Keitel was a small German car manufacturer founded by Hans Keitel, an aircraft designer who worked as an aerodynamicist at Dornier. Between 1921 and 1922, he built two streamlined automobiles in different configurations, produced under the specially established company KaHa GmbH. The vehicles, referred to as "Luftstromwagen" (airstream cars), were powered by a four-cylinder engine supplied by Paul Baer of Berlin. The lineup included an open two-seater with a self-supporting…