ROTOR HEAD, A ROTOR, AND A ROTORCRAFT

摘要

A head for a rotor of a rotorcraft, the head comprising a cap extending radially from an axis of rotation in elevation towards a periphery and extending in azimuth over 360 degrees, the cap extending in thickness between an inside face that is to face a hub of the rotor and an outside face overlying the inside face, the periphery being crenellated to define a succession of crenellations and of notches, each notch allowing a blade of the rotor to perform flapping motion.

主权项

1. A head for a rotor of a rotorcraft, the head comprising a cap extending radially from an axis of rotation in elevation towards a periphery and extending in azimuth over 360 degrees, the cap extending in thickness between an inside face that is to face a hub of the rotor and an outside face overlying the inside face, the periphery being crenellated to define a succession of crenellations and of notches, each notch allowing a blade of the rotor to perform flapping motion, wherein each of the crenellations presents a streamlined profile at least in a section plane P perpendicular to the axis of rotation in elevation, the streamlined profile presenting:
varying thickness measured between the inside face and the outside face; a suction side formed by the outside face and a pressure side formed by the inside face; and a leading edge that is substantially rounded, having a first radius of curvature, and a trailing edge that is substantially rounded, having a second radius of curvature.