FIELD: aircraft engineering.
SUBSTANCE: claimed aircraft comprises fuselage, wing, tail unit and propeller assembly including engine, transmission and aligned counterrotation propellers. Propeller blades are composed of flexible bands with 4…200 extension, their roots being secured at time-rotation drums and ends being composed of centrifugal streamlined weights with rigidly fixed or controlled aerodynamic rudders. Propeller mid sections as-folded do not exceed that of aircraft fuselage. Elastic coating composed of aerodynamic profile can be applied on said band from its end section and to over at least 25% of the blade length.
EFFECT: increased midflight path of high-altitude aircraft.
5 cl, 4 dwg
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