A helicopter fuselage with a longitudinal middle plane and an aerodynamic blunt aft body, said helicopter fuselage comprising - left hand and right hand side fuselage surfaces (5, 6) essentially parallel to said longitudinal middle plane, - an aft surface between said left hand and right hand fuselage surfaces (5, 6) with an essentially normal alignment of said aft surface to said longitudinal middle plane, and - at least two strakes (7, 8) provided along the aft surface and/or the respective left hand and right hand side fuselage surfaces (5, 6) as an essentially mirrored image of each other with respect to said longitudinal middle plane, characterized in that each strake (7, 8) is defined by - its location between the first and the second intersection lines (3, 4) resulting from intersections of horizontal planes (moving from z1 to z2) with the aft surface or the respective left hand and right hand side fuselage surfaces (5, 6), the first intersection line being defined by lateral points resulting from said intersections with a local tangent lying in the horizontal plane (z), at an angle of 15° relative to the middle plane, the second intersection line being defined by inner points resulting from said intersections with a local tangent lying in the plane (z) at an angle of 60° relative to the middle plane, - a surface between said first and second intersection lines (3, 4) is defined within a bounding box and - a two or three dimensional spline from the surface towards the aft surface inside said first and second intersection lines (3, 4). - left hand and right hand side fuselage surfaces (5, 6) essentially parallel to said longitudinal middle plane, - an aft surface between said left hand and right hand fuselage surfaces (5, 6) with an essentially normal alignment of said aft surface to said longitudinal middle plane, and - at least two strakes (7, 8) provided along the aft surface and/or the respective left hand and right hand side fuselage surfaces (5, 6) as an essentially mirrored image of each other with respect to said longitudinal middle plane, characterized in that each strake (7, 8) is defined by - its location between the first and the second intersection lines (3, 4) resulting from intersections of horizontal planes (moving from z1 to z2) with the aft surface or the respective left hand and right hand side fuselage surfaces (5, 6), the first intersection line being defined by lateral points resulting from said intersections with a local tangent lying in the horizontal plane (z), at an angle of 15° relative to the middle plane, the second intersection line being defined by inner points resulting from said intersections with a local tangent lying in the plane (z) at an angle of 60° relative to the middle plane, - a surface between said first and second intersection lines (3, 4) is defined within a bounding box and - a two or three dimensional spline from the surface towards the aft surface inside said first and second intersection lines (3, 4). - its location between the first and the second intersection lines (3, 4) resulting from intersections of horizontal planes (moving from z1 to z2) with the aft surface or the respective left hand and right hand side fuselage surfaces (5, 6), the first intersection line being defined by lateral points resulting from said intersections with a local tangent lying in the horizontal plane (z), at an angle of 15° relative to the middle plane, the second intersection line being defined by inner points resulting from said intersections with a local tangent lying in the plane (z) at an angle of 60° relative to the middle plane, - a surface between said first and second intersection lines (3, 4) is defined within a bounding box and - a two or three dimensional spline from the surface towards the aft surface inside said first and second intersection lines (3, 4).