in front of the rotor blades 5 the first subset of tensioning ropes 7 by contrast is located behind the rotor blades 5 the second subset of tensioning ropes 8 are also adjusted in terms of force application in such a manner as to hold the guide device 6 concentric in relation to the rotor 1 besides the forces acting along the axis of the rotor 1 which are induced by the first subset of tensioning ropes 7 and the second subset of tensioning ropes 8 compensate each other fig2 provides a schematic view of five of these tensioning ropes all around its circumference the guide device 6 provides fastening points 10 preferentially spaced equally for the tensioning ropes 7 8 first securing anchors 11 are provided on the nacelle 2 the first securing anchors 11 are connected with the fastening points 10 by the tensioning ropes 7 second securing anchors 12 are arranged on the plate 9 these are connected with the fastening points 10 on the guide device 6 by the second subset of tensioning ropes 8 plate 9 is fastened in such a manner that it will not follow the rotation of rotor 1 this can be guaranteed firstly by pivot mounting it to the rotor 1 secondly it is possible to conceive the rotor 1 as a hollow tube that contains a non rotating core in this case the plate 9 is attached to the non rotating core located on the distal end of the rotor blades 5 is a trolley body 13 in a preferred embodiment the trolley body 13 is enclosed by the hollow rail fig3 provides.