Patent ID: 11905887
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 1:
2. The aircraft power and propulsion system of claim 1, wherein the restart procedure further comprises:
operating one or more of the electric machines of the first gas turbine engine as one or more generators to extract mechanical power and generate electrical power from one or more of the spools of the first gas turbine engine; and
after supplying electrical power from the electrical energy storage system to the electric machines of the second gas turbine engine and prior to restarting the second gas turbine engine, transferring, via the electrical system, electrical power generated by the one or more electric machines of the first gas turbine engine to the one or more electric machines of the second gas turbine engine and operating the one or more electric machines as one or more motors to increase the speed of the one or more spools of the second gas turbine engine.