Patent ID: 11860622
Assignee: AERGILITY CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC G  B  H | IPC B  G  H

Claim 6:
7. An aircraft, comprising:
a fuselage;
a propulsion engine coupled to the fuselage and configured to generate thrust to propel the aircraft along a first vector during forward flight;
rotors coupled to the fuselage in coaxial pairs and configured to provide lift to the aircraft along a second vector during forward flight, the second vector being different than the first vector, each rotor comprising blades that rotate about a rotor axis, each rotor at an incline angle to a horizontal plane extending through the rotor axes, the incline angle measured below the horizontal plane for upper rotors in the coaxial pairs, measured above the horizontal plane for lower rotors in the coaxial pairs, and mirrored across the fuselage for corresponding coaxial pairs, and the incline angle selected such that operation of each rotor results in a yaw moment acting in a same direction about each rotor axis as a torque generated by each rotor when each rotor operates in autorotation; and
a motor coupled to each rotor, each motor configured to supply power to and draw power from the coupled rotor, the power being supplied to or drawn from each rotor by its corresponding motor adjusting a rotational frequency of the rotor to provide attitude control for the aircraft when the power is supplied to or drawn from each rotor.