FUSELAGE CENTRAL PART AND BEAM Russian patent published in 2012 - IPC B64C1/00 

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering, particularly, to fuselage central parts. Proposed central part comprises skin with frames two of which are furnished with tight walls, center-wing section, wheel leg well, under-fuselage cone and beam. Said beam comprises nose, central and tail sections made up of webs and lateral lengthwise beams. Lateral lengthwise beams represent "П"-channels with flanges bent off the beam. Lengthwise tapes are laid between them and beam bottom web. Beam central section is additionally provided with top web concaved crosswise, transverse wall and lengthwise rib. Beam is secured to fuselage center outer surface. Fuselage skin rests on beam top web and lengthwise beam top lateral flanges. Center-wing section bottom panel is jointed with beam lengthwise rib top edge. Under-fuselage skin is secured on beam lengthwise tapes. Lateral faces of beam lengthwise rib are connected to tight wall of one of the frames and beam transverse wall. Beam sections are provided with lengthwise girders. Central lengthwise beam of central section represents double T-section. Beam lengthwise rib is located above medium lengthwise girder.

EFFECT: reduced weight.

11 cl, 18 dwg