The GEnx is GE’s latest turbofan engine. There are currently two versions available: one for Boeing’s B787 Dreamliner (GEnx-1B) and another for the B747-8 aircraft (GEnx-2B).
This high-tech engine is designed to reduce pollution and noise emissions, decrease operating costs through lower fuel consumption, reduce maintenance costs, and decrease weight to maximise payloads – all without compromising thrust and overall performance.
As a GE partner, Avio holds a 12% share in the programme and is responsible for the design, development, production and overhaul of the accessory drive gearbox, stator parts of the low-pressure turbine and the engine’s lubrication system.
|Max Power at SL||53,000 - 72,300 lb|
|Fan Diameter||111 inches|
|Overall pressure ratio||36.0 - 43.0|
|Bypass ratio||9.6:1 - 43.5|
|Max Power at SL||67,400 lb|
|Fan Diameter||105 inches|
|Overall pressure ratio||43|
Accessory Drive Train
Avio is responsible for the design, development, production and MRO.
The accessory drive train includes the:
The accessory drive train successfully passed all certification tests (bench test and engine) and dynamics tests to confirm the robustness of the kinematic chain in case of limited dynamic phenomena, though confirming the high competences achieved by Avio in the field of dynamic modelling of modern aircraft transmissions.
Low Pressure Turbine
Avio responsibility includes the design, development, production and MRO of the static components of the low-pressure turbine.
The aerodynamic design of the turbine made extensive use of CFD 3D modelling techniques that brought about a reduction in the number of parts and weight, and the attainment of the performance necessary to bring the GEnx to levels of specific fuel consumption improved by 15% with respect to the previous generation of engines of the same thrust class.
Avio developed and is responsible for a significant number of components of the engine lubrication system, such as the
The oil system is common to the GEnx 1B and 2B engines and there are no differences between the two engine models.