Zmaj R-1
The Zmaj R-1 was a twin-engined prototype bomber from Yugoslavia, designed in the 1930s. On the third test- flight the pilot was unable to lower the landing gear and the resulting crash-landing resulted in damage to the propellers and engines. Replacement parts were imported from Germany and France delaying repairs considerably. The aircraft was rebuilt and testing resumed at the end of March 1941, but in early April the bombing of Zemun airport damaged the prototype Zmaj R-1 again. In late June 1941 the Germans scrapped the aircraft.