Tatra 77
The Tatra 77 is one of the first serial-produced, truly aerodynamically-designed automobiles, produced by Czechoslovak company Tatra from 1934 to 1938. It was developed by Hans Ledwinka and Paul Jaray, the Zeppelin aerodynamic engineer. Launched in 1934, the Tatra 77 is a coach-built automobile, constructed on a platform chassis with a pressed box-section steel backbone rather than Tatra's trademark tubular chassis, and is powered by a 60 horsepower (45 kW) rear-mounted 2.97-litre air-cooled V8 engine, in later series increased to a 75 horsepower (56 kW) 3.4-litre engine. It possessed advanced engineering features, such as overhead valves, hemispherical combustion chambers, a dry sump, fully independent suspension, rear swing axles and extensive use of lightweight magnesium alloy for the engine, transmission, suspension and body. Another one of his significant contributions to automotive design was the streamlined car body. Under him, Tatra brought the first mass-produced streamlined cars to the market. With his son Erich, who became chief designer at Tatra, Ledwinka and Erich Übelacker, a German engineer also employed by Tatra, designed the streamlined Tatra models T77, T77a, T87, and T97, all of which have rear-mounted air-cooled engines.