$79 5-AT Trimotor 3D model by chipbasschao. Available on CGTrader with 110487 polys and 72625 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 24.6 MB), OBJ (OBJ, filesize: 24.6 MB), 3DS (3D Studio, filesize: 24.6 MB), C4D (Cinema 4D, filesize: 24.6 MB), DAE (Collada, filesize: 24.6 MB), DXF (DXF, filesize: 24.6 MB), FBX (Autodesk FBX, filesize: 24.6 MB)