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Oberursel UR-2 Rotary

The Oberursel UR-2 rotary engine, rated at 110 hp, was the type used to power the Fokker Dr.1 triplane. Built by the Oberursel Motoren Gesellschaft of Frankfurt, Germany, it was an exact copy of the famous French LeRhone 110-hp rotary engine.

The UR-2 from Baron Manfred von Richthofen's airplane is on display at the Imperial War Museum, London, England. The UR-2 on display is one of the very few still in existence.

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Baron Manfred von Richthofen