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    PW4000-94

    The Pratt&Whitney PW4000-94 engine is destined for twin-engine aircraft such as the A300 and B747. The advanced technologies used like the turbine with “single-crystal” airfoils and the FADEC, have contributed to reliability, and guaranteed optimised fuel consumption.

    The current PW4000 engine satisfies and forestalls the present requisites of polluting and noise emissions. To guarantee a further reduction in emissions, especially NOx, the new technology TALON (Technology for Advanced Low NOx) is available for the combustor.

    Avio, partner of Pratt&Whitney, is responsible for the production and supply of spare parts for the Accessory Drive Train and Oil Tank.

    The PW4000-94 is a twin-shaft turbofan engine with a high-dilution ratio.
    It is equipped with a Full Authority Digital Electronic Control (FADEC) system.

    It has a twin-shaft configuration featuring:

    • high-pressure turbine with eleven axial stages
    • two-stage high-pressure turbine
    • four-stage high-pressure turbine

    Main engine characteristics

    Max Power at SL 52.000 - 62.000 lb
    Fan diameter 94 inches
    Overall pressure ratio 27.5 - 32.3
    Bypass ratio 4.8 - 5.0

    Avio's module details

    Accessory Drive Train

    The accessory drive train includes:

    • angular gearbox, directly supported on the front engine casing;
    • accessories gearbox, mounted in the central part of the engine, which drives the 7 accessories of the engine and aircraft;
    • countershaft that mechanically connects the angular gearbox to the accessories gearbox.

     

    Other Components
    • The oil tank is integrated into the accessories gearbox.

     

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