Open Rotor engine moves a step closer to reality

The Open Rotor type aircraft engine, a futuristic concept with counter-rotating high-speed propellers, underwent a new series of tests in mid-July in the large S1 wind tunnel operated by French aerospace research agency Onera in Modane, Savoy region. These tests used a 1/5 scale model that enabled engineers to check out several types of propeller pairs. Carried out within the scope of the European research program Clean Sky (a partnership between the European Commission and the aviation industry), this latest series of tests focused on the engine's low-speed aerodynamic and aeroacoustic performance.
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