TechnologyGE Aerospace completes hybrid electric turbofan ground test for single-aisle aircraft
GE Aerospace has completed a ground test of a hybrid electric turbofan engine system designed for single-aisle commercial aircraft, its first full demonstration of power extraction, transfer, and reintegration within a high-bypass turbofan. The test was carried out in 2025 using a modified Passport engine as part of a NASA-backed research program.
The trial focused on integrating electric motor-generators directly into the gas turbine architecture, allowing electrical power to be extracted from the engine and reintroduced during different operating phases. Unlike many hybrid electric concepts, the system was demonstrated without the use of batteries or other onboard energy storage, relying instead on engine-generated electrical power.
According to GE Aerospace, the objective is to support a narrowbody hybrid electric architecture capable of supplementing mechanical power during specific flight segments, such as takeoff or climb, while reducing overall fuel consumption. By avoiding reliance on batteries, the concept sidesteps weight, thermal management, and lifecycle constraints that have limited the feasibility of hybrid systems for larger commercial aircraft.
The ground tests were conducted at GE’s Peebles Test Operation and exceeded performance benchmarks set by NASA. Those benchmarks were defined to reflect engine capabilities that could deliver meaningful fuel cost reductions for U.S. airline operations while still meeting the power demands of future single-aisle aircraft.
RISE program
The power extraction demonstrator is part of GE Aerospace’s broader technology development roadmap under the CFM International RISE program, which is exploring multiple next-generation propulsion concepts, including open-fan architectures, compact cores, and hybrid electric systems. Technologies under RISE are intended to mature through ground and flight testing later in the decade, feeding into potential future commercial engine programs rather than near-term products.
GE Aerospace has been testing hybrid electric propulsion concepts for more than a decade, including earlier ground and altitude tests of megawatt-class systems. The latest demonstration extends that work to turbofan integration at a scale relevant to narrowbody aircraft, addressing a key barrier between experimental systems and practical airline applications.
While the technology is still at a research stage, the test provides data on how electrical and mechanical systems can be coordinated within a conventional turbofan. That integration is widely viewed as a prerequisite for more electric aircraft architectures aimed at reducing fuel burn and emissions in the next generation of single-aisle fleets.
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