The skin of a modern fighter may be made of carbon-fiber-reinforced plastic, to save weight, but underneath there is still a lot of metal. That may change in the next generation of combat aircraft, however: Japanese engineers, working on replacing fasteners with glue, are applying composite to the substructure as well as to the skin. A full-scale midfuselage, now undergoing strength testing as part of the technology acquisition effort for Japan’s Future Fighter program, incorporates ...


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