Jumo 004B Engine

Jet engines enabled aircraft to fly farther, faster, and at less cost than piston engine aircraft could.

Display Status:

This object is on display in the Boeing Milestones of Flight Hall exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

Junkers Jumo 004 B4

Designed by Dr. Anselm Franz, the Junkers Jumo 004 was the world’s first mass-produced, operational turbojet engine. It was also the first turbojet in the world with axial-flow compressors, afterburning, and a variable area exhaust nozzle. The original 004 A model flew for the first time in 1942, but it was not suitable for production because it was too heavy and used alloys in short supply in Germany.

The 004 B production model was easier to manufacture, weighed less, and used air cooling for the combustor, turbine blades, and exhaust nozzle. The engine powered the Messerschmitt Me 262, the first operational jet fighter, and the Arado 234, the first operational jet bomber and reconnaissance airplane. Volume production of the 004 B began in early 1944. Junkers manufactured nearly 6,000 Jumo 004 engines by the end of World War II.

Transferred from the U.S. Air Force, Wright-Patterson Air Force Base, Ohio


Thrust/speed:8,807 N (1,980 lb) at 8,700 rpm

Compressor:8-stage axial flow

Combustor:6 straight-through chambers

Turbine:1-stage axial flow

Manufacturer:Junkers Flugzeug und Motorenwerke A.G., Dessau, Germany


Collection Item Long Description:

  • Pull Ring

    Note the pull ring at the nose cone of Jumo 004. The engine could be started manually using a lawn mower–type pull cord.



Inventory Number


Physical Description

  • Type: Turbojet
  • Thrust/speed: 8,807 N (1,980 lb) at 8,700 rpm
  • Compressor: 8-stage axial
  • Combustor: 6 straight-through chambers
  • Turbine: Single-stage axial
  • Manufacturer: Junkers Flugzeug und Motorenwerke A.G., Dessau, Germany

Credit Line

Transferred from the U.S. Air Force, Wright-Patterson AFB, Ohio


Dr Anselm Franz

Country of Origin



Overall: 387.3 × 253.4 × 81.3cm, 739.4kg (12 ft. 8 1/2 in. × 8 ft. 3 3/4 in. × 2 ft. 8 in., 1630lb.)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


PROPULSION-Turbines (Jet)

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