Hybrid propulsion systems with power sharing

A method comprising:

• controlling, by a controller, a power sharing module configured to mechanically control a ratio of mechanical energy derived from a gas turbine engine of a parallel propulsion unit:
• used to drive a propulsor of the parallel propulsion unit that provides forward propulsion of an aircraft, and
• used by an electrical machine of the parallel propulsion unit to generate electrical energy for output via one or more electrical busses of the aircraft, wherein a plurality of series propulsion units of the aircraft provide vertical propulsion to the aircraft using electrical energy received from the one or more electrical busses;
• and
• selectively causing, by the controller, the power sharing module to cause all of the mechanical energy derived from the gas turbine engine to be used to generate electrical energy.

A method comprising:

• controlling, by a controller, a power sharing module configured to mechanically control a ratio of mechanical energy derived from a gas turbine engine of a parallel propulsion unit:
• used to drive a propulsor of the parallel propulsion unit that provides forward propulsion of an aircraft, and
• used by an electrical machine of the parallel propulsion unit to generate electrical energy for output via one or more electrical busses of the aircraft, wherein a plurality of series propulsion units of the aircraft provide vertical propulsion to the aircraft using electrical energy received from the one or more electrical busses;
• and
• selectively causing, by the controller, the power sharing module to cause all of the mechanical energy derived from the gas turbine engine to be used to drive the propulsor of the parallel propulsion unit.