FIELD: vertical take-off flying vehicles. SUBSTANCE: helicopter includes fuselage, engines, crew cabin, main rotor blades, first circular rim and second circular rim. First circular rim is movably secured on fuselage for turn. First circular rim includes circular slot with rolls secured in it. Second circular rim with main rotor blades articulated in it is received by this slot. Toothed circular track for securing the engines is provided on second circular rim. EFFECT: increased load-carrying capacity; improved structural arrangement; improved mechanical and aerodynamic properties. 9 cl, 2 dwg
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