Modern Airship concept Free 3D model is available on CGTrader for free. Original author: hlostoops.
STL (Stereolithography, filesize: 56.9 KB), OBJ (OBJ, filesize: 62.7 KB), 3DS (3D Studio, filesize: 29.1 KB), DAE (Collada, filesize: 99.1 KB), FBX (Autodesk FBX, filesize: 96.8 KB), IGE (IGES, filesize: 299 Bytes), MAX (Autodesk 3ds Max, filesize: 99.3 KB), SKP (Sketchup, filesize: 211 KB), OTHER (Other, filesize: 30 KB)