A TRANSONIC WIND-TUNNEL INVESTIGATION OF THE EFFECTS OF LONGITUDINAL WING LOCATION AND VARYING BODY SIZE ON THE INTERFERENCE CHARACTERISTICS OF A 45° SWEPTBACK WING

摘要

The effects of longitudinal location of the wing anal varying body size on the interference characteristics of a 45° sweptback wing have been investigated over a Mach number range from 0.60 to 1.13 at angles of attack of 0°, 2°, 4°, and 7° in the Langley 8-foot transonic tunnel. The wing had an aspect ratio of 4, a taper ratio of 0.6, and NACA 65A006 airfoil sections. The wing was investigated at two longitudinal loca¬tions, 4 inches apart, on a body. Also, the wing was investigated on two differently sized bodies, one approximately 10 percent larger than the other.nThe results obtained indicated that the zero-lift drag of the wing with interference in the forward position was lower throughout the Mach number range than for the wing with interference in the rearward posi¬tion. The transonic drag rise of the wing with interference for lift coefficients up to 0.4 was reduced up to a Mach number of approximately 1.00 by moving the wing to the forward position. Lift and pitching-moment characteristics were not severely affected by a change in loca¬tion of the wing for the test angle-of-attack range. The increase in body size decreased the, zero-lift drag rise of the wing with interference from 30 to 50 percent in the transonic range and increased the average slope of the lift curve. The pitching-moment characteristics of the wing with interference were not severely affected by the change in body size.