FIELD: aeronautical engineering. SUBSTANCE: each dynamic load-bearing member is mounted in framework for free rotation. Diameter of this member is less than linear dimensions of framework by at least one order. Each dynamic member is provided with flexible blades and may be made of tight material to be hermetic at excessive pressure as compared with atmospheric pressure. As shape of dynamic members is concerned, they may be cylindrical and taper and have different diameters forming the preset profile. EFFECT: enhanced aerodynamic properties of device, enhanced efficiency, high safety of flight and reliability of structure. 6 cl, 8 dwg
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