Why Didn’t I Think of That, Volume 746: Drones With Opposing Rotors
This drone appears to have stacked rotors, spinning in opposite directions. That’s not exactly a new idea. Prop planes have had opposing rotors on their engines going back to Howard Hughes. It certainly solves the problem of having four or six or eight cuisinart blades hanging off your drone, ready to hack at people and things if you get too close. Great stuff.