Concentric rotor control system

A rotor control system comprising:

• a collective control rod positioned internal to a rotor shaft, the rotor shaft for imparting torque to rotor blades;
• a cyclic control rod positioned internal to and concentric with the collective control rod;
• a first swashplate pivotally attached to the collective control rod;
• a second swashplate rotating relative to the first swashplate about a bearing;
• a first servo translating the collective control rod relative to the rotor shaft;
• a second servo translating the cyclic control rod relative to the collective control rod;
• and
• a controller providing control signals to the first servo and the second servo;
• a third servo rotating the collective control rod about a longitudinal axis of the collective control rod to change the orientation of the first swashplate.

A method for providing collective control and cyclic control to a rotor, the method comprising:

• receiving flight inputs;
• and
• actuating at least one of a first servo and a second servo in response to the flight inputs;
• wherein,
• the first servo is coupled to a collective control rod positioned internal to a rotor shaft, the rotor shaft for imparting torque to rotor blades;
• and
• the second servo is coupled to a cyclic control rod positioned internal to and concentric with the collective control rod;
• wherein a first swashplate is pivotally attached to the collective control rod and a second swashplate rotates relative to the first swashplate about a bearing;
• the method including actuating a third servo to change the orientation of the first swashplate to provide full cyclic control to the rotor.