FIELD: shipbuilding; marine bladed propulsors: coaxial propellers of opposite rotation. SUBSTANCE: at least blades of aft propeller are movably secured in hub. Each blade is mounted for rotation on axle running through root of blade in parallel with propeller shaft axis. Hub is provided with slots in plane of propeller disk where roots of blades are located. Each root of blade is immovably secured on respective axle which is movably mounted in slot. Blades of propellers are mounted for turn through angle of ± 10 deg. EFFECT: reduced level of pressure fluctuations on ship s hull; reduced intermittent hydrodynamic forces on propellers; enhanced efficiency of propulsors in off-standard modes. 2 cl, 3 dwg
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