Pylon matched fan exit guide vane for noise reduction in a geared turbofan engine

A method of assembling a fan exit guide vane assembly comprising:

• defining an airfoil shape that provides desired performance;
• defining a family of airfoils shapes including a common forward geometry and differing aft geometry;
• determining an acoustic performance characteristic for each of a plurality of circumferential positions;
• selecting an airfoil shape from the family of airfoil shapes for each circumferential position of the fan exit guide vane assembly based on an acoustic performance characteristic;
• defining a common axial position of a leading edge of each of the exit guide vanes and a common axial spacing of a trailing edge of each of the exit guide vanes from the leading edge;
• and
• installing vanes at each circumferential position of a fan exit guide vane assembly including the selected airfoils based on the acoustic performance characteristic.