HYBRID POWER PLANT FOR AIRCRAFT

A hybrid aircraft power plant has a gas turbine engine (10) has a high-pressure spool (25) including a high-pressure compressor (25a), a high-pressure turbine (25b), and a high-pressure shaft (25c) drivingly engaging the high-pressure turbine (25b) to the high-pressure compressor (25a), a low-pressure spool (24) including a low-pressure compressor (24a), a low-pressure turbine (24b), and a low-pressure shaft (24c) drivingly engaging the low-pressure turbine (24b) to the low-pressure compressor (24a), an electric motor (32) drivingly engaged to the low-pressure shaft (24c), and a torque-transmitting device operatively connected to the high-pressure shaft (25c) and having an engaged configuration in which the torque-transmitting device drivingly engages the electric motor (32) to the high-pressure shaft (25c) and a disengaged configuration in which the torque-transmitting device disconnects the electric motor (32) from the high-pressure shaft (25c).