The FLEXHAT programme aims at the development of components for the next generation of wind turbines. The objective of the program is diminishing internal peak loads, by employing the dynamics of the rotor instead of withstanding them. Flexibility is introduced in the four main degrees of freedom of the rotor, resulting in a variable speed conversion system with soft characteristics, rotor control by means of passive activation of the tip in combination withvariable speed, an elastomeric teeter with elastomeric teeter limiters (bumpers), and a flexbeam which is moderately flexible in flapwise direction and stiff in torsional direction. All components are or will be tested on a 25 m research turbine, located at ECN Petten. The test of the first version of passive tip control combined with the variable speed conversion system has been finished successfully. The rotor with the teeter, the teeter bumpers, and the flexbeam is operational in autumn 1991. Finally, a test and demonstration of an integrated approach will be performed on a redesigned existing 250 kW turbine.