The Jet Engine Reinvented, No Batteries Needed

NASA and GE Aerospace complete the first integrated hybrid-electric turbofan test, targeting a 10% fuel cut for narrowbody airliners

6 May 2026

NASA and GE Aerospace completed the first full integrated ground test of a hybrid-electric turbofan engine at GE's Peebles facility in Ohio last December, confirming that all parts of the system can work together and exceeding the agency's performance targets. Earlier tests had examined individual components separately.

This milestone is the centrepiece of NASA's Hybrid Thermally Efficient Core programme, a cost-sharing contract with GE that targets a 10 per cent reduction in fuel burn compared with the best narrowbody engines flying today.

At the heart of the work is a modified Passport turbofan. Motor-generators built into the engine extract power at one stage of flight and return it at another, eliminating the need for external batteries. That design choice is deliberate: it allows the technology to enter service before next-generation batteries reach the performance levels aviation requires.

Single-aisle jets produce the largest share of commercial aviation's carbon output. Cutting fuel use on this fleet class would reduce costs for carriers and lower emissions across the busiest routes in the world.

"There is no hybrid-electric engine flying today. And that's what we were able to see." – Anthony Nerone, NASA HyTEC project manager

HyTEC feeds into GE and Safran's CFM International RISE programme, which has logged more than 350 hybrid-electric and open-fan tests since 2021. A compact core demonstrator test is planned before the end of the decade.

Commercial service on narrowbody aircraft remains a target for the 2030s. Regulatory approval, manufacturing scale, and integration challenges stand between the Peebles test stand and a certified aircraft. Running high-voltage motor-generator systems at airliner power levels introduces electrical risks that component tests alone cannot fully expose. Those hurdles are unresolved.