Nexcelle’s engine nacelle on CFM International’s LEAP-1C turbofan engine Integrated Propulsion System (IPS), will provide key operation...
Nexcelle’s engine nacelle on CFM International’s LEAP-1C turbofan engine Integrated Propulsion System (IPS), will provide key operational advantage to the new generation Chinese COMAC C919 airliner.
The LEAP-1C is the exclusive western powerplant for COMAC’s C919, and is the first new-generation Integrated Propulsion System for an airliner. Nexcelle’s nacelle is a key contributor to the IPS operational advantages, which include improved aerodynamics, lower weight, higher reliability and easier maintenance.
With the first LEAP-1C engine now undergoing evaluations on a modified GE Aviation Boeing 747 flying testbed aircraft at Victorville, California, USA, Nexcelle is providing continuing support for this activity – and is preparing for COMAC’s subsequent startup of C919 prototype flight testing in Shanghai, China.
Key features of Nexcelle’s IPS nacelle system for the LEAP-1C include an all-new translating O-Duct thrust reverser configuration; a fan cowl that is structurally integrated to the engine; an integrated mounting system for reduced engine distortion and enhanced on-wing performance; along with a low drag front end that incorporates a directed flow nozzle deicing system. The IPS’ installed performance is further enhanced by a low drag, low weight pylon developed by COMAC concurrently with the nacelle.
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Nexcelle’s first O-Duct nacelle component to equip CFM International LEAP-1C engines on COMAC’s C919 jetliner is readied for shipment from Aircelle. Image Credit: Nexcelle
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A major innovation in Nexcelle’s nacelle design for the LEAP-1C is its one-piece composite O-Duct configuration, which replaces a traditional thrust reverser’s two-piece “D” doors. When deployed, the O-Duct moves aftward to the reverse thrust position, eliminating drag links in the engine’s secondary flow-path, enhancing the airflow path and improving fuel consumption – while also increasing thrust reverser efficiency. The O-Duct deployment is performed with an evolved electrical thrust reverser actuation system.
Another of the nacelle system’s technological advances is the directed flow nozzle deicing system, which more efficiently swirls engine bleed air within the inlet lip – providing weight, efficiency and maintainability improvements from traditional nacelle deicing systems that use Piccolo tubes.
Nexcelle’s LEAP-1C nacelle also incorporates the extensive use of lightweight and noise-attenuating composite materials, benefitting from the proven experience of the joint venture’s parent companies in their respective nacelle and thrust reverser product lines.
In parallel, Nexcelle’s two parent companies – Aircelle (Safran) and GE Aviation’s Middle River Aircraft Systems (MRAS) – are completing their industrial set-up for LEAP-1C nacelle series production, working closely with their supply chains.
The establishment of Nexcelle’s support infrastructure for C919 operators also is moving forward, involving the creation of an on-line customer portal and the organization of support/services resources within its parent companies.
Headquartered in Cincinnati, Ohio, USA, Nexcelle is a 50/50 joint venture of Safran (Aircelle) and GE Middle River Aircraft Systems (MRAS), which are leading suppliers of engine nacelles, thrust reversers and aerostructures.
