Helicopter rotor

A rotary aircraft rotor comprising a hub arranged for rotation about a rotor axis and supporting a plurality of rotor blades presenting each a root,

• said hub being formed in the direction of the number of blades,
• and being coupled to the root of each blade by means of a laminated spherical abutment mounted between an outer edge of the corresponding aperture and inner ends of two arms of a forked component intergral with the corresponding blade root, and having a center through which extends the blade beat flap axis,
• and of a resilient trailing return brace comprising an elongated stack of metal plates alternating with elastomeric shock-absorbing plates made of visco elastic material having great persistence of deformation, a first extremity of said brace being coupled to the corresponding blade root,
• wherein said rotor hub is a rigid one-piece hub having a peripheral part in form of a flat ring, the periphery of which is of the type comprising convex polygonal and substantially circular peripheries,
• said apertures being formed in said hub peripheral part, and each of said braces having two extemities each equipped with a ball-joint via which said first extremity is coupled to the corresponding blade root and the second extremity is coupled to a place on the hub periphery between the laminated sperical abutment of the corresponding blade and the laminated sperical abutment of an immediately neighbour blade
• said ball joint of said second brace extremity having its center near the beat flap axis of the corresponding blade.