US 11,753,156 B2
Main rotor blade using integral metallic center block strap assembly
David N. Schmaling, Southbury, CT (US); James Breen Orbon, New Haven, CT (US); Pedro L. Cabrera, West Haven, CT (US); David H. Hunter, Cheshire, CT (US); and John D. Carroll, Fort Worth, TX (US)
Assigned to LOCKHEED MARTIN CORPORATION, Bethesda, MD (US)
Filed by LOCKHEED MARTIN CORPORATION, Bethesda, MD (US)
Filed on Jul. 15, 2020, as Appl. No. 16/929,889.
Prior Publication US 2022/0017216 A1, Jan. 20, 2022
Int. Cl. B64C 27/473 (2006.01); B64C 27/10 (2023.01)
CPC B64C 27/473 (2013.01) [B64C 27/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rotor blade assembly of an aircraft having a rotor hub, comprising:
a structural member having an inboard end and an outboard end, the structural member being connectable with the rotor hub;
a spar surrounding the structural member and extending at least partially along a rotor blade axis;
a pitch bearing assembly supportive of the spar relative to the structural member, the pitch bearing assembly including:
an inboard pitch bearing mounted to the inboard end of the structural member; and
an outboard pitch bearing mounted to the outboard end of the structural member; and
a centrifugal assembly including a centrifugal bearing, the centrifugal bearing being disposed between the inboard pitch bearing and the outboard pitch bearing relative to the rotor blade axis.