The Nymbus 650 is an experimental VTOL aircraft developed through a licensing agreement. It uses a patented control method of tilting birotors to control pitch like the International Space Station and Hubble Space Telescope control gyroscopes. The Nymbus 650 is a prototype hobbyist aircraft 45 inches long designed to test an oblique tilting birotor configuration without the complexity of a large main rotor, producing 12 minutes of flight on 3S LiPoly batteries.