Percussion drilled shaped through hole and method of forming

A component, comprising:

• a structure including a first surface and a second surface;
• and
• a plurality of effusion cooling holes extending between the first and second surfaces, each effusion cooling hole comprising:
• a primary crater formed in the first surface of the structure, the primary crater having a maximum diameter and a first centerline;
• a secondary crater formed within the primary crater, smaller in size than the primary crater, the secondary crater having a second centerline that forms an angle with the first centerline, a first edge substantially adjacent to the first centerline and located proximate the bottom of the primary crater, a second edge substantially adjacent to an edge of the primary crater and located proximate the first surface, and a maximum diameter less than the maximum diameter of the primary crater;
• and
• a metering hole formed in the secondary crater and extending through the structure to the second surface.