GAS TURBINE ENGINE WITH CLUTCH SYSTEM

A gas turbine engine (10; 100) having: an engine core having, in serial flow communication, a low-pressure compressor (12a), a high-pressure compressor (14a), a high-pressure turbine (14b) drivingly connected to the high-pressure compressor (14a), and a low-pressure turbine (12b) drivingly connected to an output shaft (18); and a clutch (40; 140) having a disengaged configuration in which the low-pressure turbine (12b) is drivingly disconnected from the low-pressure compressor (12a) such that, in the disengaged configuration, the clutch (40; 140) disengages the low-pressure turbine (12b) from the low-pressure compressor (12a), and an engaged configuration in which the low-pressure turbine (12b) is drivingly connected to the low-pressure compressor (12a), the low-pressure turbine (12b) drivingly connected to the output shaft (18) in both of the engaged and disengaged configurations of the clutch (40; 140).