Systems and methods for, and components of, gearboxes for eVTOL aircraft

An electrical propulsion system for a vertical take-off and landing (VTOL) aircraft possessing a lightning ground path, the electrical propulsion system comprising:

• at least one electrical engine mechanically connected directly or indirectly to an aircraft frame of the VTOL aircraft and electrically connected to an electrical power source, the electrical engine comprising:
• an electrical motor having a stator and a rotor;
• an inverter assembly that provides power to the electrical motor;
• a main shaft, wherein a first end of the main shaft is mechanically coupled to the rotor;
• a propeller flange assembly, wherein a second end of the main shaft is mechanically coupled to the propeller flange assembly;
• and
• a bearing located in the electrical engine that provides a grounding path from the propeller flange assembly to the aircraft frame.

A method for operating an electrical propulsion system for a vertical take-off and landing (VTOL) aircraft possessing a lightning ground path, the method comprising:

• operating at least one electrical engine of the VTOL aircraft, the at least one electrical engine being mechanically connected directly or indirectly to an aircraft frame of the VTOL aircraft and electrically connected to an electrical power source, wherein the at least one electrical engine comprises:
• an electrical motor having a stator and a rotor;
• an inverter assembly that provides power to the electrical motor;
• a main shaft, wherein a first end of the main shaft is mechanically coupled to the rotor;
• a propeller flange assembly, wherein a second end of the main shaft is mechanically coupled to the propeller flange assembly;
• and
• a bearing located in the electrical engine that provides a grounding path from the propeller flange assembly to the aircraft frame.