GE Aerospace led the adoption of carbon fiber polymer matrix composites in commercial jet engines since introducing the GE90 in 1995, the first engine to feature composite fan blades. Replacing traditional titanium with 22 lightweight composite blades reduced engine weight, improved fuel efficiency, and enabled record-setting thrust performance. The lighter material also allowed for larger fan diameters, contributing to overall engine efficiency. Over time, these composite blades have proven more durable than metal alternatives, accumulating more than 300 million flight hours across multiple engine platforms.
Building on the GE90’s success, GE Aerospace expanded composite technology into newer engines. The GEnx engine, introduced in 2004, incorporated both composite fan blades and a composite containment case, and now powers more than two-thirds of Boeing 787 aircraft. Later, through CFM International, a joint venture between GE Aerospace and Safran Aircraft Engines, composite blades and cases were developed for the LEAP engine, which entered service in 2016 for narrowbody aircraft.
“The introduction of the polymer matrix composite fan blade stands as one of the most consequential material innovations in the history of commercial jet engines,” said Nicholas Kray, chief consulting engineer for composite design at GE Aerospace. “It was a game changer for jet engine efficiency — and for durability too.”
The upcoming GE9X engine, designed for the Boeing 777X, represents the most advanced application of this technology. Thanks to improved design capabilities, it uses just 16 composite fan blades—down from 22 in the GE90—while maintaining high performance. These blades are made from carbon fiber woven into polymer resin matrices, allowing engineers to tailor strength, weight, and fatigue resistance.
Looking ahead, GE Aerospace is leveraging decades of composite expertise to support the RISE program, which aims to achieve at least a 20% improvement in fuel efficiency. This includes developing advanced open fan engine designs that prioritize both efficiency and noise reduction. Composites are also being applied to additional engine components, further optimizing weight and performance. Overall, carbon fiber composites remain central to the future of more efficient, durable, and innovative jet engines.
“The runway for innovation just keeps going and going with the application of carbon-fiber composites,” said Kray. “It’s an innovation that not only has made history; it’s poised to continue to lead the way in shaping the future of commercial jet engines.”