NOVELTY - The system (26) has a portable load device (30) including a motor to reel in a tow cable (50). A tower support (34) is movably coupled to a tower (12) of a wind turbine (10) between position adjacent to a base of the tower and operative position adjacent to the blade and the cable from the load device. A blade attachment device (36) is coupled to the blade and the cable. The load device is activated to induce tension in the cable when the attachment device is coupled to the blade and the support is in operative position such that force is imposed on the blade in direction toward the tower.    USE - Blade loading system for an assembled wind turbine i.e. horizontal-axis wind turbine, used as a prime mover for an electromechanical system and to produce electrical energy and convert kinetic energy into electrical power for a service vehicle e.g. lorry and van, on-shore applications and off-shore applications.    ADVANTAGE - The system eliminates a need for an external crane to perform task so as to significantly reduce cost of maintenance project. The system allows the wind turbine to be located in remote areas, which can be easily reached with a generally large mobile crane. The system is relatively easy to use, and requires only two workers to carry out assembly, implementation and disassembly of the system, so that assembly steps can be performed adjacent to the base of the tower on a ground or on a platform, which is readily accessible by maintenance personnel. The system can be used to reduce movement of the blade during repair, thus allowing maintenance workers to more easily conduct repair and increase likelihood that repair is successful.    DETAILED DESCRIPTION - The motor is selected from a group consisting of an electric motor, a hydraulic motor, a pneumatic motor, an electro-mechanical motor and a hydraulic piston. An INDEPENDENT CLAIM is also included for a method for applying force to a wind turbine blade on an assembled wind turbine.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a wind turbine with a blade loading system.    Wind turbine (10)    Tower (12)    Blade loading system (26)    Portable load device (30)    Tower support (34)    Blade attachment device (36)    Tow cables (50, 56)