Patent ID: 8888464

Claim:
A method of fabricating a reinforcing coating for a rotor blade by using dry or pre-impregnated reinforcing fibers in the form of strands and laying said strands in layers on the rotor blade, the method comprising the steps of: providing a rotor blade having a pressure surface, a suction surface, a blade span, and a longitudinal axis oriented along the span; using a first layer of longitudinal strands and a second layer of longitudinal strands, locating an origin portion of the rotor blade to constitute the origin of strand laying, determining placement directions for laying strands in each of the first and second layers using an angular orientation for the strands of each layer of ±45° relative to the longitudinal axis, determining an order for laying each of the strands in each of the placement directions in order to define at least one crossing line of the strands, the crossing line comprising a boundary such that on a first side of the crossing line the strands in the first layer are disposed above the strands in the second layer and on a second side of the crossing line the strands in the second layer are disposed above the strands in the first layer, determining a number of laying operations for the first layer and the second layer using a predefined number of strands for each laying operation and a pitch for the strands laid during each laying operation, and then superposing or interlacing the strands of two successive laying operations on the rotor blade in order to reconstitute the first and second layers in the form of a pattern with a single crossing line along the pressure surface or the suction surface, the crossing line being a jagged line defined by corners of alternating strands of the first and second layers.