Testing the hybrid future The next generation of helicopters will benefit from disruptive technologies that are currently being developed in Airbus laboratories. The engine back-up system (EBS) is one of these innovations, which will increase performance and safety, especially for single-engine aircraft. Article: Alexandre Marchand INNOVATION What is it? What is it? The EBS combines a 100 Kw electric motor connected to the main gearbox, which can provide electrical power for 30 seconds in the event of an engine failure. By giving the pilot extra time to react and maintain rotor speed, the engine back-up system contributes to a safer and smoother autorotation manoeuvre to the ground. An ongoing test campaign, conducted last September and October on board the Flightlab, has enabled the safety and performance benefits of such a device to be accurately assessed. The test programme included the simulation of engine failure during different phases of flight, with all associated constraints, including those during take-off and landing.