GEARBOX GEAR AND NACELLE ARRANGEMENT

摘要

A gas turbine engine is provided that includes a spool that supports an engine. A gearbox is operatively coupled to the spool through a transmission device configured to transfer rotational drive from the spool to the gearbox. An accessory drive component is coupled to the gearbox. The gearbox is arranged radially between the gas turbine engine and a nacelle that is arranged about the gas turbine engine. A gear is supported by the gearbox and configured to transmit rotational drive to the accessory drive component. The gear includes an iron alloy having a strength of approximately 1900 MPa or greater and a shear fracture toughness of 130 MPa√{square root over (M)} or greater in one example. The gears have teeth with a case hardness of approximately 44 HRC or greater. The teeth have a surface finish of less than 16mu/in.