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      Dornier Do P.256 (Project 256) Night-Fighter / Fighter-Bomber Aircraft Proposal  

    Dornier Do P.256 (Project 256) Night-Fighter / Fighter-Bomber Aircraft Proposal


    The Dornier Project 256 jet-powered night-fighter held little to recommend itself when presented to the German Air Ministry in the latter stages of World War 2.





     Updated: 1/6/2017; Authored By Staff Writer; Content ¬©www.MilitaryFactory.com


    Dornier of World War 2 Germany was forced by the Air Ministry to focus its production strength on bomber types, namely its important Do 17 and Do 217 lines as well as several flying boat types. However, this did not stop the company from attempting to sell the Luftwaffe on a few fighter designs of which the most important became the Do 335 "Arrow". This aircraft became one of the more unique of the war, a heavy fighter with a twin-engine (propeller-driven) arrangement in which the nose held one of the powerplants and the tail fitted the other. The fighter had the potential to be one of the war's best based on its presented speed and firepower but production issues limited output to just 37 examples by war's end in 1945.

    Another late-war fighter design attempt by the company became "Project 256" - or "P.256". This was centered around a February 1945 RLM requirement for a twin-engined, jet-powered all-weather/night fighter intended to remedy the situation in the air war and wrestle superiority away from the enemy before ground forces could swoop in an claim vital German facilities and force an end to the war. The P.256 could be broadly considered a jet-powered form of the prop-driven Do 335 for it used various elements first encountered with that design though, by and large, it was its own unique fighter offering.

    Since the turbojet pairing would be contained in underwing nacelles, the nose was clear to bring the cockpit forward and provide for better pilot vision. The empennage was made up of a conventional tail unit showcasing a large-area vertical fin as well as low-set horizontal planes. The low-wing mainplanes were left unswept - though there was some sweepback of the leading edges. The members were fitted at midships and each held an underslung engine pod along their midway point. A tricycle undercarriage rounded out the design's key physical qualities - a feature seen in the Do 335. The engine of choice became 2 x Heinkel-Hirth HeS 011 turbojets outputting 2,865 pounds of thrust each.

    Internally, it was thought that the aircraft would be crewed by three due to the systems required for the night-fighting role. Hence there would be a pilot, navigator and radar operator positioned in a pressurized cabin. The pilot shared the cockpit with the radar operator in a side-by-side seating arrangement while the navigator was set further aft in his own workspace facing aft. Survivability was enhanced some by way of cockpit armoring and bullet-resistant glass panels. Aft sections would be left largely unprotected and no defensive armament fitted - the thought being that the jet could simply out-fly any trailing interceptors at will.


    Dornier Do P.256 Technical Specifications


    Service Year: 1946
    Type: Night-Fighter / Fighter-Bomber Aircraft Proposal
    National Origin: Nazi Germany
    Manufacturer(s): Dornier Flugzeugwerke - Nazi Germany
    Production Total: 0



    Structural (Crew Space, Dimensions and Weights)


    Operating Crew: 3
    Length: 44.62 feet (13.6 meters)
    Width: 50.69 feet (15.45 meters)
    Height: 18.04 feet (5.50 meters)

    Weight (Empty): 15,124 lb (6,860 kg)
    Weight (MTOW): 24,912 lb (11,300 kg)

    Installed Power and Standard Day Performance


    Engine(s): 2 x Heinkel-Hirth HeS 011 turbojet engines developing 2,860 lb of thrust each.

    Maximum Speed: 548 mph (882 kph; 476 knots)
    Maximum Range: 870 miles (1,400 km)
    Service Ceiling: 29,593 feet (9,020 meters; 5.60 miles)
    Rate-of-Climb: 2,205 feet-per-minute (672 m/min)

    Armament / Mission Payload


    PROPOSED (standard):
    4 x 30mm MK 108 cannons in nose
    2 x 30mm MK 108 cannons in fuselage (Schrage Musik oblique gun arrangement).

    PROPOSED (optional):
    Provision for 2 x 1,100 pound bombs.

    Global Operators / Customers


    Nazi Germany

    Model Variants (Including Prototypes)


    P.256 (Project 256) - Base Proposal Designation

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