3D printed propeller project, 7 pieces glued together, total length 120cm, painted, clear coated. Free download:
https://www.3dfindit.com/cad-bim-library?lang=en_US&path=dape%2Fvehicles_transportation&pk_campaign=PrusaPrinters&pk_kwd=prusaprinters
The author hasn't provided the model origin yet.