The current research project, which is funded by the German Federal Ministry of Education and Research (BMBF) and which states the basis for this publication, investigates the drag reducing impact of in flow direction oriented microscopic surface structures focused on airfoils of modern wind turbines´ application. These structures, also known as riblets, cause a viscous drag reduction in the turbulent boundary layer. Riblets will be adjusted continuously to the local flow conditions to harness the whole drag reducing effect. The major goal of the project is to demonstrate the superiority of continuously adapted riblets for the application of modern wind turbines. The exhibit shows a Laser-profiled section of a rotor.