Rotor for a contrarotating turbine of a turbine engine

A rotor for a contrarotating turbine of a turbine engine, comprising:

• a drum capable of being rotated about a longitudinal axis and a blading mounted radially inside the drum, the drum comprising a first inner hook delimiting a first open housing, the first open housing having an outer wall and an inner wall, the blading comprising at least one blade and an outer platform provided with a first spoiler placed inside said first open housing;
• and
• at least one foil fixed on the first spoiler, said foil comprising an elastic inner wing and an outer wing connected to one another via a core, said outer wing being arranged radially between the first spoiler and said outer wall, said inner wing having a first support with said inner wall and a second support with the first spoiler, said inner wing being arranged in the first housing so as to exert a force on the first spoiler at the level of said second support so as to press said first spoiler against said outer wall via said outer wing,
• wherein the entirety of said outer wing is straight and said inner wing comprises a first concave section connected directly to said core and a second convex section connected to said first concave section via an inflection point, said first and second supports being arranged respectively at the level of said first concave section and of said second convex section.