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  • Junkers Ju EF 140 (Amerika Bomber) Jet-Powered Long-Range Heavy Bomber Proposal


    The Junkers contribution to the German wartime Amerika Bomber program was its Ju EF 140 design - originally based on the Horten P.18A.

     Updated: 4/22/2016; Authored By Staff Writer; Content ¬©www.MilitaryFactory.com


    What became the last Junkers wartime submission to the German Air Ministry during World War 2 (1939-1945) - the Junkers EF-140 (or "Project 140") - was actually a further development of the earlier Horten Ho P.18A flying wing bomber developed as part of the "Amerika Bomber" initiative. The initiative stemmed from the German need to generate a fleet of bombers capable of crossing the Atlantic and striking at major American cities along the east coast (hence the program's name). The bomber would have to possess inherently excellent range to reach these targets and return home after delivery of their war load. High altitude operation was a must for efficiency and to avoid interception by aircraft or ground-based fire.

    Thanks to the Allied air raids wreaking havoc on German war-making facilities and infrastructure, the Germans lost their chance to advance an atomic weapons program and were forced along a more conventional route utilizing more conventional methods. This gave renewed attention to a long range bomber for delivery of a large drop-bomb load and various German air concerns through their hat into the ring to secure a Luftwaffe contract for a long range, heavy-hitter. Despite several design competitions to fulfill the requirement, no one company could promise that their new bomber would possess the range necessary.

    The Horten Brothers (Walter and Reimar) were contacted during late 1944 due to their background in large, tailless "flying wing" aircraft that might fit the bill. Walter Horten responded with a possible submission which entailed use of no fewer than six Junkers Jumo 004 turbojet engines. The design was designated as the "P.18A" and Luftwaffe chief Hermann Goring himself championed the product.

    In an effort to expedite development of the bomber, it was decided by the Air Ministry to involve the talents of multiple firms - a design-by-committee approach being favored rather than give the lead to the small Horten team. Manufacture of the aircraft would fall to the Junkers concern which held extensive experience in arranging large aircraft prior to, and during, the war. Other companies thrown into the mix were representatives of Arado and Messerschmitt. Because of the relentless Allied air raids, it was decided to build the prototype in a cave - adding an air of secrecy to the entire program.


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    Junkers Ju EF 140 Technical Specifications


    Service Year: 1945
    Type: Jet-Powered Long-Range Heavy Bomber Proposal
    National Origin: Nazi Germany
    Manufacturer(s): Junkers - Nazi Germany
    Production Total: 0



    Structural (Crew Space, Dimensions and Weights)


    Operating Crew: 6

    Installed Power and Standard Day Performance


    Engine(s): 6 x Junkers Jumo 004 OR 6 x BMW 003 turbojet engines developing 2,205 lb of thrust each.

    Maximum Speed: 559 mph (900 kph; 486 knots)
    Maximum Range: 6,835 miles (11,000 km)
    Service Ceiling: 52,493 feet (16,000 meters; 9.94 miles)

    Armament / Mission Payload


    PROPOSED STANDARD:
    2 x 30mm MK 108 cannons in remote-controlled barbettes near nose section.
    2 x 30mm MK 108 cannons in remote-controlled barbettes at base of tail unit.

    OPTIONAL:
    Up to 8,000 lb of internally-carried conventional drop ordnance.

    Global Operators / Customers


    Nazi Germany

    Model Variants (Including Prototypes)


    Ju EF 140 - Base Project Designation

    Project 140 - Alternative Project Designation