to the longitudinal direction and positioned where the leading edge of the stabilizer meets the fuselage; a second point located in a plane perpendicular to the longitudinal direction and positioned where the trailing edge of the stabilizer meets the fuselage; an inflection point (314, 324); characterized by: the boundary layer ingestion fan being mounted at the aft end of the fuselage; the fuselage further defining: a first portion (316, 326) of the surface, the first portion extending between the first point and the inflection point, the first portion being convex; and a second portion (318, 328) of the surface, the second portion extending between the inflection point and the second point, the second portion being concave. a first point located in a plane perpendicular to the longitudinal direction and positioned where the leading edge of the stabilizer meets the fuselage; a second point located in a plane perpendicular to the longitudinal direction and positioned where the trailing edge of the stabilizer meets the fuselage; an inflection point (314, 324); characterized by: the boundary layer ingestion fan being mounted at the aft end of the fuselage; the fuselage further defining: a first portion (316, 326) of the surface, the first portion extending between the first point and the inflection point, the first portion being convex; and a second portion (318, 328) of the surface, the second portion extending between the inflection point and the second point, the second portion being concave. the boundary layer ingestion fan being mounted at the aft end of the fuselage; the fuselage further defining: a first portion (316, 326) of the surface, the first portion extending between the first point and the inflection point, the first portion being convex; and a second portion (318, 328) of the surface, the second portion extending between the inflection point and the second point, the second portion being concave. a first portion (316, 326) of the surface, the first portion extending between the first point and the inflection point, the first portion being convex; and a second portion (318, 328) of the surface, the second portion extending between the inflection point and the second point, the second portion being concave.