| U.I | |
|---|---|
| Type | 9-cyl Rotary piston engine |
| National origin | Germany |
| Manufacturer | Motorenfabrik Oberursel |
| Developed from | Gnome Delta |
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[1] that Oberursel was producing under licence before the war. It produced 75 kW (100 hp).