Fiber preform for a hollow turbine engine vane

A fiber preform for a hollow turbine engine vane, the preform comprising:

• a main fiber structure obtained by three-dimensional weaving and including a main part extending in a radial direction;
• and
• a second fiber structure obtained by weaving and configured to be fitted to an edge of the main fiber structure,
• wherein the main part presents a loop and includes, in order around the loop:
• a first link strip,
• a first main longitudinal portion suitable for forming essentially a pressure side wall of an airfoil,
• a U-turn bend portion suitable for forming essentially a leading edge or a trailing edge of the airfoil,
• a second main longitudinal portion facing the first main longitudinal portion and suitable for forming essentially a suction side wall of the airfoil, and
• a second link strip,
• wherein the first and second link strips are secured to each other and form a link portion of the main fiber structure,
• wherein the main longitudinal portions are spaced apart so as to form a gap between said main longitudinal portions suitable for forming a hollow in the airfoil, and
• wherein at least one of the fiber structures comprises a radial portion extending from a bottom edge or a top edge of the first main longitudinal portion or the second main longitudinal portion of the main part, the radial portion being suitable for forming a platform or a fastener flange.