Some cool compressor blade machining photos:
CV-990 #four engine exhaust
Image by wbaiv
One of the cooler things about walking about this old plane was that the evening wind was blowing via the nacelles and windmilling the fan and its turbine- so there was the characteristic "tink tink tink" sound of cold turbine pieces shifting in their hub as the engine rotated. Up to temperature, the disc and blades would expand and match tightly. I presume fans don’t make this noise, though typical compressor blades may well. Compressors get hot, fans do NOT get hot, the point getting a big volume of low stress and moderate speed flow.
102-0298_IMG
The ‘bench tool’ area, plus shelves
Image by Eli White