AIRCRAFT COMPOSITE ELEVATOR Russian patent published in 2025 - IPC B64C5/02 B64C9/00 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, particularly, to elevator to be used in empennage of wide-body long-range aircraft. Proposed composite elevator comprises top and bottom structural panels jointed together in rear edge by means of splitter and in leading edge with the help of detachable front ends, transverse structural set and lengthwise structural set. Wherein transverse structural set comprises fifteen ribs of channel section and twelve aluminium diaphragms. Lengthwise structural set includes side member from polymer composite material based on carbon fibre, wherein the laying of layers of carbon fibre consists of stacks from 1 to N with layers from 1 to n with laying direction angles of 0°/±45° with percentage of layers in laying: 42.9% in direction 0°/90°, 57.1% in directions +45°, wherein said sections feature different cross-section thickness over spar length. Upper panel is a three-layer cellular panel including upper and lower skins, between which honeycomb units are arranged, wherein skins are made of polymer composite material based on carbon fibre, wherein the laying of layers of carbon fibre consists of stacks from 1 to N with layers from 1 to n with laying direction angles 0°/±45° with percentage of layers in laying: 42.9% in direction 0°/90°, 57.1% in directions ±45°, wherein skins have zones with different thicknesses. Lower panel is a three-layer honeycomb panel including upper and lower skins, between which honeycomb units are arranged, wherein skins are made of polymer composite material based on carbon fibre, wherein the laying of layers of carbon fibre consists of stacks from 1 to N with layers from 1 to n with laying direction angles 0°/±45° with percentage of layers in laying: 42.9% in direction 0°/90°, 57.1% in directions ±45°, wherein skins have zones with different thicknesses.

EFFECT: obtaining a design for an aircraft elevator made of large-sized polymer composite material with the required strength and weight characteristics.

15 cl, 2 dwg