AIRCRAFT WING TIP Russian patent published in 2025 - IPC B64C3/00 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to aircraft engineering, particularly, to aircraft wing tip made of polymer composite material. Aircraft wing tip is characterized in that it includes a torsion box consisting of three spars, an upper and a lower panel made of a polymeric composite material, wherein the middle spar acts as a stringer for the upper and lower panel; nose part coupled with tip torsion box consists of end and root zones. At that, the root zone includes four aluminium diaphragms connected by a wall made of a polymer composite material, made of a polymer composite material upper and lower panels fixed at the ends on the aluminium diaphragms, along the rear edge – to the aluminium tapes installed for joining with the wing tip panels, by the leading edge – to the wall, aluminium front ends, coupling the upper and lower panels, end part includes aluminium diaphragm and forming the leading edge aluminium front edges; tail part jointed with tip torsion box consists of end and root zones. Wherein said end zone is composed by three-ply cellular panel with sheaths of polymer composite material and cellular filler. Note also that cam of polymer composite material is arranged along rear edge to joint top and bottom panels together. Docking with tip torsion box panels is made by means of rejoining aluminium tapes, root zone includes three aluminium diaphragms connected by a wall of polymer composite material, an upper and lower panel of polymer composite material, attachment to panels of the caisson is performed by means of alternating aluminium tapes; with that, end and root zones are attached to each other through an aluminium diaphragm.

EFFECT: reducing the weight of the aircraft wing tip while maintaining its strength characteristics with increased dimensions of the final structure.

2 cl, 3 dwg