Magnetically coupled contra-rotating propulsion stages

A propulsion engine comprising:

• an engine core comprising a compressor, a combustor and a turbine arranged in flow series along an axis;
• a primary magnetic rotor rotationally coupled to the engine core along the axis;
• a primary propulsion rotor coaxially coupled to the primary magnetic rotor, opposite the engine core along the axis;
• a secondary magnetic rotor coaxially arranged about the primary magnetic rotor;
• a secondary propulsion rotor coaxially coupled to the secondary magnetic rotor, opposite the engine core along the axis and adjacent the primary propulsion rotor;
• and
• a magnetic stator coaxially arranged between the primary magnetic rotor and the secondary magnetic rotor, the magnetic stator forming a magnetic coupling between the primary and secondary magnetic rotors to drive the primary and secondary propulsion stages in contra-rotation about the axis.