Patent ID: 11970948
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An apparatus for a gas turbine engine, comprising:
a variable vane comprising a pivot axis and an airfoil, the variable vane configured to pivot about the pivot axis between a first position and a second position;
the airfoil extending spanwise along a span line between a first end and a second end, the airfoil extending chordwise along a chord line between a leading edge and a trailing edge, the chord line angularly offset from a reference plane containing the pivot axis by a twist angle,
the airfoil extending laterally between a first side and a second side;
a first section of the airfoil disposed at the first end, the twist angle varying as the first section extends spanwise along the span line;
a second section of the airfoil disposed spanwise between the first section and the second end, the twist angle uniform as the second section extends spanwise along the span line; and
a protuberance;
the first section and the second section misaligned from the protuberance when the variable vane is in the first position; and
at least a portion of the first section at the first end misaligned with the protuberance; and
at least a portion of the second section aligned with the protuberance when the variable vane is in the second position.