Quiet and efficient high-pressure fan assembly

A fan assembly comprising:

• a hub having a center axis about which said hub rotates;
• a plurality of rotor blades disposed circumferentially around and extending radially outward from said hub with unequal angular spacing between adjacent ones of said plurality of rotor blades, each of said plurality of rotor blades having a blade root joined to said hub and a blade tip with a blade span formed between said blade root and said blade tip wherein each of said blade root, said blade tip and cross-sections of said blade span parallel to said blade root is defined by a NACA-65 airfoil shape having a leading edge and a trailing edge;
• wherein, for each of said plurality of rotor blades, said leading edge associated with said blade root, said blade tip and said blade span is aligned along a straight line extending outward from said hub, said straight line defining a rotor blade leading edge, said straight line further defining an axis of rotation about which said blade span and said blade tip are rotated;
• wherein, for each of said plurality of rotor blades, said trailing edge associated with said blade root, said blade tip and said blade span combine to define a rotor blade trailing edge that extends from said hub at a non-perpendicular skew angle at a skew angle measured in a radial plane of said hub with respect to a first line extending radially outward from said center axis;
• said plurality of rotor blades further defining a solidity of greater than 1;
• each of said plurality of rotor blades having an axial chord length defined across a central portion of said blade span and parallel to said center axis;
• a frame;
• a plurality of stator vanes disposed circumferentially around and extending radially from said frame, said plurality of stator vanes being lesser in number than said plurality of rotor blades, each of said plurality of stator vanes having a leading edge that extends from said frame at:
• i) an inclined angle measured in said radial plane with respect to a second line extending radially outward from said center axis, and ii) a lean angle measured in an axial plane of said frame with respect to a third line extending radially outward from said center axis;
• and
• said frame with said plurality of stator vanes being positioned adjacent said hub with said plurality of rotor blades to define an axial gap between each said rotor blade trailing edge and said leading edge of each of said plurality of stator vanes, said axial gap increasing with radial distance from said center axis as defined by said skew angle and said inclined angle, said axial gap being a minimum of said axial chord length.