Electric aircraft propulsion system

A system, comprising:

• a first stator comprising a first one or more stator windings;
• and
• a first rotor and fan assembly positioned in a primary flow path of a nacelle, the first rotor and fan assembly comprising:
• a first fan shroud comprising a one-piece cylindrical fan shroud having a substantially constant radial thickness and having a first outer surface;
• a first plurality of rotor magnets positioned directly on the first outer surface of the first fan shroud and concentric with the first one or more stator windings;
• a first fan hub positioned concentrically interior of the first fan shroud, the first fan hub being coupled to a central support shaft;
• and
• a first plurality of fan blades extending between the first fan shroud and the first fan hub.

An aircraft, comprising:

• a nacelle defining a primary air flow path from an inlet end of the nacelle to an outlet end of the nacelle;
• an electric machine comprising:
• a stator positioned in the nacelle and comprising one or more stator windings;
• and
• a rotor and fan assembly positioned in the primary flow path, the rotor and fan assembly comprising:
• a fan shroud comprising a one-piece cylindrical fan shroud having a substantially constant radial thickness and having an outer surface;
• a plurality of rotor magnets positioned directly on the outer surface of the fan shroud and concentric with the one or more stator windings;
• a fan hub positioned concentrically interior of the fan shroud, the fan hub being coupled to a shaft concentrically aligned with the central support shaft;
• and
• a plurality of fan blades extending between the fan shroud and the fan hub.