Safran Helicopter Engines has validated its Eco Mode hybrid propulsion system during ground tests in Bordes, France, in preparation for upcoming flight tests on the Airbus Racer high-speed helicopter demonstrator. The hybrid electric propulsion mode was tested for the first time in a configuration similar to the one that will be used on the Racer.
Designed for twin-engine helicopters, Eco Mode places one engine on standby during cruise, while the other operates at a more energy-efficient power setting. This mode reduces fuel consumption and CO2 emissions by about 15% and increases the helicopter’s range. The engine is automatically restored to full power by an innovative electric fast restart system, within just a few seconds, when needed for landing or during an emergency.
The Racer’s Eco Mode uses an Aneto-1A engine and the fast restart electrical system developed jointly with Aquitaine Electronique (AECE Group) and Safran Cabin (Ventilation Systems). This system combines an electronic engine control with a high-power-density electric motor, mechanically connected to the engine’s high pressure section.
Eco Mode was developed as part of a research project funded by the French civil aviation authority (DGAC). The twin Aneto-1A engines, each rated at 2,500 shaft horsepower, will play a key role in the Racer’s performance, particularly its ability to reach and maintain a long-range cruising speed of up to 400 km/h.
