Patent ID: 11970985
Assignee: ROLLS-ROYCE CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 19:
20. A method comprising:
providing a fan case assembly adapted for use with a gas turbine engine, the fan case assembly including a case that extends circumferentially at least partway about an axis of the gas turbine engine and is formed to define a plenum that extends circumferentially at least partway about the axis and a plurality of vanes pivotably coupled to the case in the plenum to pivot about a pivot axis relative to the case,
locating the plurality of vanes in a closed position in which each vane covers a portion of the plenum to block fluid communication between the gas path and the plenum, and
pivoting the plurality of vanes to a fully open position in which each vane is at a maximum angle relative to a gas path of the gas turbine engine to provide an opening to allow fluid communication between the gas path of the gas turbine engine and the plenum in response to one preselected operating condition included in a plurality of preselected operating conditions.