A FAN DRIVE GEAR SYSTEM FOR DRIVING A FAN IN A GAS TURBINE ENGINE HAVING A HIGH BYPASS RATIO

摘要

A gas turbine engine includes a fan section that includes a fan rotatable about an axis of rotation of the gas turbine engine. A speed reduction device is connected to the fan. The speed reduction device includes a star drive gear system with a star gear ratio of at least 1.5. A bypass ratio is greater than about 11.0.