gasturbine101 shows off his Swarm Manned Aerial Vehicle Multirotor Super Drone, a giant drone capable of lifting a human for about ten minutes. Looks completely unsafe, albeit the British flag on the canopy is a nice touch.
The Swarm man carrying multi-rotor airborne flight testing montage. 54 counter-rotation propellers, six grouped control channels with KK2.15 stabilization. Take off weight 148kg, max lift, approx. 164kg. Endurance10 minutes. Power approx. 22KW.
Just a bit of fun for my self, never intended for making a significant journey or flying much above head height. Approx cost £6000.
Props at 18 in were the largest I could find with contra rotating pitches and so defines much of the layout. Also the fine pitch allows them to turn at high speed which reduces motor weight for a given power. Motor KV chosen to work with 4 cell batteries with 20% or so control margin. This low margin maximises the ESC efficiency, higher margin results in higher circulating current losses in the ESC and motor, reducing endurance.
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