**3.2 Airbus, Rolls-Royce, and Siemens**

In 2017, a 100-seat regional jet with a hybrid electric drive for a turbine was developed by Siemens, Airbus, and Rolls Royce. The E-Fan X hybrid-electric innovation demonstrator was temporarily flown on a BAe 146 flying testbed, with one of the aircraft's four gas turbine motors supplanted by a 2-megawatt electric engine. Arrangements were made to replace a second gas turbine with an electric engine once framework development had been demonstrated.

The compact 2.5 MW (3400 hp) generator was run in 2019 and first flight was scheduled for 2021. The AE2100 turboprop was from a Saab 2000 feeding the battery pack and a Siemens SP2000 electric motor (with a 10 kW/kg power-to-weight ratio) replacing one Honeywell LF507 engine with a Rolls-Royce AE 3007 fan through a 3000 volts AC/DC distribution. However, the program was canceled in 2020 due to the COVID-19 pandemic.

*Electrification for Aero-Engines: A Case Study of Modularization in New Product… DOI: http://dx.doi.org/10.5772/intechopen.109006*
