Monospinner: Controllable Flying Vehicle with Single Moving Part

Here is a flying vehicle with a single moving part, making it one of the simplest mechanically controllable machine of its kind. While the Monospinner does not hover like a standard multicopter, it does use feedback control system to maintain equilibrium.

As you can see in the above video, the vehicle can achieve hover after being launched like Frisbee. More information is available here.