Lockheed Martin Corporation
Hingeless helicopter rotor with high stiffness and low drag configuration

Abstract:

A hub assembly for a rotary wing aircraft having a rotor shaft which rotates about a rotational axis includes: a hub extender arm coupled to the rotor shaft; a pitch bearing that is disposed within and connected to the hub extender arm; and a rotor blade assembly having an inboard section disposed within the hub extender arm and connected to the pitch bearing; wherein the hub extender arm has an inboard cross-sectional area where coupled to the rotor shaft that is greater than an outboard cross-sectional area where coupled to the pitch bearing.