3 ms·

What I'd like to see are more small "drones" with alternate arrangements. Counterrotating Coaxial for example.[1] http://www.youtube.com/watch?v=DUGEjQdoylY ht

• miahi 12y ago
  As many of the other answers say, the current multicopters are very simple, mechanically: an electric motor directly coupled to a fixed-pitch propeller. Everything is controlled by the amount of current the motors receive. Any other alternate arrangement means a more complex mechanical control: servos, gears, larger propellers, variable-pitch propellers... This makes them less reliable, harder to mend and more dangerous (that's one of the reason model helicopters never really caught on, even with modern electronic stabilizers - even a smaller 450-class blade can break bones if you hit it).