The purpose of the Refan Program is to establish the technical feasibility of substantially reducing the noise levels of existing JT8D powered aircraft. This would be accomplished by retrofitting the existing fleet with quieter refan engines and new acoustically treated nacelles. No major technical problems exist that preclude the development and installation of refanned engines on aircraft currently powered by the JT8D engine. The refan concept is technically feasible and provides calculated noise reductions of from 7 to 8 EPNdB for the B727-200 aircraft and from 10 to 12 EPNdB for the DC-9-32 aircraft at the FAR Part 36 measuring stations. Corresponding reductions in the 90 EPNdB footprint area are estimated to vary from about 70 percent for the DC-9 to about 80 percent for the B727.


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    Title :

    Reduction of JT8D powered aircraft noise by engine refanning


    Contributors:

    Conference:

    Air Transportation Meeting ; 1974 ; Dallas, TX


    Publication date :

    1974-04-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Reduction of JT8D powered aircraft noise by engine refanning

    Stitt, L. E. / Medeiros, A. A. | NTRS | 1974


    Reduction of JT8D Powered Aircraft Noise By Engine Refanning

    Medeiros, A.A. / Stitt, L.E. | SAE Technical Papers | 1974


    Reduction of Jt8d Powered Aircraft Noise by Engine Refanning

    L. E. Stitt / A. A. Medeiros | NTIS | 1974



    Development of JT8D Turbofan Engine Composite Fan Blades

    S. A. SATTAR / H. STARGARDTER AND D. G. RANDALL | AIAA | 1971