Aircraft propulsion system

An aircraft propulsion system comprising:

• a plurality of engines attached to an aircraft body of an aircraft;
• a plurality of generators connected to an engine shaft of each of the plurality of engines;
• a battery configured to store power generated by the plurality of generators;
• a plurality of motors driven by power supplied from the plurality of generators or power supplied from the battery;
• a plurality of rotors attached to the aircraft body of the aircraft and driven by driving forces output from the plurality of motors;
• a plurality of detectors each configured to detect a temperature of a respective one of the plurality of engines;
• and
• a controller configured to control operating states of the plurality of engines,
• wherein, in a case where the aircraft is flying in a prescribed flight mode, the controller is configured to cause at least a first engine among the plurality of engines to be stopped and a second engine among the plurality of engines, which has not been stopped, to be operated, and
• wherein, in a case where it is detected by a first detector of the first engine, of the plurality of detectors, that the temperature of the first engine is less than or equal to a first defined temperature, the controller is configured to cause the first engine to be operated and the second engine to be stopped.