Joint Blade Rotor a/S

the joint blade rotor system is a patented blade design for wind turbines, which utilizes the powers of wind with much higher efficiency than traditional blades. the blade is designed as a twin-blade with stability, lighter construction, and aerodynamic benefits as result. each blade consists of a set of two smaller blades. the theory behind the concept is, that two smaller blades running parallel utilizes the power in the wind better. at the same time, the joint 2/3 out from root of the blade makes it more stable and in larger scale weight can be reduced. the concept is theoretically defined, and the performance is calculated based on aerodynamic models. small blade models in wind tunnels have been tested and both the theoretical calculations and results from model tests show the improved performance. the blade can be designed for stall- as well as pitch-regulated turbines.