A stiffener 8 comprising: a core 30; and a shell 31 which surrounds the core, wherein the shell is formed from a fibre material, and the core comprises: first and second battens 40, 41 arranged side by side; and a spacer 50 between the battens. The stiffener extends in a lengthwise direction, and the battens and the foam spacer have respective lengths which extend in the lengthwise direction of the stiffener. The stiffener may be a stringer for an aircraft wing. The battens may be spaced by a gap, the widths of the battens may decrease in the lengthwise direction and the width of the spacer and gap may increase. The spacer may be formed from foam and the battens may be formed from a fibre material which may be a fibre reinforced composite material.
Stiffener with core and shell
2023-05-24
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |