Rotor blade wind turbine with a spark gap

Rotor blade wind turbine (10) with a receiver lightning protection (24), a first power line and a device for potential equalizing having a first electrode (44) which is connected to the receiver lightning protection (24), and a second electrode (42), which is connected to the first power line, wherein between the two electrodes (42, 44) comprising a spark gap (40) is arranged, characterized in that the sides directed towards each other of the two electrodes (42, 44) form a flow channel, which is arranged so that it is crossed by the ambient air flowing during operation of the rotor blade wind turbine (10).