Short Brothers Plc

Tony Millar

Robert Samuel Wilson

Derek Simpson

Noise attenuating devices and methods, precursors and abrasive blasting masks for manufacturing noise attenuating devices are disclosed. An exemplary method disclosed herein includes bonding a facing sheet of the noise attenuating device to a cellular core and then perforating the facing sheet. Perforating the facing sheet may be performed by abrasive blasting using a mask configured to prevent the abrasive blasting of an underlying structure.

Methods, precursors, and abrasive blasting masks for manufacturing noise attenuating devices

Precursors, and methods for manufacturing perforated composite parts, an exemplary precursor including structural fibers embedded in a cured matrix material and interposed between two removable plies, where the precursor may also have a sacrificial fiber extending through the removable plies, the matrix material and between the structural fibers.

Methods and precursors for manufacturing a perforated composite part

Precursors and methods for manufacturing perforated composite parts are disclosed. An exemplary precursor () comprises structural fibers () embedded in a cured matrix material () and interposed between two removable plies (). The precursor may also comprise a sacrificial fiber () extending through the removable plies (), the matrix material () and between the structural fibers (). An exemplary method comprises removing the removable plies () from the precursor () and removing the sacrificial fiber () from the precursor after removing the removable plies to form a through hole in the precursor () at a location of the sacrificial fiber ().

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Belfast, United Kingdom

Tony Millar