[Reports] / Amer.inst.of aeronautics and astronautics. N 87-2747 : prediction of helicopter tail rotor noise on the flight path : Papers presented at AIAA 11th aeroacoustics conf., Oct.19-21, 1987, Palo Alto(Ca) / S.A.L.Glegg, 1987. - 6 p. - Текст : непосредственный.