The Wärtsilä Steerable Thruster (WST) has been developed in parallel with the latest operating demands for tugs, river-going vessels, and various offshore support vessels.
The aim, as with all Wärtsilä products and solutions, is to ensure optimal efficiency, high hydrodynamic performance, less maintenance and better accessibility for serviceability. With eight thruster types, ranging from 700 to 3200 kW, the WST enables these vessels to meet and exceed the performance levels required for today’s competitive operating environment.
Wärtsilä has the broadest and most complete offering of products, systems and integrated solutions in the global marine industry. We continue to lead the way in innovations that create greater efficiencies, improved safety, and more environmental sustainability."
In this white paper, we take a closer look at the different ways in which tugboats propulsion can be improved, and also at Wärtsilä’s next-gen thruster solutions that are designed to improve performance and reduce environmental impact.
Large propellers with a tailored design, a smooth housing shape and slender nozzle connections ensure the superior performance of the Wärtsilä Steerable Thrusters. The hydrodynamic design has been thoroughly optimized, with the use of Wärtsilä’s extensive design experience combined with computational fluid dynamics (CFD) capabilities. Since not all vessel performance requirements are the same, the WST comes with a choice of two nozzle types.
The Wärtsilä Steerable Thruster fits well with Wärtsilä’s own medium-speed engines and is also compatible with high-speed engines of other brands. With a selected range of gear ratios, all common engine speeds between 750 and 1800 rpm can be accommodated, as well as electric motors with speeds between 720 and 1200 rpm.
The thrusters come with an advanced sealing system that includes functionality for seal monitoring. The Wärtsilä Steerable Thrusters are suitable to be operated in US inland and coastal waters under the US EPA VGP2013 regulations. Compliance is achieved by using environmentally acceptable lubricants (EAL).
The newly developed WST thruster series is versatile and can be tailored to comply with specific vessel requirements, without compromising on safety, performance, cost, simplicity, reliability or efficiency."
Multipurpose workboat, pusher tugs, tug boats, small dredgers, platform supply vessels, maintenance vessels and tug-barge (ATB) combinations
Cargo vessels (dry bulk, container, tankers) and inland cruise
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Wärtsilä is a global leader in smart technologies and complete lifecycle solutions for the marine and energy markets. By emphasising sustainable innovation, total efficiency and data analytics, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers.