15 December 2020: EcoPulse demonstrator has recently achieved its latest milestone with the passing of Preliminary Design Review, thereby paving a way towards the first flight scheduled for 2022. This has enabled the validation and freezing of the demonstrator’s baseline configuration, as well as confirming the hybrid distributed propulsion system’s level of safety and compatibility with the aircraft.
Based on a light aircraft platform supplied by Daher, EcoPulse Demonstator was first unveiled at the 2019 Paris Air Show. The commercial application of EcoPulse Demonstator will help in reducing carbon emissions and aid in achieving the air transport sector’s 2050 decarbonisation objective.
Airbus, Safran and Daher have come together with the support of France COTAC civil aviation research council to develop EcoPulse distributed propulsion hybrid aircraft demonstrator. The project is now entering the assembly and integration phase at Daher, with systems supplied by Safran and Airbus.
Daher has adapted its demonstrator aircraft platform to ensure the integration and compatibility of a hybrid system with distributed propulsion at the necessary safety level while carrying out installing components and systems, flight testing, global analysis and airworthiness.
Pascal Laguerre, Daher’s Chief Technology Officer said, “With this demonstrator, Daher intends to develop the key architectural principles for future hybrid aircraft. The project reaffirms our commitment, as a general aviation manufacturer with our Kodiak & TBM product lines, to more efficient and eco-responsible aviation. This is reflected by our company’s active participation in numerous ambitious collaborative research projects aimed at decarbonizing air traffic.”
The Preliminary Design Review’s successful completion has enabled Daher to begin the demonstrator’s assembly phase at its Tarbes, France site, where the initial components were designed and delivered. The start of final assembly is planned for late 2021, with the first flight scheduled to take place in 2022.
Safran is responsible for EcoPulse’s distributed hybrid-electric propulsion system, has finalized the technical configuration of its six electric thrusters. They will be fitted with 50 kW ENGINeUS electric motors with integrated electronics and patented air cooling, as well as propellers supplied by DUC Hélices. The Safran ENGINeUS motor will be submitted for EASA certification the same type as granted for a turboshaft engine.
Safran has also validated the installation interfaces for the propulsion system’s other components, along with the power management system, the turbogenerator and the high-voltage wiring that will supply electrical power to the thrusters. The turbogenerator, which performed its first test bench runs in 2018, will soon undergo additional tests.
“EcoPulse is an ambitious project, and designing hybrid propulsion on this new aircraft architecture is a key skill that Safran is proud to master,” said Stéphane Cueille, Senior Executive Vice President and Chief Technology Officer, Research & Technology and Innovation at Safran. “Mobility needs are changing, and the Group is responding to them by offering advanced and sustainable technologies that have taken shape with this important milestone reached today.”
The next step for Safran will be its delivery of an initial electric thruster to Airbus for wind tunnel and endurance testing, in preparation for qualification of the thrusters’ use on EcoPulse’s first flight.
Airbus is currently involved in the demonstrator aircraft’s aerodynamic modelling to schedule the start of wind tunnel testing for propeller/nacelle assembly during the first quarter of 2021. The electric engine, supplied by Safran, will be tested as well. The results of these tests will enable the identification of the propeller’s performance characteristics when associated with an electric engine, and validate the engine cooling process.
“The EcoPulse demonstrator program, initiated by CORAC with the support of the French DGAC civil aviation agency, is an important step in our ambition to decarbonize the aeronautical industry. It will allow us to study how distributed hybrid propulsion could be integrated into the aircraft of tomorrow and significantly reduce their environmental impact,” added Jean-Brice Dumont, Executive Vice President Engineering, Airbus.
In addition to these wind tunnel tests, Airbus also is planning to simulate the nacelle’s aerodynamic behavior.
