at a non optimum rotary speed and the non optimum rotary speed is higher than the optimum rotary speed application_number US 201214007927 A description fig1 shows a horizontal axis wind power installation as is known in principle from the state of the art according to the invention that horizontal axis wind power installation in fig1 is equipped with a method namely an operational management method according to the present invention generally described and as shown by fig1 the wind power installation includes a pylon and a pod located on the pylon a hub spinner is rotatably coupled to the pod and at least one rotor blade is coupled to the hub spinner fig2 diagrammatically shows two operating characteristics namely two rotary speed power characteristics that diagram shows an optimum operating characteristic 1 as a solid line and a non optimum operating characteristic 2 as a broken line the two operating characteristics 1 and 2 represent only a diagrammatic configuration which can deviate from the real configuration in particular the real configuration can deviate from the simplified straight line representation that representation is intended substantially to illustrate the relationship between the optimum operating characteristic 1 and the non optimum operating characteristic 2 moreover that also applies to the diagrams in fig3 which can also be greatly simplified in relation to a real configuration it can now be.