So how do they put in the tiny little holes?
Quote:
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To maintain these temperatures, turbine airfoils subjected to the hottest gas flows must be cast with intricate internal passages and surface hole patterns needed to channel and direct cooling air (bled from the compressor) within and over their exterior surfaces.
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Is it cost competitive with 3D printing?
Quote:
https://newsroom.porsche.com › en › ...-rs-21462.html
Innovative pistons from a 3D printer for increased ... - Porsche Newsroom
For the first time, the pistons for the high-performance engine of the 911 flagship model, the GT2 RS, are now being produced with a 3D printer. 3D printing allows the pistons to be manufactured with a structure that is optimised for the loads acting on the pistons. As a result, the pistons from the advance development project weigh ten percent ...
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