[Reports] / Amer.inst.of aeronautics and astronautics. N 89-1069 : Airfoil profile drag increase due to acoustic excitation : Rep. presented at the AIAA 12th aeroacoustics conf., Apr.10-12, 1989, San Antonio(Tx) / J.Shearin,M.Jones, 1989. - 6 p. - Текст : непосредственный.