Sikorsky S64 Skycrane Low-poly 3D model is available on CGTrader for $15. Original author: Helijah. Specs: 270000 polys, 279000 verts.
STL (Stereolithography, filesize: 22.9 MB), OBJ (OBJ, filesize: 41.9 MB), GLTF (glTF, filesize: 27.6 MB), FBX (Autodesk FBX, filesize: 17.2 MB), BLEND (Blender, filesize: 51.6 MB), OTHER (Other, filesize: 47.7 MB), PNG (PNG, filesize: 8.8 MB)