The Rail Zeppelin designed and built in 1929 by Franz Friedrich Kruckenberg reached a speed record over 230 km/h / 144 mph on June 21, 1931 between Hamburg and Berlin. This record stood for 24 years. The wooden propeller on the back of the car was powered by a 600 hp BMW 12-cylinder, lightweight airplane motor. The total weight of the Rail Zeppelin was only 18.6 metric tons, which surely contributed considerably to this record. The two-axle car was 25.85 meters / 84 feet 9-5/16 inches long and had a wheelbase of 19.6 meters / 64 feet 3-3/4 inches. Unfortunately, the Rail Zeppelin was stored after being equipped with a new motor in 1934 and being used for a time for test runs. It was later scrapped due to the poor condition it was in after being stored.