French engineer René Louis Riout designed a four-wing aircraft inspired by dragonflies, hoping its flapping wings could provide a new way to fly. The French military commissioned a full-scale ...

Simulations of a rigid-wing ground-generation airborne wind energy system show that speed-scheduled flap deflection and a ...

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On a warm summer morning at Princeton University, aerospace engineer Aimy Wissa was at the university helipad, preparing to fly a remote-controlled plane. But this wasn’t just any model aircraft.