Method and a device for mounting of wind turbine blades

摘要

A method for mounting a wind turbine blade (3) to a wind turbine hub (1) by use of a crane boom (5) is provided. The orientation of the blade (3) is kept substantially horizontal when the blade (3) is lifted off the ground and mounted to the rotor hub (1). Control wires (13) which connect the blade (3) via the crane boom (5) to a winch arrangement (11) are used for keeping the blade (3) orientation substantially horizontal in addition to at least one bearing wire (15) for bearing the blade weight.