Back in 1921, the Rumpler Tropfenwagen (Rumpler drop car) was unveiled at the German car show in Berlin. It was a real eye-catcher. Mainly developed on the basis of aerodynamic aspects, the bodywork is modelled on the shape of a falling drop of a liquid. The curved panes of glass used here proved to be an important design feature.
Curved windscreens are not only aerodynamically advantageous; they also give the driver a better all-round view. However, their influence on automobile design was particularly evident. Convex windscreens, curved to the sides as well as to the top and bottom, are now standard in car production. Glass is in fact playing an increasingly large role. Overall, the area of glass used in comparable models has increased by approx. 50 per cent over the last 35 years. On average, the windscreen has even increased in size by 60 per cent.