The EADS Innovation Works concept study of a Diesel-electric hybrid propulsion system is part of the research to make helicopters more environmentally friendly. Up to 50% reduction in exhaust emissions are possible by using innovative combustion engines in a hybrid diesel-electric propulsion system with electrical main rotor and tail rotor drives. Electrical rotor drives of the main and tail rotors allow for flexible, power-optimized rotor speed settings while further reducing fuel consumption. Tilting of the main rotor during the cruise phase enables the hybrid helicopter to retain optimum aerodynamics during cruise, reducing the power demand and the fuel consumption. Takeoffs and landings are possible with electrical power only, resulting in lower noise levels and improved flight safety.
© EADS 2013