Horizontal-Tail Effectiveness and Downwash Surveys for Two 47.7 Degree Sweptback Wing-Fuselage Combinations With Aspect Ratios of 5.1 and 6.0 at a Reynolds Number of 6.0 X 10(Exp 6)

Report presenting an experimental investigation of the effectiveness of a horizontal tail on two 47.7 degree sweptback wing-fuselage combinations of aspect ratios 5.1 and 6.0. Various combinations of components were tested, including leading-edge flaps, drooped-nose, split flaps, and double slotted flaps, in addition to the flaps-neutral configuration. The primary purpose of the study was to determine the longitudinal stability characteristics of these wings in combination with the fuselage and tail and to determine if the tail is effective in overcoming the unstable variations in pitching moment prior to maximum lift.