An analytical approach to aircraft design optimization is presented. Design variables are mainly associated with wing design and powerplant sizing. Several figures of merit are studied as a function of the design variables and analytical expressions are derived for partial and combined optima. Merit functions are lift drag ratio, specific range, fuel plus powerplant weight as a fraction of the takeoff weight and of the design payload, fuel plus powerplant plus wing weight fraction, payload weight fraction, fuel burned per seat-km, and direct operating costs. The design variables studied are: engine size, (mean) cruise wing loading, pressure altitude, lift coefficient, Mach number, and wing aspect ratio.


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    Title :

    Conceptual Design of Subsonic Transport Aircraft for Cruising Flight Optimized for Different Merit Functions


    Contributors:

    Publication date :

    1985


    Size :

    53 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English