A small, hand-launched unmanned aircraft flew for 171 min. in late February powered by a structural battery built into the wing—almost double the 91 min. the 6-ft.-span aircraft was able to stay aloft on previous flights using conventional batteries and wings. By distributing the battery cells into the wing rather than concentrating them in the fuselage, structural batteries have the potential to reduce the weight of aircraft, increase the volume available for payload and extend flight ...


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