[Reports] / Amer.inst.of aeronautics and astronautics. N 88-4494 : Lift defixciency functions for aspect ratio 6,12 and 18 rotor blades from advance ratios of 0 to 0.4 : Rep.presented at AIAA/AHS/ASEE aircraft design, systems and operations meet.Sept.7-9, 1988., Atlanta(Ga) / R.I.Milliken,R.E.Duffy, 1988. - 11 p. - Текст : непосредственный.