FIELD: shipbuilding. SUBSTANCE: mounted coaxially in the longitudinal tunnel of the ship's hull is branch pipe. Blade wheel with radial blades is mounted in the circular space between tunnel walls and branch pipe. Peripheral portion of the Blade wheel is made in form of circular gear wheel located in the tunnel recess. Shipboard engine sets the Blade wheel in rotation through reduction gear. EFFECT: enhanced efficiency of propulsion plant. 2 dwg
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