LIFT AND PITCHING-MOMENT INTERFERENCE BETWEEN A POINTED CYLINDRICAL BODY AND TRIANGULAR WINGS OF VARIOUS ASPECT RATIOS AT MACH NUMBERS OF 1.50 AND 2.02

摘要

In. order to investigate the effects of interference on wing-body combinations, tests were conducted at Mach numbers of 1.50 and 2.02 of a pointed, cylindrical body of six triangular wings having aspect ratios from O.67 to 4.00, and of the wings and the body in combination. The body had a fineness ratio of 7.33, a conical nose with a semiapex angle of 15°, and an ogival transition section to a cylindrical afterbody. The wings had 8-percent-thick double-wedge sections with the maximum thickness at the midchord, and the wing-body combinations were made by inserting the wings at zero incidence into the cylindrical part of the body. Experimental lift and pitching-moment results were obtained for a nominal angle-of-attack range of ±5.5° and a constant Reynolds number, based on the body length, of 5.5 million. Theoretical characteristics of the body and wings alone and in combination, as well as the interference, were calculated from the available theories and compared with the experimental results.