jet178In aerospace engineering: Aeronautical engineeringit was a German Heinkel He 178 that made the first jet flht on Aug. 27, 1939. Even though World War II accelerated the growth ofThe Heinkel He 178 was an experimental aircraft desned and produced by the German aircraft manufacturer Heinkel.It was the world's first aircraft to fly using the thrust from a turbojet engine.. The He 178 was developed to test the