WIND-TUNNEL INVESTIGATION OF SPLIT TRAILING-EDGE LIFT AND TRIM FLAPS ON A TAPERED WING WITH 23° SWEEPBACK

摘要

Results of force tests and presfiure-distribution measurements are presented from a wind—tunnel investigation to determine the effects of size and hinge location of lift and trim flaps on the lift and pitchingranament characteristics of a semispan tapered wing with 23° sweepback of the quartern-chord line. The flaps tested were split flaps with chords of 10, 20, 30, and 4O percent of the wing chord. The spans of the lift flaps were 20, 40, 60, 80, and 100 percent of the wing span;the spans of the trim flaps were 10, 20, 40, and 60 percent of the wing span. The flaps were tested with the hinge axes at several different chordwise locations.