[Reports] / Amer.inst.of aeronautics and astronautics. N 89-2580 : Configuration studies for a regional airliner using open-rotor ultra-high-bypass-ratio engines : Rep. presented at the AIAA/ASME/SAE/ASEE 25th joint propulsion conf., Monterey(Ca), July 10-12, 1989 / B.Fischer,H.G.Klug, 1989. - 7 p. - Текст : непосредственный.