with a rotor diameter of 90 meters, the nordex n90 is especially suitable for inland locations. the nordex n90 is a variable-speed wind turbine with a rated capacity of 2300 kw. the machine and the blades are designed for......with a rotor diameter of 90 meters, the nordex n90 is especially suitable for inland locations. the nordex n90 is a variable-speed wind turbine with a rated capacity of 2300 kw. the machine and the blades are designed for gl 2.the output is limited by adjusting individual blades. the reduced speed of the rotor limits the speed at the blade tips. at locations with lower average wind speeds the n90 is able to produce 25 per cent higher annual yields than comparable systems.