 The first flight of the prototype took place on June 25, 1948 and a second prototype flew in July.The prototype participated later in the same year in an aerobatic competition in Grenchen, Switzerland, and in Ziar, Poland in 1949, where its good aerobatic and gliding characteristics drew considerable attention.Unfortunately serial production was disrupted by geopolitical developments, as the factory was charged with production of MiG-15, MiG-19 and MiG-21F aircraft, and access to Western civil export markets was progressively hampered by the emergence of the Iron Curtain.