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Optimum wing spanloads were evaluated by comparing wing performance values from theoretical predictions and experimental wind-tunnel measurements. The optimum spanloads were found using a Lagrange multiplier optimization method. They were designed with a prescribed wing-root bending moment constraint with and without incorporating viscous representation. Wind-tunnel models were created based on the optimum spanloads and the experiments were conducted to evaluate the changes in drag as the design constraints differed.The results indicate that an optimized spanload having equal lift and wing-root bending moment to that of an elliptically-loaded wing can experience significant decreases in drag. Comparisons between the theoretical predictions and the wind-tunnel models were made using experimental 5hole probe wake-survey measurements, which were reduced into total lift and drag, as well as spanwise lift distributions.iii Thanks to my parents for all their love and hard work getting me here, To Mike for believing in me, always. Love yah, bug.And to Bub and Cooper for being the best friends a gal could ever ask for.iv

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