Patent ID: 6287076
Filing Date: 2001-09-11
Classification: B64C

Abstract:
A blade for an antitorque tail rotor of a helicopter, said blade having a profiled part, said tail rotor rotating about an axis of rotation and having a hub, said blade comprising:a blade root mounted to rotate in said hub and to facilitate rotation of said blade about its pitch axis, said blade root having an outer end and having an inner end on the same side as said axis of rotation, said blade root being hollow at its inner end, thereby defining an interior recess;an elastic stop having laminated elastomer elements arranged between an inner armature and an outer armature, said elastic stop for acting as a limited-action ball joint centered on said pitch axis, wherein said elastic stop:is arranged inside said blade root so that said outer armature is on the same side as said profiled part of said blade, while the inner armature is on the same side as said axis of rotation and is secured to said inner end of said blade root, andhas a central recess which is coaxial with said pitch axis; anda rigid tie rod having an inner end and an outer end, said tie rod connecting said elastic stop to said hub, wherein said tie rod passes with clearance through said central recess, and wherein the outer end of said tie rod is on the same side as said profiled part of said blade and is secured to said outer armature.