[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3993 : Radiation integrals for sound generation by the lighthill quadrupoles in propeller acoustics : Rep.presented at AIAA 13th aeroacoustics conf.,Oct.22-24, 1990, Tallahassee(Fl) / N.Peake,D.G.Crighton, 1990. - 13 p. - Текст : непосредственный.
[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3998 : approximate method for the prediction of propeller near-field effects : Rep.presented at the AIAA 13th aeroacoustics conf.,Oct.22-24,1990,Tallahassee(Fl) / W.K.Boyd,N.Peake, 1990. - 12 p. - Текст : непосредственный.