The B75 blade used in the new rotor is characterized by high stability and low weight. Special aerodynamic profiles deliver optimal performance at a wide range of wind speeds. For the manufacturing of the B75 blade, Siemens uses the patented IntegralBlade process, which permits rotor blades to be produced from a single casting without adhesive joints. An IntegralBlade is up to 20 percent lighter than blades manufactured using traditional methods. Overall, combining an intelligent rotor blade profile with low weight helps lower the cost of wind energy.