airflow path the turbines 46 54 rotationally drive the respective low speed spool 30 and high speed spool 32 in response to the previously mentioned expansion the engine 20 in one example is a high bypass geared aircraft engine in a further example the engine 20 bypass ratio is greater than about six 6 with an example embodiment being greater than ten 10 the geared architecture 48 is an epicyclic gear train such as a planetary gear system or other gear system with a gear reduction ratio of greater than about 2 3 and the low pressure turbine 46 has a pressure ratio that is greater than about 5 in one disclosed embodiment the engine 20 bypass ratio is greater than about ten 10 1 the fan diameter is significantly larger than that of the low pressure compressor 44 and the low pressure turbine 46 has a pressure ratio that is greater than about 5 1 low pressure turbine 46 pressure ratio is pressure measured prior to inlet of low pressure turbine 46 as related to the pressure at the outlet of the low pressure turbine 46 prior to an exhaust nozzle the geared architecture 48 may be an epicycle gear train such as a planetary gear system or other gear system with a gear reduction ratio of greater than about 2 5 1 it should be understood however that the above parameters are only exemplary of one embodiment.