Analyses and design studies were conducted from August 1972 to June 1973 on the technical and economic feasibility of installing the JT8D-109 refan engine on the DC-9 aircraft. Design criteria included minimum change to the airframe to achieve desired acoustic levels. Several acoustic configurations were studied. The minimum selected acoustic treatment configuration results in an estimated aircraft weight increase of 608 kg (1,342 lb) and the maximum selected acoustic treatment configuration results in an estimated aircraft weight increase of 809 kg (1,784 lb). The range loss for the minimum and maximum selected acoustic treatment configurations based on long range cruise at 10,668 m (35,000 ft) altitude with a typical payload of 6,804 kg (15,000 lb) amounts to 54 km (86 n. mi.) respectively. Estimated reduction for minimum selected treatment show 8 EPNdB at approach, 12 EPNdB for takeoff with power cutback, 15 EPNdB for takeoff without power cutback, and 12 EPNdB for sideline. Little difference was estimated between minimum and maximum treatments due to reduced performance of maximum treatment. No major technical problems were encountered in the study. The refan concept for the DC-9 appears technically feasible and economicall viable at approximately $1,000,000 per airplane. (Author)


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    Title :

    Dc-9/Jt8d Refan, Phase 1


    Publication date :

    1973


    Size :

    332 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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