Elongated journal bearing for high gear ratio epicyclic fan drive gear system

A turbine engine assembly comprising:

• a static engine structure;
• a fan section including a plurality of blades rotatable about an axis;
• a fan drive gear system including:
• a sun gear configured to be driven by an engine shaft rotatable about the axis;
• a plurality of compound intermediate gears, wherein each of the plurality of intermediate gears includes a first gear portion and a second gear portion, wherein the second gear portion comprises a forward gear portion and an aft gear portion;
• a ring gear assembly including a forward ring gear engaged to the forward gear portion and an aft ring gear engaged to the aft gear portion, the ring gear assembly fixed to the static engine structure;
• a carrier supporting rotation of the plurality of intermediate gears, the carrier rotatable about the axis;
• and
• a plurality of journal bearing assemblies corresponding with the plurality of intermediate gears, wherein each of the plurality of journal bearing assemblies comprises a ratio of a journal length to a journal diameter that is between 1.5 and 6 and wherein each of the plurality of journal bearing assemblies includes a plurality of lubricant supply holes that are configured to communicate lubricant to an interface with an inner surface of a corresponding one of the plurality of compound intermediate gears and each of the plurality of compound intermediate gears includes an outlet for exhausting lubricant flow that is disposed between the forward gear portion and the aft gear portion, wherein each of the plurality of journal bearing assemblies includes a forward portion, an aft portion, and a middle portion and wherein each of the forward portion and the aft portion includes a gear bearing surface with an axial width matching an axial width of a corresponding one of the forward gear portion and the aft gear portion of a corresponding one of the plurality of compound intermediate gears, and wherein each of the forward portions and the aft portions include an outer undercut and an inner undercut, the outer undercut facing axially outward and the inner undercut facing axially inward toward the middle portion, wherein the outer undercut and the inner undercut have equal axial lengths;
• and
• a fan drive shaft coupled to the carrier.