[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3983 : Noise measurements from an ejector suppressor nozzle in the NASA Lewis 9- by 15- foot low speed wind tunnel : Rep.presented at the AIAA 13th aeroacoustics conf.,Oct.22-24,1990,Tallahassee(Fl) / E.A.Krejsa,B.A.Cooper,D.G.Hall,A.Khavaran, 1990. - 59 p. - Текст : непосредственный.
[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3932 : effect of swirl recovery vanes on the cruise noise of an advanced propeller : Rep.presented at the AIAA 13th aeroacoustics conf., Oct.22-24,1990, Tallahassee(Fl) / J.H.Dittmar,D.G.Hall, 1990. - 16 p. - Текст : непосредственный.