Almost unbelievably, here's an amazing YouTube video of "The Swarm" a man-carrying, multi-rotor airborne flight testing sequence. The huge super drone has 54 counter-rotation propellers, six grouped control channels with KK2.15 stabilization with a take off weight of an incredible 148kg (368 lbs.), max lift of approximately 164kg and a flight endurance of 10 minutes. Power rated around 22KW!
Read the full description on the YouTube video of its flight here.