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These honeycomb-like drones use advanced networking technology to fly smoothly in large formations. Created as a teaching aid by researchers at ETH Zurich, the Distributed Flight Array consists of at least two modules, linked physically by magnets and electronically by push-pin connections.
Curiously, a single unit cannot fly on its own. The torque from a single rotor is unbalanced, and sends the drone tumbling erratically. Once connected, the units all take off as one, using their rotors, and then fly level to the ground, with sensors providing information about inertia and altitude. A human pilot steers the formation with a joystick.