Some wind-tunnel results of an investigation of the flutter of sweptback- and triangular-wing models at Mach number 1.3

F l u t t e r tests of untapered, low-aspect-ratio, sweptback-wing models and of triangular-wing models of s o l i d magnesium, a l u m i , and steel construction have been made i n an intermittent supersonic w i n d tunnel a t Mach number 1.3.F l u t t e r data me presented for 31 sweptback-wing models w i t h 00, 30°, 450, and 60° sweepback' and f o r 24 triangular-wing models.The f l u t t e r boundaries are indicated on p l o t s of s t r e m i s e thickness catio and a s p e c t r a t i o . .No attempt h&s been made t o c o r r e l a t e t h e results with analytical developments.