Dual skinned structures

摘要

A dual skinned structure comprises a first skin 12, a second skin 14 and an intermediate structure 16. The intermediate structure comprises a plurality of first contact portions 18 connected to an interior surface of the first skin, a plurality of second portions 20 connected to an interior surface of the second skin and a plurality of interconnecting portions 22 integral to the first and second contact portions and extending between ones of the first and second contact portions to form an internal structure alternating between the interior surfaces of the first and second skins. The first and second skins and the intermediate structure may comprise fibre reinforced composite material. In forming the structure use may be made of releasable mandrels and deltoid fillers. The dual skinned structure may have an aerofoil section such as winglets.