Raytheon Technologies tests regional hybrid-electric plane’s engine

Raytheon Technologies successfully completed the first engine run of the company's regional hybrid-electric flight demonstrator, marking a key milestone toward flight testing, targeted to begin in 2024.

Raytheon Technologies’ regional hybrid-electric flight demonstrator combines a highly efficient Pratt & Whitney engine, with a 1MW electric motor, developed by Collins Aerospace, as part of an integrated propulsion system.

The propulsion system's initial run took place at Pratt & Whitney's innovation facility in Longueuil, Quebec, and performed as expected. The system fully integrates a 1MW electric motor developed by Collins Aerospace with a highly efficient Pratt & Whitney fuel-burning engine, specially adapted for hybrid-electric operation. This powerplant technology will enable more efficient engine performance during the different phases of flight, such as take-off, climb and cruise, reducing fuel burn and CO₂ emissions by up to 30% compared to today's most advanced regional turboprop aircraft.

"Hybrid-electric propulsion technology offers significant potential to optimize efficiency across a range of different aircraft applications, helping our industry meet its ambitious goal for achieving net zero CO₂ emissions," said Jean Thomassin, executive director new products and services, Pratt & Whitney Canada. "With our ground test program now well underway, planned flight testing will enable us to accelerate the demonstration of this next generation sustainable propulsion technology as we continue to expand our collaboration within Canada's aerospace ecosystem and beyond."

Flight Test Centre of Excellence (Cert Center Canada - 3C), will modify and operate the De Havilland Canada Dash 8-100 aircraft, serving as the platform for future flight demonstrations.

"We are honored that Raytheon Technologies has chosen our Design Approval Organization to lead the flight test program for this historic demonstrator project," said John Maris, 3C president and chief test pilot for the project. "3C has assembled a trusted Quebec team that includes Chrono Aviation, WAAS Aerospace, and Elisen & associés to integrate the hybrid-electric powertrain, battery system, and high voltage electrical harness into 3C's Dash 8 research aircraft. I am confident that 3C's extensive flight test experience and historical relationship with Transport Canada will complement Raytheon Technologies' outstanding team to safely demonstrate this important technological advance."

Since Raytheon Technologies launched the demonstrator project via its Pratt & Whitney Canada and Collins Aerospace businesses in July 2021, supported by the Governments of Canada and Quebec, numerous organizations in Canada and around the world have joined the initiative.

H55 S.A., recently the subject of a minority investment by Raytheon Technologies' venture capital arm,RTX Ventures, will supply battery systems. The development of battery component designs and associated electrical control systems will also be supported by the National Research Council of Canada and the Innovative Vehicle Institute. Ricardo PLC is also supporting the project with component design, system integration, and testing. De Havilland Canada is supporting integration of the propulsion system on the experimental aircraft.

Raytheon Technologies is leading the development of hybrid-electric propulsion technologies across multiple demonstrator programs, including STEP-Tech and SWITCH, spanning a wide range of potential future aircraft applications. Alongside continually advancing the efficiency of aircraft propulsion systems, the company is also developing technologies to support greater use of cleaner, alternative fuels, including sustainable aviation fuels (SAFs) and hydrogen, each of which will benefit from the increased efficiencies enabled by hybrid-electric propulsion technology.