7-cylinder Oberusal U.0 rotary engine on the test stand, circa 1915. This 60kw/80 hp engine was a German licenced copy of the French Gnome 7 Lambada. It was Motorenfabrik Oberusel's first production engine and powered several early German warplanes at the start of WWI. The Fokker M.5 (direct ancestor of the Eindeckers), early production examples of the Fokker E.I and some examples of the Pfalz E-types all made use of the U.O














