A spar for a propeller blade comprises central structural member (21) extending from a root to a tip (10) of the spar (22). A first portion (22a) of the central structural member extends from the root of the spar (22) and a second portion (22b) extends from the tip (40) and adjoins the first portion (22a). The central structural member (21) includes a first plurality of plies of composite material on a pressure side (4) thereof and a second plurality of plies of composite material on a suction side (8) thereof wherein the first plurality of plies are in contact with the second plurality of plies in the second portion (22b) from a leading edge (30) to a trailing edge thereof (32). A plurality of yarns extends through the central structural member in at least the second portion.
REINFORCED PROPELLER BLADE AND SPAR
VERSTÄRKTES PROPELLERBLATT UND HOLM
PALE D'HÉLICE ET LONGERON RENFORCÉS
2020-07-08
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |