A spar (102) for an airfoil (100) comprises a core (104), e.g. a foam core, a central structural member (105) extending through the core (104), an outer structural layer (106) surrounding the core (104) and central structural member (105) and a plurality of yarns (166,168) extending through the central structural member (105).
REINFORCED PROPELLER BLADE AND SPAR
VERSTÄRKTES PROPELLERBLATT UND HOLM
PALE D'HÉLICE ET LONGERON RENFORCÉS
2020-02-26
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |