DLR, Airbus Test Quieter Rotor

German aerospace center DLR and Airbus Helicopters Germany have achieved a 30% reduction in noise in wind tunnel tests of a modern five-blade helicopter rotor with active rotor control. Tests of the full-scale rotor with individual blade control were conducted in the large low-speed facility at DNW German-Dutch Wind Tunnels in Marknesse, the Netherlands, under the German-funded SKAT (scalability and risk minimization of technology) research project. SKAT uses the META multiple-swashplate …

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