A winding core for producing blade ends for rotor blades of wind power installations, the winding core comprising:
- a first section having a first end for forming a hub connection geometry for connecting the blade end to a rotor hub;
- and
- a second section having a second end for forming an outer blade connection geometry for connecting the blade end to an outer blade,
- wherein a portion or all of the first section is removable to vary at least one of:
- a longitudinal length of the winding core, a diameter of the first section, or a shape of the first section, such that the winding core is configured to produce different shaped blade ends for wind power installations having different rotor diameters.