I know it's a long name for a UFO, but hear me out. After fidgeting a while with a fidget spinner I began pondering on how I could get a UFO aircraft to lift, and to move in a similar fashion as the fidget spinner does. My theory involves a structural base build similar to that of a fidget spinner, but with a generated magnetic field, an alloy turbine, an alloy jet propulsion engine, and an alloy ball bearing system. The center of the aircraft would theoretically stay stationary much like the center portion of the fidget spinner does, and would house the pilots as well as a center communication and navigation terminal which would also remain stationary when the aircraft's iron weighted wings/propeller blades spun around the magnetic outer casing of the hub. Atop, and below the center construct would lie two jet/wind propulsion engines which would tie-in with the magnetically propelled rotary blades which in themselves will act as a windmill does, and power portions of the aircraft's electronics ...
Outside of the main pilot housing the three iron tipped rotary blades would be propelled inside a metal disc shaped casing with an outer ball bearing, and ventilation system which would allow for faster rotation of the rotary blades/wings without the heat of friction interfering with the aircraft. The outer shell would be attached to the top, and bottom jet, and jet engine housings to help in the capture of the inner wind flow for the windmill based energy component/s. Theoretically the flowing air could also be harnessed as it's own jet propulsion system through an engine that would allow for it. The purpose of the top, and bottom jets would be solely for movement through the air after the rotary/turbine system lifts the aircraft into the air (like a helicopter), and maintains altitude through the vented casing, and rotary system. I don't know if I mentioned it earlier, but the turbine which is adhered to the inner chamber's outer magnetic layer would be the starting engine for lift off, and maintained altitude. It too would have to be tied to an engine located at the bottom/top of the aircraft. As far as landing goes the layer of thrusters on the bottom half of the aircraft would be pivotal, and allow for hovering capabilities that can be cut off through valve breathers within the thrusters.
As the center turbine rotates the magnetic casing the magnetic field created (through north & south polarity) would cause the wings/propeller blades to rotate in a perpetual motion in the opposite direction creating lift, and powering the electronic components/engines with a windmill-like power source. Through the speed of propeller blade rotation this power could effectively be increased through the control chamber's computer control system. With an electric turbine, perpetual windmill action, and electrically motivated control hub this aircraft could fly around for quite a while. Factor in a propulsion system that utilizes the wind inside the disc structure, and it would decrease the need for electric power even more.
That is all a theory though, and you can take it as you see fit. From me to you I think it would work if done right.