Narrowbody engine maker CFM International has completed testing of the eCore 3 demonstrator, clearing the last step of early development before testing begins on the first production version of the Leap turbofan engine.
Wrapping up the eCore 3 demonstrator means that the General Electric-Snecma joint venture has accumulated 525h of data over four years on three different builds of the test articles that incorporate all of the advanced technologies that CFM plans to introduce in the series of the engines that will power the Airbus A320neo, Boeing 737 Max and Comac C919.
The results of the eCore 3 demonstration confirmed CFM's initial predictions and bolster the manufacturer's confidence that the final Leap configuration will meet a promise to lower fuel consumption 15% compared with the CFM56.
CFM is introducing a variety of new technologies in the Leap series, including ceramic matrix composites as the material of the stage-one high-pressure turbine, five blisk stages and blades shaped by fourth-generation 3D aerodynamics in the compressor, and fuel nozzles produced using additive manufacturing techniques.
CFM plans to deliver the first production version of the Leap-1A/C design for the A320neo and C919 in less than three months.