A percussion drilled shaped through hole formed between a first surface
and a second surface of a component and a method of forming the through
hole. The through hole is defined by a primary crater, a secondary
crater, and a metering hole. The primary crater is formed using laser
percussion drilling in the first surface of the component. The secondary
crater is formed using laser percussion drilling within the primary
crater and substantially offset from a centerline of the primary crater.
The metering hole is formed using laser percussion drilling within the
secondary crater and extending through the component to the second
surface. The primary crater, the secondary crater, and the metering hole
define a Coand{hacek over (a)} ramp and provide for the flow of fluid
through the percussion drilled shaped through hole according to the
Coand{hacek over (a)} effect.