Patent ID: 8857766

Claim:
An aircraft comprising: a fuselage including a floor extending in a longitudinal plane of the fuselage and separating a first space from a second space accommodated in the fuselage, wherein the first space includes an upper fuselage portion, which is an exterior wall of the aircraft, having a width substantially equal to the width of the floor in the transverse section of the fuselage and being an arced surface, wherein a first distance separating the upper fuselage portion and the floor being substantially constant along the width of the floor, wherein the fuselage includes two other fuselage portions extending between the upper fuselage portion and the floor of the first space and in the second fuselage space, the upper fuselage portion and the two other fuselage portions being portions of an arc of a circle in the transverse section of the fuselage, wherein the upper fuselage portion is connected to a first fuselage portion of the two other fuselage portions at a first joining area forming a first continuous arc therebetween, and the upper fuselage portion is connected to a second fuselage portion of the two other fuselage portions at a second joining area forming a second continuous arc therebetween, and wherein the width between the first joining area and the second joining area is substantially equal to the width of the floor.