NOVELTY - Manufacturing a wind turbine rotor blade involves predicting anticipated primary load paths within the rotor blade; dispensing fibers (40) of reinforcing material onto a mold (20), where an orientation pattern of the fibers is selected in dependence on the predicting step; dispensing resin (60) into the mold; and curing the rotor blade in the mold. The fiber dispensing is undertaken by a chopper gun (30). The resin dispensing is undertaken by a spray forming nozzle (50). A coating material is applied to a surface of the mold prior to the dispensing steps.    USE - For manufacturing a wind turbine rotor blade used in wind turbine installation (claimed).    ADVANTAGE - The orientation of the fibers is optimized, and the weight of the components is minimized. The careful selection of fiber orientation enhances the strength of the blade without increasing the weight of the blade. By dispensing fibers directly into the mold in an orientated fashion, reflecting the anticipated loading of the finished component in use, an improved rotor blade is manufactured. The method can be automated which, in turn, improves the accuracy, reliability and speed of manufacture. The blade itself comprises an optimal fiber to resin ratio which enhances the structural integrity of the blade without increasing the weight. As fibers are placed directly in the mold, kinks and folds of the fibers are avoided such that imperfections or flaws in the blade are avoided. Use of a fine spray of the resin combined with automated delivery of short fibers enables the quantities of fiber and resin to be controlled in an accurate manner. The volume ratio of fiber to resin can thus be controlled and the weight of the finished component is minimized. The provision of orientated fibers is achieved within a tolerance of approximately not greater than 5 degrees . This orientation, together with the control of the fiber volume to resin volume ratio permits the strength to weight ratio to be optimized. Very high material deposition rates are achieved using the method such that large components e.g. wind turbine rotor blades or their parts are manufactured rapidly. Hence the method is appropriate for complex geometries and can be solely used for the complex parts of a shell or can be used for the entire shell lay-up. The method achieves high level of automation that leads to a corresponding improvement in accuracy and predictability of manufacture and hence quality of the final product. The automation enables complete control of the orientation of the fibers such that optimized structural design of the component is achieved.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a wind turbine rotor blade comprising fibers of reinforcing material embedded in resin, where the lengths of the fibers is 5-200 mm and are orientated in dependence on an anticipated structural loading pattern of the rotor blade; and    (2) a wind turbine installation comprising: a tower; a hub mounted atop the tower; and the rotor blade, connected to the hub.    DESCRIPTION OF DRAWING(S) - The figure shows schematic view illustrating a manufacturing method for forming a rotor blade.    Mold (20)    Dispensing tool/chopper gun (30)    Short fibers (40)    Nozzle (50)    Hot melt resin (60)