Patent ID: 11022044

Abstract:
A gas turbine engine including: an engine core including turbine, compressor, and core shaft connecting the turbine to the compressor; a fan; an epicyclic gearbox that: (i) receives input from the core shaft to drive the fan at a lower rotational speed than the core shaft, and (ii) includes a sun gear, ring gear, planet carrier, and planet gears; and a gearbox support. The gearbox has a cross sectional area greater than or equal to 2.4×10−1 m2. A first gearbox support strength ratio of: is greater than or equal to 7.0×10−3; and/or a second gearbox support strength ratio of:  is greater than or equal to 1.0×10−1, where the angle (β) is 2π/N, and N is the number of planet gears.