Only four countries – Japan, Russia, the UK and the USA – have high-bypass turbofan engines in production. In four or five years, China’s CJ-1000A engine for the Comac C919 is expected to join them.
First impressions are not always reliable, but the CJ-1000AX demonstrator looks impressive. It has nearly the same fan diameter as CFM International’s state-of-the-art Leap-1C engine for the C919, which implies a similar 11:1 bypass ratio. The Chinese powerplant also uses several advanced technologies, including hollow titanium fan blades and 3D-printed fuel nozzles.
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