[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3953 : Near-field noise of a single-rotation propfan at an angle of attack : Rep.presented at the AIAA 13th aeroacoustics conf.,Oct.22-24,1990,Tallahassee(Fl) / M.Nallasamy,E.Envia,B.J.Clark,J.F.Groeneweg, 1990. - 17 p. - Текст : непосредственный.