Patent ID: 9623966
Date: 2017-04-18
CPC Classifications: B64C

Claim:
1. A rotor defining axial and radial directions and comprising: a hub, at least one rotor blade having a root and a tip and forming a conduit extending in the radial direction from the root to the tip, the root comprising a wall forming a hollow cylinder, the hollow cylinder forming a portion of the conduit and having a plurality of apertures extending longitudinally from an end of the root into the root, a feathering spindle rotatably connected to the hub and defining an interior cylindrical cavity, a first plurality of bolts substantially identical to one another, a second plurality of bolts substantially identical to one another and differing in at least one physical dimension from the first plurality of bolts, the first and second plurality of bolts distributed circumferentially within the wall of the root in an alternating pattern, and the first and second plurality of bolts extending in the longitudinal direction within the wall of the root to secure the at least one rotor blade to the feathering spindle; a tip jet secured to the tip of the at least one rotor blade; a plurality of threaded fasteners, each securing a different bolt of the first and second pluralities of bolts within a corresponding aperture of the plurality of apertures; wherein the root of the rotor blade extends in the radial direction through an interior cylindrical cavity defined by the feathering spindle sufficient for each bolt of the first and second plurality of bolts to pass through a corresponding aperture of the plurality of apertures.