This Junkers design was submitted for the Emergency Fighter Competition in Febuary 1945. The fighter had air intakes at the fuselage sides to divert the boundry-layer air flow to a vent outlet aft of the cockpit fairing. The wings were of wooden construction, swept back 45 degrees and had two small vertical fins and rudders on the wing trailing edges. 540 liters (143 gallons) of fuel were contained in the wings, and a further 1025 liters (271 gallons) were contained in a fuselage tank located just behind the cockpit. A pressurized cockpit was provided with an ejector seat and armor (protection from 12.7 mm rounds from the front, and 20 mm rounds from the rear). Power was supplied by a Heinkel-Hirth HeS 011 jet engine, and two MK 108 30 mm cannon were installed in the sides of the fuselage nose with 100 rounds each, with a provision for two more. Good results were obtained with a completed wind tunnel model, and a mock-up fuselage with an HeS 011 jet was built for tests in which it was to be mounted above a Ju 88. An additional night fighter/all-weather fighter with a lengthened fuselage and room for a second crew member was also in the design phase, but neither project was completed due to the war’s end.
As part of the Emergency Fighter Program (German: Jägernotprogramm), at the beginning of 1945 a programme was launched by the OKL in order to replace the He 162 Volksjäger. The new aircraft was intended to have superior performance in order to deal with high altitude threats such as the B-29 Superfortress. To meet this requirement, power was to be a single Heinkel HeS 011 turbojet. The designs of the official winner of the competition, the Junkers EF 128, were submitted in February 1945. The plane designs brought forward by other German aircraft makers were the Messerschmitt P.1110, Heinkel P.1078, Focke-Wulf Ta 183 and Blohm & Voss P 212.
This more advanced fighter attracted more interest than the austere Miniaturjäger among German aircraft manufacturers, but at the time of the Surrender of Nazi Germany in World War II only models had been built. It had swept wings which included wood in their construction. There was a projected variant of a two-seater all-weather/night fighter with a lengthened fuselage.