Check out Low Poly military airplane and helicopter pack 5 plus 1 Low-poly 3D model on CGTrader for $5. High-quality mesh by Arox-CG: 20797 polys, 22379 vertices.
OBJ (OBJ, filesize: 2.24 MB), BLEND (Blender, filesize: 116 MB), FBX (Autodesk FBX, filesize: 1.16 MB), DAE (Collada, filesize: 4.6 MB), OTHER (Other, filesize: 9.34 MB)