4.DFUIG 1.NTERFERENCE BETWEEN A POINTED CYLINDRICAL BODY AM) " TRIANGULAR WINGS OF VARIOUS ASPECT FiATIOS

In order to investigate the effects of drag interference on wing-body combinations, tests were conducted at Mach numbers of 1.30 and 2.02 with. a pointed cylindrical body, with six triangular wings having aspect ratios from 0.67 to 4.00, and with the wings and the body in combination. Experimental drag results were obtained for a nominal angle-of-attack range of +5.3O and a constant Reynolds number of 5.5 million based on the body length. The characteristics of the body, the wings, the combinations, and the wing-body interference were calcu-lated from the available theories and compared with the experimental results. The minimum drag coefficients of the body alone, as calculated by the method of characteristics with laminar and. turbulent skin-friction coefficients added for the body in a smooth condition and with fixed transition, were in good agreement with the experimental values. The drag rise with angle of attack, as ca1culated.b ~ the method of NAC