Collins Aerospace has commenced initial testing of electric motor drive systems for the European Union’s Clean Aviation SWITCH project, marking an important step forward in the development of hybrid-electric propulsion. The work represents a key step towards demonstrating the technology on a full-scale Pratt & Whitney GTF™ engine.
Testing is being carried out at Collins’ advanced electric power systems facility, known as “The Grid”, in Rockford, Illinois. The trials focus on the integrated hybrid-electric powertrain subsystem, including motor generators, controllers and power distribution systems. These components are central to validating how hybrid-electric technology can improve engine performance and efficiency across different phases of flight.
The SWITCH project is specifically aimed at optimising fuel efficiency for future short- and medium-haul aircraft by incorporating more electric systems into propulsion architectures. Among the key technologies under evaluation are two megawatt-class motor generators, which will be integrated into a hybrid-electric Pratt & Whitney GTF engine demonstrator during the next phase of testing.
The programme reflects a highly collaborative European effort, bringing together major aerospace stakeholders including Airbus, MTU Aero Engines, GKN Aerospace, Pratt & Whitney and Collins Aerospace. Critical components have been developed across several specialised facilities in Europe, underlining the cross-border nature of the initiative and its strategic importance to the region’s aviation sector.
Overall, the SWITCH project highlights accelerating industry momentum behind hybrid-electric propulsion as a viable pathway towards more sustainable aviation. By advancing technologies that can significantly improve fuel efficiency and reduce emissions, the programme is helping to lay the groundwork for the next generation of cleaner, more efficient commercial aircraft.
