Patent ID: 11866161
Assignee: nan
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 6:
7. The electric helicopter of claim 2, further comprising
a first swash device, the first swash device having a cylindrical outer periphery with a groove extending in a circular path around the cylindrical outer periphery, the cylindrical outer periphery of the first swash device having an outer diameter that is less than an inner diameter of the first annular rotor, and the first swash device being aligned with the first annular rotor, and the first swash device being movable to control collective and cyclical pitch of the rotor blades; and
a second swash device, the second swash device having a cylindrical outer periphery with a groove extending in a circular path around the cylindrical outer periphery, the cylindrical outer periphery of the second swash device having an outer diameter that is less than an inner diameter of the second annular rotor, and the second swash device being aligned with the second annular rotor, and the second swash device being movable to control collective and cyclical pitch of the rotor blades.