The Schienenzeppelin or rail zeppelin was a speculative railcar which looked like a Zeppelin airship in look. It was developed and established by the German airplane engineer Franz Kruckenberg in 1929.
Propulsion was by methods of a pusher prop situated at the back: it sped up the railcar to 230.2 km/h (143 miles per hour) setting the land speed record for a fuel powered rail automobile. Just a single example was ever developed, which due to security issues stayed out of service and was lastly taken apart in 1939. [ source ]