MONTREAL - Pratt & Whitney Canada's parent company RTX has unveiled additional details on a hybrid-electric version of its PW127 turboprop engine under a €101 million ($117 million) EU Clean Aviation initiative called PHARES. Launched in early 2026, the program aims to demonstrate a 20% reduction in fuel burn against a 2020 baseline.
The engine, based on an advanced derivative of the 2,750-shaft-horsepower PW127 that powers ATR 42 and 72-series aircraft, will incorporate aerodynamic improvements and new materials alongside a 250-kilowatt Collins Aerospace electric motor mounted on the propeller gearbox. The electric motor will supply roughly 12% of the demonstrator engine's overall power requirement, though Collins Aerospace principal technical fellow Todd Spierling cautioned that figure could shift as the program matures.
P&WC has not yet determined how the projected fuel savings will be divided between improvements to the thermal engine and the hybrid system. A new propeller being developed by Collins subsidiary Ratier Figeac will also contribute to efficiency gains, and the entire package, including a thermal management system, is designed to fit within the existing nacelle structure.
Flight testing of the hybridized engine is slated for 2029 under the ATR-led DEMETRA project, with results expected to inform ATR's decision on the scope of its proposed Evo aircraft upgrade. If ATR proceeds, the Evo would enter service around 2035.