Developed and produced by Nexcelle, a joint venture owned 50/50 by Safran Nacelles and MRAS
As an essential complement to the LEAP-1C engine (CFM International), the nacelle is a
system which channels the airflow through the engine and protects it. The nacelle manages
basic functions: aerodynamics, noise alleviation, aircraft braking during landing (thrust
Integrated propulsion system
The Nexcelle nacelle and the C919 jetliner’s turbofan engine form an integrated propulsion
system (IPS). This IPS and the
pylon (COMAC) have been designed with all the partners working in close technical
on the same platform, which allows maximum optimization of the interfaces. The result is
weight and improved performance.
Innovative O-Duct thrust reverser
The C919 nacelle is the first to have a certified thrust reverser with an O-Duct
architecture, actuated by an E-TRAS* electrical
actuation system. This O-Duct architecture, which replaces the traditional two-door "D"
improves aircraft aerodynamics and reduces fuel consumption by 0.5%, i.e. 300 kg per
It facilitates maintenance operations by enabling direct access to the engine.
Electrical Thrust Reverser Actuation System
The E-TRAS system, 100% developed by Safran, is designed and manufactured by five Group
entities**. It replaces the heavier
hydraulic actuation systems that are traditionally used on thrust reversers.
*E-TRAS : Electrical Thrust Reverser Actuation System
**Safran Nacelles, Safran Aircraft Engines, Safran Electronics & Defense, Safran
& Power, Safran Landing Systems & Power, Safran Landing Systems