The Oberursel U.I was an early German aircraft engine that powered many German fighter aircraft in the first part of World War I. It was a 9-cylinder air-cooled rotary engine, a licence-built copy of the Gnome Delta that Oberursel was producing under licence before the war. It developed 75 kW (100 hp).
|A Gnome 9 Delta, from which the U.I was copied, on display at the Musée des Arts et Métiers, Paris|
|Type||9-cyl Rotary piston engine|
|Developed from||Gnome Delta|