Dornier Do 215 - Design and Development

Design and Development

The Do 17 fast bomber elicited renewed interest from foreign air forces (after the initial Do 17K series production). In July 1937, Dornier therefore prepared a pre-series Do 17 Z-0 as a demonstrator for export customers. It was given the civil registration D-AAIV. While this aircraft was essentially identical to the production Do 17Z, the Reichsluftfahrtministerium assigned the designation Do 215 to the export version. The V1 prototype retained the 9-cylinder Bramo 323 Fafnir radial engine of the Do 17Z.

The second prototype (Do 215 V2) was equipped with Gnome-Rhône 14-NO radial engines. It safely completed testing, but did not attract export orders because it did not offer a notable performance increase over the Do 17Z. Dornier therefore equipped the V3 prototype with the 1,175 PS (1,159 hp) Daimler-Benz DB 601Ba inline engines (note: it is not the first time DB engines where used in a Do 17 series). The V3, which first flew in the spring of 1939, showed a noticeable improvement in flight performance compared to the earlier prototypes.

Series production of the Do 215 A-1 began in 1939. The order, intended for the Swedish Air Force, was stopped in August 1939 due to the political situation. The 18 extant aircraft were embargoed and pressed into Luftwaffe service upon the outbreak of World War II.

Some modifications were made and the resulting aircraft were redesignated Do 215B. This was the standard production version. According to official figures 105 Do 215s were produced between 1939 and 1941 by Dornier in their factory at Oberpfaffenhofen.