COMPOSITE PROPELLER BLADE FOR FAN AIRCRAFT Russian patent published in 2018 - IPC B64C11/26 B29D99/00 

FIELD: aviation.

SUBSTANCE: aircraft propeller blade comprises a streamlined structure formed by piece of fiber reinforcement (200) obtained by three-dimensional weaving of yarn and a matrix seal, together with spar (60) comprising enlarged portion (62), extending outside the fiber reinforcement and forming a shank of the blade, and shaping portion (61) disposed in housing (206) disposed in fiber reinforcement (200). Fiber reinforcement (200) comprises non-entangled zone (204) forming housing (206) within fiber reinforcement (200). Non-entangled zone (204) is open to lower portion (220) and to trailing edge (230) of fiber reinforcement (200) so as to form opening (231) for introducing shaping portion (61) of spar (60) in housing (206) of the fiber reinforcement. Opening (231) in trailing edge (230) of fiber reinforcement (200) extends to height (H₂₃₁), which is less than height (H₂₀₄) of the housing, so as to leave a retaining portion (232) in trailing edge (230) that partially contacts forming portion (61) of spar (60). Aircraft engine contains many blades. Aircraft contains the aircraft engine.

EFFECT: group of inventions is aimed at increasing the mechanical strength.

13 cl, 9 dwg