I love it. It reminds me of the "mapleseed" machine that has just one blade, instead, and the whole vehicle rotates. Probably it could have been easier to buil

I love it. It reminds me of the "mapleseed" machine that has just one blade, instead, and the whole vehicle rotates. Probably it could have been easier to build if each blade had its own battery, and the flight controller would communicate with blades via radio, eliminating the commutator. Or even put a controller on each, all getting the same R/C input. Or the controller and battery rotate with the rotor, and the only bearing is on the landing gear. The more usual method for this kind of vehicle has a rocket motor at each tip, fueled by high-purity H2O2 going through a catalytic metal sponge before the nozzle, pressurized by centripetal acceleration from a tank at the hub. But those are notoriously noisy.