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
08.07.2020
Patent
Elektronische Ressource
Englisch
IPC: | B64C AEROPLANES , Flugzeuge |