Method for improving a blade , the blade extending in a longitudinal direction (X) with a span from a first end to a second end and in a transverse direction (Y) of a leading edge towards a trailing edge , the blade comprising successive cross-sections, each cross-section being defined by an aerodynamic profile , each aerodynamic profile being defined by two half-profiles including an extrados half-profile and an intrados half-profile , the two half-profiles comprising a leading edge portion , an intermediate portion and a terminal portion , the leading edge portion of each half-profile being formed by a portion of an initial leading edge circle , the method comprising a first step of modifying at least one half-profile of each aerodynamic profile , a second step of moving the leading edge for each aerodynamic profile of the blade and a third step of producing the blade in accordance with the modified aerodynamic profiles , the first step being provided with the following sub-steps: - increasing the radius of the initial leading edge circle of the at least one half-profile in order to form at least one new leading edge circle of the at least one half-profile of which a portion constitutes a new leading edge portion of the at least one half-profile , the new leading edge circle being tangential to the initial leading edge circle of the at least one half-profile in the region of the leading edge , and - defining a new intermediate portion of the at least one half-profile replacing the intermediate portion of the at least one half-profile and connecting the new leading edge circle of the at least one half-profile to the terminal portion of the at least one half-profile in order to increase a negative breakaway incidence of the blade , the second step being provided with the following sub-steps: - movement of the leading edge of each aerodynamic profile of the blade by a third distance d perpendicularly to a line segment connecting the leading edge and the trailing edge , of the intrados half-profile towards the extrados half-profile , the initial leading edge portion or, where necessary, the new leading edge portion of the two half-profiles of the aerodynamic profile also being moved, and - defining a new intermediate portion of the two half-profiles which connect the initial leading edge portion or, where necessary, the new leading edge portion of the two half-profiles to the terminal portion of the two half-profiles . - increasing the radius of the initial leading edge circle of the at least one half-profile in order to form at least one new leading edge circle of the at least one half-profile of which a portion constitutes a new leading edge portion of the at least one half-profile , the new leading edge circle being tangential to the initial leading edge circle of the at least one half-profile in the region of the leading edge , and - defining a new intermediate portion of the at least one half-profile replacing the intermediate portion of the at least one half-profile and connecting the new leading edge circle of the at least one half-profile to the terminal portion of the at least one half-profile in order to increase a negative breakaway incidence of the blade , - movement of the leading edge of each aerodynamic profile of the blade by a third distance d perpendicularly to a line segment connecting the leading edge and the trailing edge , of the intrados half-profile towards the extrados half-profile , the initial leading edge portion or, where necessary, the new leading edge portion of the two half-profiles of the aerodynamic profile also being moved, and - defining a new intermediate portion of the two half-profiles which connect the initial leading edge portion or, where necessary, the new leading edge portion of the two half-profiles to the terminal portion of the two half-profiles . <EOS>