Profiles for aerial propeller blade careened

Profile 1 blade shrouded aerial propeller of which the relative thickness is included between 9% and 15%. According to the invention, the curvature of said profile having a maximum value at the edge of attack a thereof, the suction line 2 comprises three successive portions 2.1, 2.2 and 2.3 such that: - in the first portion 2.1, the curvature decreases rapidly from said maximum value at the leading edge to a value close 20 at a first point B which the reduced abscissa is close to 1%; - in the second portion 2.2, the curvature decreases more slowly said value close to 20 said first point B to a value close to 1 at a second point D whose abscissa reduced is around 25%; and - in the third portion 2.3, the curvature is less than 1 between said second point D and said trailing edge C .