US 11,920,495 B1
Airfoil with thick wishbone fiber structure
Christian X. Campbell, West Hartford, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Jan. 20, 2023, as Appl. No. 18/099,610.
Int. Cl. F01D 5/14 (2006.01); F01D 5/18 (2006.01); F01D 5/28 (2006.01); F01D 9/06 (2006.01)
CPC F01D 5/147 (2013.01) [F01D 5/188 (2013.01); F01D 5/282 (2013.01); F01D 5/284 (2013.01); F01D 5/187 (2013.01); F01D 9/065 (2013.01); F05D 2240/304 (2013.01); F05D 2260/2214 (2013.01); F05D 2300/6033 (2013.01); F05D 2300/6034 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An airfoil comprising:
an airfoil wall circumscribing a cavity and defining a leading edge, a trailing edge, and pressure and suction sides that join the leading edge and the trailing edge, the airfoil wall including a wishbone-shaped fiber layup structure,
the wishbone-shaped fiber structure including first and second arms that merge into a single leg,
the first and second arms being comprised of a network of fiber tows,
the single leg including fiber tows from each of the first and second arms that are interwoven, the single leg forming at least a portion of the trailing edge of the airfoil wall,
each of the first and second arms including a first section that is distal from the single leg and a second section that is proximal to the single leg,
the first section defining a first thickness and the second section defining a second thickness that is greater than the first thickness by a factor of 1.6-2.4, and
the single leg defining a third thickness that is greater than the second thickness.