We’re not entirely sure what to call this one. It’s got the usual trappings of a drone, but with only a single rotor it clearly can’t be called by any of the standard multicopter names. Helicopter?

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. In flight, the drone resembles a giant seed pod, lofted in the ...

Multirotor drones may get all the glory, but fully rotating "monocopters" are actually much more energy-efficient. A new one distinguishes itself even further, as it can squeeze through narrow spaces ...