Effects of three spanwise twist variations on the longitudinal aerodynamic characteristics of a thin 45 deg sweptback highly tapered wing at transonic speeds

Tests were conducted a t transonic speeds on four wings: an untwisted wing t o serve as a reference, and wings with l i n e a r , quadratic, and cubic t w i s t v a r i a t i o n s across t h e span.a t 10 percent of t h e semispan and 6' washout a t t h e t i p .ered a Mach number range from 0.80 t o 1.20 and angle-of-attack range from -bo t o 20'.phere which corresponded t o Reynolds numbers of about 1.4 x 106 and 2.8 x lo6 based on t h e wing mean aerodynamic chord, respectively.wings have an aspect r a t i o of 4, taper r a t i o of 0.15, and 45' sweepback of t h e quarter-chord l i n e .The wings were cambered and had a thickened root s e c t ion.