Patent ID: 8657570

Claim:
An airfoil comprising: a first sidewall; a second sidewall coupled to the first sidewall at a leading edge and at a trailing edge; a tip portion extending between the first and second sidewalls and defining an airfoil tip of the airfoil; and a tip-cutter located on the first sidewall at the leading edge and near the tip portion, the tip-cutter defining a tip-cutter profile comprising an arcuate portion on the leading edge and a flat portion on the leading edge between the arcuate portion and the tip portion of the airfoil, the arcuate portion defining a recess in the leading edge that extends in the chord-wise direction toward the trailing edge of the airfoil, the flat portion defining a cutter-angle with the leading edge that extends in the chord-wise direction toward the trailing edge of the airfoil, wherein the tip-cutter is capable of removing a portion of an abradable material during a tip rub.