The blade 6 for the anti-torque tail rotor 3 of the present invention of the helicopter 1 has a leading edge 8 opposite to the blade edge 6 extending along the longitudinal axis B of the blade 6, And the trailing edge 9 interacts with the airflow behind the leading edge 8 in use and the blade 6 also has a leading edge 8 and a trailing edge 8, With respect to the axis of rotation A of the blade 6, two opposing faces 12,13 extending between the first end 10 and the second end 9, And a root portion (14a) extending toward the second end (11) opposite to the root portion (14a), the root portion (14a) having a plane perpendicular to the leading edge (8) and the trailing edge Has a profile G which is asymmetrical with respect to the cord P connecting the leading edge 8 and the trailing edge 9 when the cross section is taken.;A shaft, a blade, a hub, a leading edge, a trailing edge, a first side, a second side, a first end, a second end, a root, a profile.
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