Wärtsilä Modular Waterjets

The characteristics of a waterjet make it a good propulsor for numerous applications.

• High speed vessels; waterjets have better propulsion efficiency at ship speeds over 25-30 knots.
• Shallow draft vessels; the integrated steering function provides benefits for rescue vessels, inshore passenger ferries, landing crafts & special work boats.
• High power density; the pressure built-up in the waterjet inlet allows small dimensions.
• Maneuverability; waterjets have integrated steering and reversing with quick response times.

Examples of such applications include:

• Fast ferries
• Littoral combat ships
• Fast patrol boats
• Rescue vessels
• Fast yachts
• Fast supply vessels and workboats
• Landing craft

Wärtsilä axial waterjets are single stage, compact, high performance systems that combine mixed flow properties with an axial construction. This results in much less space being needed on the vessel’s transom, and greatly increased waterjet cavitation margins for optimum vessel operational flexibility. For naval architects, the axial jet technology creates the possibility to apply a larger power density onto narrower hulls in order to achieve top vessel performance.

• Lowest size to weight ratio in the market
• Axial pump design means less space on the transom
• Worldwide availability, including China, Japan, Korea, etc.
• Inboard mounted thrust bearing block, for increased life and easy maintenance
• Best performance in the market based on more than 35 years of waterjet experience
• High-performance components in Duplex stainless steel to prevent wear and corrosion
• Impeller tip clearance guaranteed due to axial shape and no risk of impeller housing collisions