Kammback

The K - cars ( comb - car) is a standard developed by Wunibald comb consumption reduced research cars with drag poor shape, of the Research Institute of Automotive Engineering and Vehicle Engines Stuttgart ( FKFS ) in the years 1938 to 1941, four copies were made. The vehicles had a semi - drop-shaped profile with a shortened tail (so-called K- tail ) and a marked lateral rear feeder. In addition to the aerodynamic drag coefficients with features down to 0.23 (then production vehicles had values ​​around 0.5 to 0.6 ) may be mentioned, among other things:

• Automatic tire pressure adjustment ( to reduce rolling resistance )
• Overdrive (lower engine speed to reduce consumption )
• Leaner mixture of the engines at highway speed ( also to reduce fuel consumption )

The most famous comb - car, at the same time that of the BMW K1 was from the year 1938/39, with the lowest value of 0.23; Base was a pre-production chassis of the BMW 335 also on the BMW 335 -based BMW K4 from 1939 / 40th