GE Aerospace has completed the aviation industry’s first hybrid-electric flight above 30,000 feet, marking a major milestone in the development of next-generation aircraft propulsion technologies.
The record-setting demonstration was carried out in partnership with NASA, BETA Technologies, and Boeing using a modified Saab 340B aircraft equipped with a hybrid-electric propulsion system. During the test campaign, the aircraft reached typical commercial cruising altitude while also completing its longest hybrid-electric flight to date, lasting more than two hours.
The demonstration was conducted under NASA’s Electrified Powertrain Flight Demonstration (EPFD) programme and utilised GE Aerospace’s fully integrated megawatt-class, multi-kilovolt hybrid-electric propulsion system.
H. Lawrence Culp Jr., Chairman and CEO of GE Aerospace, described the achievement as a landmark moment for the aviation industry, saying it demonstrates how collaboration between industry partners is accelerating the development of hybrid-electric technologies capable of improving aircraft efficiency, durability and operational range.
The test aircraft featured a specially modified propulsion system housed in an inverted nacelle to improve cooling and ventilation. The system integrated GE Aerospace-developed electric motor-generators, power converters, inverters, controllers, gearboxes, propellers, heat exchangers and a CT7 engine. Batteries were supplied by BAE Systems, while Boeing subsidiary Aurora Flight Sciences designed and integrated the nacelle.
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During the flight tests, the hybrid-electric propulsion system successfully powered the aircraft’s propeller while simultaneously generating electricity to recharge the onboard batteries. Engineers also validated the system’s performance under demanding high-altitude conditions, addressing challenges such as thermal management, reduced atmospheric pressure and high-voltage power distribution.
Kyle Clark, Founder and CEO of BETA Technologies, said the demonstration proved the hybrid-electric system’s ability to improve climb performance and high-altitude operations while serving as a valuable test platform for future aircraft technologies.
Mohamed Ali, President and CEO of GE Aerospace Commercial Engines & Services, said the successful flight validates the readiness of hybrid-electric propulsion systems for next-generation aircraft and demonstrates the advanced capabilities these technologies can deliver for future commercial aviation.
Beyond its technological significance, the programme also has important implications for the future MRO industry. Hybrid-electric propulsion systems introduce new maintenance requirements involving high-voltage electrical systems, power electronics, battery management, thermal control systems and integrated digital diagnostics. As these technologies move closer to commercial service, MRO providers will need to develop new capabilities, specialised tooling and workforce skills to support the next generation of electrified aircraft.
GE Aerospace noted that technologies developed through the NASA programme are also supporting the CFM International RISE engine demonstrator, which aims to deliver more than 20% lower fuel consumption than current commercial aircraft engines. The latest flight marks another step towards the aviation industry’s long-term goal of more sustainable and highly efficient aircraft propulsion systems.
