Patent ID: 8123471

Claim:
A variable stator vane comprising: an airfoil mounted on a button centered about a rotational axis, the airfoil including airfoil leading and airfoil trailing edges and airfoil pressure and airfoil suction sides, the button having circular leading and circular trailing edges circumscribed about the rotational axis at a button radius and generally corresponding to the airfoil leading and airfoil trailing edges respectively, the circular leading edge being upstream of the circular trailing edge, contoured pressure and contoured suction sides extending from the circular leading edge to the circular trailing edge, the contoured pressure and contoured suction sides being recessed inwardly from a perimeter circumscribed about the rotational axis at the button radius, the contoured pressure side having upstream and downstream pressure side portions, the contoured suction side having upstream and downstream suction side portions, one of the upstream and downstream pressure side portions being substantially straight and another of the upstream and downstream pressure side portions being substantially convexly curved, one of the upstream and downstream suction side portions being substantially straight and another of the upstream and downstream suction side portions being substantially convexly curved, and one of the upstream pressure side portion and the upstream suction side portion being substantially straight and another of the upstream pressure side portion and the upstream suction side portion being substantially convexly curved.