The driving force was Max Valier, who turned as a specialist for rockets to Fritz Opel. He was an enthusiast for airplanes, recognized the publicity value for the company and together with Friedrich Sander, who was well versed in mini-rockets for sea rescue, one realized successively two-and four-wheeled vehicles, some of which were also rail-bounded. Later still be added a flying machine.

First attempts were there on the factory premises with an Opel employee as driver. The number of rockets for propulsion wasslowly increased. The most spectacular drive was the from Rak 2 on the Avus, where 225 km/h were reached. Here the left and right wings proved to be particularly important, because the vehicle threatened to lift off in front despite the drift generated by both.