An aircraft that includes backup power.The aircraft (1) comprises a main power supply (12), a propulsion motor (m, M1... M4) and a standby power supply (14). It includes a pressurized air source (15) and a generator (19) coupled to a turbine (18) connected to the pressurized air source (15).The aircraft includes a controller (10) configured to monitor the operation of the main power supply (12). During normal operation, the controller controls the off state of standby power supply (14) and motor power supply (m, M1... M4) through main power supply (12). If the main power supply (12) fails,The controller controls the activation state of the standby power supply (14) and the motor power supply (m, M1... M4) through the standby power supply (14).Abstract figure: Figure 2
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