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  • Republic P-47 (Turbobolt) Jet-Powered Fighter / Interceptor Aircraft Concept


    A turbojet-powered version of the classic Republic P-47 Thunderbolt fighter was briefly considered by the USAAF after the arrival of the Messerschmitt Me 262 over Europe.

     Updated: 12/28/2016; Authored By Staff Writer; Content ¬©www.MilitaryFactory.com


    By the end of 1944, the Germans had pushed the Messerschmitt Me 262 "Schwalbe" into operational service, giving German pilots a decided edge in the skies over Europe. This prompted American authorities to expedite work on their own jet-powered types. However, traditional long-term development was not favored so the route of converting an existing airframe was entertained in an effort to bring the jet fighter into service as quickly as possible. One endeavor emerged from Republic whose P-47 "Thunderbolt" had already entrenched its legacy in the years-long war.

    The P-47 seemed a natural choice because of its oversized fuselage housing the massive and powerful Pratt & Whitney R-2800 "Double Wasp" series radial piston engine. The Republic product itself was a workhorse and excellent gunnery platform while also being used in the attack role by way of dropping bombs and launching rockets. The "tear-drop" style canopy gave its sole pilot excellent vision for a combat fighter and the inherent performance of the aircraft as a whole was equally excellent - capable of going toe-to-toe with the latest Messerschmitt Bf 109 and Focke-Wulf Fw 190 prop-driven designs coming out of German factories.

    Initially, engineers were called to fit the General Electric J31 centrifugal compressor turbojet engine into the aircraft in place of the R-2800. This jet engine was the same as used in the upcoming Bell P-59 "Airacomet" fighter as well as the Ryan FR "Fireball" mixed-power fighter and could generate up to 1,650 lb of thrust. In theory the mating seemed viable but it was soon found that, despite the large diameter of the P-47's existing fuselage, it was still not large enough to accommodate the J31 engine without much modification to the structure - thus delaying testing and service entry. From there came the decision to replace the J31 with the Allison J35 (about 4,000lb of thrust), this engine originally developed by General Electric as well. This engine would also soon power the classic Republic F-84 "Thunderjet" and Northrop F-89 "Scorpion" lines of the Cold War years (1947-1991) and its size was better suited to the P-47's airframe so work began to redraw the lines of the aircraft.


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    Republic P-47 (Turbobolt) Technical Specifications


    Service Year: 1946
    Type: Jet-Powered Fighter / Interceptor Aircraft Concept
    National Origin: United States
    Manufacturer(s): Republic Aviation Corporation - USA
    Production Total: 0



    Structural (Crew Space, Dimensions and Weights)


    Operating Crew: 1
    Length: 36.09 feet (11 meters)
    Width: 40.85 feet (12.45 meters)
    Height: 14.76 feet (4.50 meters)

    Weight (Empty): 10,031 lb (4,550 kg)
    Weight (MTOW): 18,078 lb (8,200 kg)

    Installed Power and Standard Day Performance


    Engine(s): 1 x Allison J35 axial flow turbojet engine developing about 3,800lb to 4,000lb of thrust.

    Maximum Speed: 450 mph (725 kph; 391 knots)
    Maximum Range: 621 miles (1,000 km)
    Service Ceiling: 37,730 feet (11,500 meters; 7.15 miles)
    Rate-of-Climb: 1,200 feet-per-minute (366 m/min)

    Armament / Mission Payload


    PROPOSED:
    6 OR 8 x 0.50 caliber Browning M2 Heavy Machine Guns (HMGs) in the upper nose assembly.

    Global Operators / Customers


    United States

    Model Variants (Including Prototypes)


    P-47 "Thunderbolt" - Base Series Designation on which the turbojet-powered form was based on.