CENTRAL PART OF FUSELAGE AND BIMS IN FUSELAGE COMPARTMENT Russian patent published in 2024 - IPC B64C1/00 

FIELD: aircraft building.

SUBSTANCE: invention relates to a beam device located in the central part of the aircraft fuselage designed to compensate for the loss of fuselage rigidity in the area of the cut-out for the main landing gear compartment. The central part of the fuselage comprises the front and rear pressurized frames, the centre section, the niche of the main landing gear and the beam, including a lower panel, which has a middle unsealed part, which consists of spars, transverse stiffeners and a top panel, front and rear sealed parts. Moreover, the middle unsealed part of the bottom panel of the beam is narrower in width than the front and rear sealed parts of the bottom panel. The front part of the lower panel of the beam is extended beyond the front pressurized frame of the central part of the fuselage to the junction with the front part of the fuselage and is docked with the side panels of the central part of the fuselage and with the front pressurized frame at the junction points. The rear part of the lower panel of the beam is extended beyond the rear pressurized frame of the central part of the fuselage to the junction with the front part of the fuselage and is docked with the side panels of the central part of the fuselage and with the rear pressurized frame at the junction points. The lower panel of the beam forms the lower outline of the central part of the fuselage due to the fact that it is made without expansion in the centre section area. The group of inventions also relates to beams for the fuselage compartment.

EFFECT: reduction in the weight of the aircraft and an increase in the manufacturability of the fuselage.

8 cl, 10 dwg