[Reports] / Amer.inst.of aeronautics and astronautics. N 88-0263 : Noise of a model counterrotation propeller with reduced Aft rotor diametr at simulated takeoff/approach conditions(F7/A3) : Papers presented at 26th aerospace sci.meet., Jan.11-14, 1988, Reno(Nv) / R.P.Woodward,E.B.Gordon, 1987. - 28 p. - Текст : непосредственный.