An unpowered semispan model of a representative turboprop configuration was tested to determine the effect of configuration modifications on the the nonmetric body and wing juncture. It is indicated that the jet off nacelle-installation drag can be approximately 25% of the cruise drag. However, the losses can be reduced to 17% by changes to the wing leading edge and nacelle intersection. Comparison of test results from a semispan nonmetric fuselage model with those from a full span metric fuselage show differences in angles of attack produced the same lift. It is found that the constant lift drag rise of the semispan model is higher because of the increased angle of attack to achieve the same lift.


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    Title :

    Installed Nacelle Drag-Improvement Tests of an M = 0.8 Turboprop Transport Configuration


    Contributors:
    A. D. Levin (author) / R. C. Smith (author)

    Publication date :

    1983


    Size :

    378 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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