Swiss Electric-Propulsion Company’s EASA-Validated Battery System Helping Power Hybrid-Electric Demonstrator H55 has announced continued progress developing the 200 kWh energy storage system (ESS) for the RTX Hybrid-Electric Flight Demonstrator, since the project achieved the significant milestone of its first full-power system test conducted in June 2025. The demonstrator, led by RTX’s Pratt & Whitney Canada and Collins Aerospace, aims to demonstrate up to 30 percent improvement in fuel efficiency for regional aircraft through a hybrid-electric propulsion architecture combining an advanced thermal engine, a one-megawatt electric motor, and H55’s battery system.
