Kimi K3.1 Pro used Python to build a detailed turbofan model in FreeCAD, covering the fan, reduction gearbox, compressors, combustor, turbines, and external piping across 2,100 solids. The project supports step-by-step assembly, an exploded internal view, and rotational animation demonstrating the fan, low-pressure spool, and high-pressure spool at 2,780, 8,590, and 12,400 RPM respectively.