Abstract: There is provided a wind turbine rotor blade comprising a rotor blade casing, and a lightning protection system having at least one lightning protection cable and a lighting protection cable holder. The lighting protection cable holder is fixed in or to the inside of the rotor blade casing. The lighting protection conductor holder has a first part and a second part. The first part is fixed to an inside of the rotor blade casing and has a receiving portion for receiving the lighting protection cable. The second part is in the form of a cover or covering means and is placed over the receiving portion. The first and second parts each have a radar-absorbing core or a radar-absorbing layer and an electrically insulating material which surrounds the radar-absorbing core or the radar-absorbing layer.

Abstract: A wind turbine rotor blade having a flatback trailing edge. The flatback trailing edge has at least one insert which has a flat outside and a curved inside.

Abstract: There is provided a wind turbine rotor blade comprising a rotor blade casing, and a lightning protection system having at least one lightning protection cable and a lighting protection cable holder. The lighting protection cable holder is fixed in or to the inside of the rotor blade casing. The lighting protection conductor holder has a first part and a second part. The first part is fixed to an inside of the rotor blade casing and has a receiving portion for receiving the lighting protection cable. The second part is in the form of a cover or covering means and is placed over the receiving portion. The first and second parts each have a radar-absorbing core or a radar-absorbing layer and an electrically insulating material which surrounds the radar-absorbing core or the radar-absorbing layer.

Abstract: A method of retrofitting a tooth unit to a trailing edge of a wind turbine rotor blade. A portion of the trailing edge of the rotor blade is cut out and removed. That can be affected when the rotor blade is still disposed on a hub of the wind power installation (that is to say in the mounted state). A tooth retrofitting unit is glued or adhesively fixed on the trailing edge of the wind turbine rotor blade in the cut-out and removed portion. The tooth retrofitting unit has a V-shaped profile and at its first side has two fixing arms and at an opposite side a plurality of teeth. The two fixing arms are adhesively secured to the trailing edge of the rotor blade to mount the tooth retrofitting unit.