Rotor blade and method for producing same

1. A rotor blade for a wind energy system with at least one flange running in a longitudinal direction (L) of the rotor blade, characterized in that a width (B) of the flange decreases along the longitudinal direction (L), and that the at least one flange has superposed and differently wide positioning strips with different lengths in the longitudinal direction (L), and that the positioning strips are designed narrower in their width the further they are removed in the longitudinal direction (L) from the rotor blade root.

2. The rotor blade according to claim 1 , characterized in that the width of the at least one flange gradually decreases in the longitudinal direction.

3. The rotor blade according to claim 1 , characterized in that outside positioning strips of the at least one flange are shorter than positioning strips of the flange which are arranged inside the outside positioning strips.

4. The rotor blade according to claim 1 , characterized in that each positioning strip adjacent on the inside of an outside positioning strip is longer than the outside positioning strip.

5. The rotor blade according to claim 1 , characterized in that positioning strips arranged on the inside of an outside positioning strip of the at least one flange are narrower than the outside positioning strip of the flange.

6. The rotor blade according to claim 5 , characterized in that positioning strips arranged on the inside of an outside positioning strip of the at least one flange are narrower sectionally or narrower substantially over their entire extent in the longitudinal direction (L) than the outside positioning strip of the flange.

7. The rotor blade according to claim 1 , characterized in that a transversely running end of a positioning strip ended in the longitudinal direction forms a transverse increment into which a smoothing, transversely running closure is formed.

8. The rotor blade according to claim 7 , characterized in that the transversely running end of a positioning strip ended in the longitudinal direction forms a transverse increment into which a smoothing, transversely running, wedge-shaped closure is formed that corresponds to the height and/or width of the ended positioning strip.

9. The rotor blade according to claim 1 , characterized in that a longitudinally running end of a positioning strip ended in a transverse direction forms a longitudinal increment into which a smoothing closure running in the longitudinal direction (L) and is formed.

10. The rotor blade according to claim 9 , characterized in that a longitudinally running end of a positioning strip ended in a transverse direction forms a longitudinal increment into which a smoothing closure running in the longitudinal direction (L) and formed like a wedge is formed that corresponds to the height and/or width of the ended positioning strip.

11. The rotor blade according to claim 9 , characterized in that the closure running in the longitudinal direction (L) and/or the transversely running closure comprises balsa wood.

12. The rotor blade according to claim 1 , characterized in that each positioning strip adjacent on the outside to an inside positioning strip is wider and shorter than the inside positioning strip.

13. A process for producing a rotor blade according to claim 1 , in which at least one flange with its width (B) decreasing in the longitudinal direction (L) is applied onto a rotor blade inner wall, characterized in that the positioning strips with different widths (B) and/or different lengths are superposed over each other and selected in such a manner that the longer the positioning strips extend in the longitudinal direction (L) the narrower the positioning strips become.

14. The process according to claim 13 , characterized in that the ends of the positioning strips ending in the longitudinal direction form transverse increments onto which transversely running closures are attached and that are smoothed, and/or that ends of the positioning strips ended in the transverse direction form longitudinal increments on which smooth closures running in the longitudinal direction (L) are attached.

15. The process according to claim 14 , characterized in that smooth closures running in the longitudinal direction (L) are laminated.

16. The process according to claim 14 , characterized in that smooth closures are balsa wood wedges.

17. The process according to claim 13 , characterized in that the inside positioning strips are selected to be narrower than adjacent outside positioning strips and that the decrease in width is determined in such a manner that a substantially level and straight inside flange surface is formed, adaptive to a curvature of the rotor blade inner wall.