Propeller blade or airfoil with wound composite root

A method for manufacturing a turboprop engine blade or propeller airfoil made of composite material comprising a fiber reinforcement densified by a matrix, the method comprising:

• producing by three-dimensional weaving of a fiber blank made as a single piece, the fiber blank having a flat shape extending along a longitudinal direction and a transverse direction respectively corresponding to the span direction and to the chord direction of the blade or propeller airfoil to be manufactured, the fiber blank comprising a root part and an aerodynamic profile part extending along the longitudinal direction from its the root part and along the transverse direction between a leading edge portion and a trailing edge portion,
• shaping the fiber blank to obtain a fiber preform as a single piece having said aerodynamic profile part forming an aerodynamic profile preform and said root part forming a root preform, and
• densifying the fiber preform by a matrix to obtain the blade or propeller airfoil made of composite material having the fiber reinforcement consisting of the fiber preform and densified by the matrix, and forming a single piece with an integrated root, wherein the root part of the fiber blank comprises a non-interlinking extending along a plane parallel to the surface of the fiber blank over the whole root part, said non-interlinking separating the root part into two woven portions and wherein the shaping of the fiber blank comprises the winding of each woven portion around an insertion element in such a way as to form the root preform part.