Patent ID: 7278825

Claim:
An airfoil comprising: a frontal surface that leads through a fluid; an first surface relating with said frontal surface that receives fluid flow thereon; a second surface opposite said first surface and relating with said frontal surface, said second surface also receiving fluid thereon; a airfoil tip relating to said first and second surfaces that releases fluid from said airfoil; at least one fluid flow regulator featured and operable with said first surface, said fluid flow regulator comprising a leading edge, a trailing edge, and a pressure recovery drop extending between said leading and trailing edges to form a down step, said pressure recovery drop comprising at least one drop face of a calculated height formed therein, said fluid flow regulator functioning to optimize air flow, reduce separation of said fluid over said first surface of said airfoil, and reduce induced noise; and at least one fluid flow regulator featured and operable with said second surface.