Opel-RAK were a series of rocket vehicles produced by Fritz von Opel, of the Opel car company, in association with others, including Max Valier and Friedrich Wilhelm Sander largely as publicity stunts.
The Lippisch Ente a rocket-powered glider was produced on June 11, 1928, piloted by Fritz Stamer, but is not usually considered part of the series.
Opel RAK.1 - a rocket car that achieved 75 km/h (47 mph) on March 15, 1928
Opel RAK.2 - rocket car May 23, 1928 reached a speed of 230 km/h (143 mph) driven by 24 solid-fuel rockets
Opel RAK.3 rocket train (quoted speed is variously 254 or 290 km/h. See: , , , , ) On the second run the train jumps the track and is destroyed.
Opel Rak IV rocket train, destroyed when a solid rocket explodes on the track, exploding all the other rockets. Railway authorities prohibit further runs.
Opel RAK.1 rocket glider September 30, 1929
Some stock footage of some of the rocket vehicles was incorporated into this early SF film.
How would you like one of these guys to land on your head? People walking through a particular field in the Netherlands get the chance to find out what its like. The friendly owl likes to spend a minute or so on his human perches before flying off.