Began airship construction in 1907. In 1909 manufactured airplanes, but poor results stopped work in 1911. Airplane department reopened 1914. In October started design of four-engined aircraft similar to that of Sikorsky in Russia. As entirely new venture company sponsored designs by two Steffen brothers leading to giants R.I-VII of 1915-1917. R.VIII, which did not fly, was then world's largest airplane with span of 158 ft (48.16 m), and had experimental rotating gun-turret. Other advanced projects included steam-turbine monoplane and wire-guided flying bombs. Company also made E-l monoplane single-seat fighter and D-l copy of Nieuport. D-lll and D-IV also built in quantity. Fighters were technically very advanced.

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