Edmund Rumpler, Paul Jaray, and Baron Reinhard von Koenig-Fachsenfeld are names that no historian of aerodynamics can ignore. In the early 1900s, these three pioneers of aerodynamics began to adapt the body shapes of automobiles to match the flow of air. They came up with some astounding ideas, encouraged by a growing enthusiasm for aviation at the time and often inspired by patterns found in nature.Shapes like wings and teardrops served inventors as vital wellsprings of ideas. At first, however, it was anything but easy for engineers to get their ideas accepted. At that time, their aerodynamic bodywork designs, based on scientific findings, were too far removed from what customers and manufacturers expected in a car. However, new research and design methods, such as wind tunnel research, helped change people’s thinking.

An aerodynamic concept tested in racing: “Streamline”

Streamline is a term taken from the scientific study of fluids. In the period between the two world wars, this unique shape fascinated aerodynamics researchers. Engineers aimed to reduce vehicle bodies’ air resistance to lower fuel consumption and make cars more suitable for long-distance driving. Motorsport offered an ideal testing ground for manufacturers. For example, in early 1937, the racing department at Auto Union AG began developing a fully streamlined car based on the Auto Union Type C. The engine and chassis remained virtually unchanged. The design of the streamlined body was primarily based on the work of Josef Mickl, the aerodynamics engineer from the Porsche design office. The streamlined car made its debut at the AVUS race in 1937, where it achieved record speeds of over 400 km/h (249 mph) in numerous record-breaking runs.

The new special exhibition “Streamlined” at the Audi museum mobile presents the research and development, the driving personalities, and the basic aerodynamic concepts of the period up to 1945. Rare and unique vehicles are also on display – more than a dozen large exhibits. They document the remarkable combination of efficiency, sustainability, and design unique to aerodynamics.

Stefan Felber, curator of the Audi museum mobile: “The highlight of our cross-brand special exhibition is the Audi Type C Jaray, which was completed in 2023. Experts had assumed that this car was built by Paul Jaray, based on a Audi Type K. During preparations for the special exhibition, the exhibition team’s research proved that this vehicle must have been based on an Audi Type C.” From December 1, anyone interested in how aerodynamics developed after 1945 can dive into its post-war history at the August Horch Museum in Zwickau. Visitors to the museum can look forward to almost two dozen large exhibits and other models in the follow-up exhibition titled “Form vollendet.” Thomas Stebich, who is responsible for both the Audi museum mobile and the August Horch Museum, emphasizes: “Our two-part exhibition series in both museums will present for the first time a comprehensive overview of the subject of aerodynamics from its beginnings to the present day.” From July 2024, the second part of the exhibition titled “Form vollendet” will move to the Audi museum mobile in Ingolstadt.