Patent ID: 11939886
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. A method of manufacturing a downstream stator of a stator assembly, the stator assembly including an upstream stator and the downstream stator located downstream of the upstream stator, the method comprising:
determining circumferential positions around a central axis of the stator assembly where vanes of the downstream stator are at least partially exposed between vanes of the upstream stator thereby susceptible to foreign object damage;
installing a first vane of the downstream stator between two of the circumferential positions, a major portion of a leading edge of the first vane is circumferentially overlapped by one of the vanes of the upstream stator such that the major portion of the leading edge of the first vane is not visible along a line of sight parallel to the central axis and along a direction of a flow through the stator assembly, the major portion of the leading edge of the first vane including a radially-outer portion of the first vane, the first vane made of a first material; and
installing a second vane of the downstream stator at one of the circumferential positions such that a major portion of a leading edge of the second vane is visible through a spacing defined by two of the vanes of the upstream stator, the major portion of the leading edge of the second vane including a radially-outer portion of the second vane, the second vane made of a second material having a greater stiffness, strength, and/or ductility than that of the first material of the first vane.