Effect of vertical position of the wing on the aerodynamic characteristics of three wing-body combinations

Results are presented of an experimental investigation of three plane wings in combination with a body such that the models were representative oflow-ar,d high-wing arrangements.The three wings, having 3-percent-thick sections and of aspect ratio 3, had the following plan forms: a tapered unswept plan form, a tapered 4 5 ' swept-back plan form, and a triangular plan form.The lift, drag, and pitching-moment characteristics of each conyiguration were obtained for a range of Mach numbers from 0.61 to 0.91 and from 1.20 to 1.90.The results were obtained at constant Reynolds numbers per foot of 2.57 million and 4.00 million at all Mach numbers except 1.90.At this Mach number, data were obtained only at a Reynolds number per foot of 2.57 million.The results of this investigation at a Reynolds number per foot of 4.00 million are compared with results of tests of the same wings mounted in a midwing position on a body of revolution of the same axial distribution of crosssection area as the body employed in the present report.Results of the investigation show that only the drag characteristics were significantly affected by a change in the vertical location of the wing, the minimum drag coefficients of the midwing configurations being less than those of the respectivehigh-and low-wing configurations.In general, the maximum lift-drag ratios of the low-wing configurations were less than either the midwing or high-wing configuration.