A transonic wind-tunnel investigation of the effects of twist and camber with and without incidence, twist and body indentation on the aerodynamic characteristics of a 45 degree sweptback wing-body configuration

A transonic w i n d -t u n n e l investigation of several sweptback wingbody ,canfigura;tions has been made t o determine t h e effects of twist and caber with incidence, t h e separate effects of twist without c a b e r , and the influence of body indentation on t h e effects of twist and camber, and twist alone.-0 Canpaxisons of the results of this investigation with those obtained for ccnrrparable plane wbg-body configurations shared: Negative incidence improved the values of maxinnrm lift-drag ratios f o r the twisted and cambered wing-body configuration throughout the t e s t Mach number range.W effects of twist on the values of rnaxbnm lift-drag ratios, h mever, were small when canpazed with those of twist and camber.M e t i n g and cambering the wing increased the l i f t coefficient at wMch the unstable break in the pitching-mment curves occurred by ap-groxirmately twice the amount of that for twist alone.Bow indentation increased the values of m a x h u n Wt-drag ratios for t h e twisted and cambered w i n gbody configuration at Mach nwnber8 between 0.9 and 1.15 and increased the values of maximum Uft-drag ratios f o r the twisted wing-body configuration through Mach nunher 1 .O3.The effects of twist and camber and body indentation at lift coefficients for maxbnm lift-drag ratios are additive at Mach numbers abwe 0.96. .The results of reference 1 indicated that M e t and c a b e r increased t h e m e x i m u m lift-drag ratios of a 45O sweptback wing-curved-body I