Safran Helicopter Engines announced at the Paris Air Show this morning (20 June 2023) that it has completed the validation of its Eco Mode hybrid propulsion system for twin-engine helicopters. This comes ahead of the concept’s flight testing on an Airbus Racer high-speed helicopter.
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. Eco mode was developed as part of a research project funded by the French Direction Générale de l’Aviation Civile (DGAC).
The Racer is fitted with two Aneto-1A engines, each rated at 2,500 shaft horsepower, aimed at delivering a long-range cruise speed of up to 400Kph (216kts). For Eco Mode, one of the engines is fitted with a 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.
