AeroCopter is moving into the second stage of developing its Mono-Tilt-Rotor (ring) vertical liftoff and landing vehicle, which uses electromagnetic rotary frictionless technology.

These unique aircraft feature counter-rotating Mono-Tilt-Rotor and coaxial twisted electronic blade control. If these aircraft ever come to fruition, I'm sure the maintenance requirements could be a bit unique, too.

These images are of the AeroCopter Mono-Tilt-Rotor two-seat Personal Air Vehicle and Very Light Jet, and the Military/Civilian Unmanned Aerial Vehicle. Credit: AeroCopter/Business Wire