Patent ID: 8960603
Filing Date: 2015-02-24
Classification: B64C,B64D

Abstract:
1. An aircraft fuselage section located in an aircraft and having pylons for supporting a propulsion system, a transversal section of said fuselage section having a curved shape with at least a vertical symmetry plane and a central longitudinal axis, the fuselage section comprising: a skin; a plurality of frames arranged perpendicularly to said longitudinal axis; an upper longitudinal box extending from one frame to another frame and a lower longitudinal box extending from one frame to another frame, both of which are configured to form together with the skin a closed multi-cell structure, each closed cell including an external side defined by the skin and internal sides defined by said longitudinal boxes; and a plurality of lateral beams that are interconnected with said frames to form together with the skin a structural unity, wherein the closed multi-cell structure provides torsional rigidity and bending stiffness to the aircraft fuselage section; and wherein each of the plurality of frames includes a first frame portion and a second frame portion, wherein the first frame portion extends at least between a first internal side of said lower longitudinal box and a first internal side of said upper longitudinal box, and wherein the second frame portion extends at least between a second internal side of said lower longitudinal box and a second internal side of said upper longitudinal box.