Aircraft propulsion system

An aircraft propulsion system comprising:

• at least first and second propulsor arrangements, each propulsor arrangement comprising an internal combustion engine, a plurality of propulsors, a shaft, a reduction gearbox arrangement and a motor generator arrangement, the internal combustion engine being configured to drive the plurality of propulsors via the shaft and the reduction gearbox arrangement, each internal combustion engine being coupled to the motor generator arrangement, the motor generator arrangement being configured to drive at least one of the mechanically driven propulsors when in a motor mode, and to generate electrical power when in a generating mode;
• and
• an electrical interconnector configured to transfer electrical power between the first and second propulsor arrangements.