Patent ID: 7812282

Claim:
A method of forming a plurality of effusion holes on a combustor having a surface, the effusion holes each having an outlet on the combustor surface, the method comprising the steps of: rotating the combustor relative to a laser beam, and positioning the combustor to a first position where the laser beam is at a first predetermined angle relative to the combustor surface; pulsing the laser beam at the combustor surface to form a first plurality of trepan cuts; adjusting the first predetermined angle to a second position where the laser beam is at a second predetermined angle relative to the combustor surface; pulsing the laser beam at each trepan cut of the first plurality of trepan cuts, to thereby form a cut for at least a portion of each effusion hole outlet, wherein each cut overlaps a trepan cut of the first plurality of trepan cuts; and repeating the steps of rotating, pulsing the laser beam at the combustor surface, adjusting, and pulsing the laser beam at each trepan cut to so that each effusion hole has an outlet having a fan shape.