Gas turbine engine assembly and methods of assembling same

摘要

A method facilitates assembling a gas turbine engine (10). The method comprises coupling a low-pressure turbine rotatable (14) about a drive shaft (32) to a counter-rotating fan assembly (16) including a first fan assembly (50) and a second fan assembly (52) wherein the first fan assembly rotates in a first direction (80) and the second fan assembly rotates in an opposite second direction (82). The method also comprises coupling a radial gearbox (100) substantially circumferentially about the drive shaft such that an input (104) of the gearbox is coupled to the low-pressure turbine and an output (106) of the gearbox is coupled to the counter-rotating fan assembly, and such that the gearbox is positioned within a lubrication fluid sump (170) that substantially circumscribes the gearbox.