COMPOSITE MATERIAL PROPELLER BLADE AND PROCESS THEREFOR

摘要

A composite material propeller blade comprises a shell having an aerodynamic profile made up by at least one layer of fiber fabrics with high mechanical resistance which has been rigidified by a polymerized synthetic resin. A filling body is made of a cellular or foam synthetic material in the shell, and the spar whose longitudinal axis is substantially parallel to that of the blade is constituted by a single elongated leaf of rovings of fibers with high mechanical resistance agglomerated by a polymerized synthetic resine such that the major part of the leaf is fixed in the shell and of which an end part of the leaf emerges from the shell and forms a twistable and flexible root part for which the spar is adapted to be connected to a hub. A metal leading edge cover is integrated in the shell. The preformed filling body comprises a cut-out which extends over the whole length of the body and opens in the face of the body turned towards the upper surface part of the shell and the section thereof corresponds substantially to that of the spar in the part which is fixed to the shell so that the spar is disposed in the housing defined by the cut-out in the filling body and the upper surface part opposite the shell.