A gas turbine engine includes a spool (30), a turbine (46) coupled to drive the spool (30) and a propulsor (42) that is coupled to be driven by the turbine (46) through the spool (30). A gear assembly (48) is coupled between the propulsor (42) and the spoo...

A fan gear drive system includes a torque frame (56) having a base (61) with integrated gear shafts (58) circumferentially spaced relative to one another. Each shaft provides a shaft axis (T). A bearing assembly (60) is mounted on each of the gear shafts (...

The power transmission comprises a compressor rotor shaft (100), a turbine rotor shaft (200), and a frictional coupling device (320) connected by the compressor and turbine rotor shafts. The coupling device: is formed so that the frictional connection is g...

A planetary gear reduction system (1) has a sun gear (5), a plurality of planet gears (7), a ring gear (9), and a planet carrier (11). The planet carrier (11) has a first plate (17) supporting one ends of planet shafts (13) supporting the planet gears, a s...

A planet gear journal (62) for an epicyclic gear system (46) is asymmetrically formed to compensate for carrier twist. The asymmetry may be between a pair of opposed outwardly open annular channels (100,102) inboard of a bearing surface (64) of the journal...

The uniaxial gas turbine system of the present invention has a uniaxial gas turbine, a rotary machine driven by the uniaxial gas turbine, a continuously variable speed transmission of transmitting a drive force from the uniaxial gas turbine to the rotary m...

The variable cycle engine has a main propulsor (1) generating supersonic flight thrust, and an auxiliary engine (16) generating thrust for take off and landing and subsonic flight. The auxiliary unit has a gas generator and a mechanism (20) transmitting pa...