Shaft power transfer in gas turbine engines with machines operable as generators or motors

摘要: A multispool gas turbine engine for an aircraft application includes a transmission system which is operative to transfer power between relatively rotatable spools. In first mode the from engine's low pressure spool its high and thereby improve in-flight relight characteristics; in second it intermediate part speed performance; third assist ground starting. With each shaft associated flow displacement machine (64,66,62) operable as pump or motor. other embodiments, differential employed