Patent ID: 7438527

Claim:
An airfoil having a tip, a pressure side wall having a span-wise extending downstream edge and a suction side wall having a downstream trailing edge, said downstream edge being spaced from said trailing edge to expose a back surface of said suction side wall, comprising; a span-wise cooling air cavity defined between said pressure and suction side walls; a trailing edge region disposed downstream of said cavity; a span-wise extending slot fluidly interconnecting said cooling air cavity to said trailing edge region; wherein said slot includes a plurality of pedestals extending between said suction side and pressure side walls and through said slot, said pedestals being disposed in span wise extending rows with the most upstream row having pedestals of greater cross sectional dimension and those more downstream rows having pedestals of lesser cross sectional dimension wherein said most upstream row of pedestals are generally elliptical in cross section, and with those pedestals near said tip having their major axes being progressively angled away from a longitudinal orientation and toward said tip.