AIRCRAFT WING TORSION BOX COMPOSITE REAR SPAR Russian patent published in 2025 - IPC B64C3/18 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering. Aircraft wing torsion box composite rear spar is made in the form of a beam from polymer composite material based on carbon fibre. Spar includes wall (5) with upper (3) and lower (4) belts turned inside torsion box. Polymer composite material laying includes from 1 to N packs consisting of 1 to n layers with laying angles 0°/±45/90° with percentage of layers in laying: 9.1% in direction 0°, 72.7% in directions ±45°, 18.2% in direction 90°. In each section along chord spar has in wall and belts laying of polymer composite material layers that is identical in direction. Spar walls and belts have variable thickness throughout the length.

EFFECT: reducing the total weight of the entire torsion box structure and increasing the specific strength and specific rigidity of the torsion box structure.

2 cl, 2 dwg