Steering Gear · Steering Gear
Tug operators rely on powerful steerable thrusters to maneuver their vessels effectively, especially in tight spaces and adverse weather conditions. Wärtsilä offers the WST-21, a steerable thruster designed specifically for the demanding tug market. With propeller diameters ranging from 2,200mm to 2,600mm and power outputs from 1,700kW to 2,100kW, the WST-21 can handle tugs with maximum bollard pull ratings of between 69 and 73 tonnes. This thruster features a larger propeller diameter and a Wärtsilä Thruster Nozzle (WTN) for high bollard pull performance. The hydrodynamic design is optimized using computational fluid dynamics, and the thruster has an Ice class rating up to 1B, making it suitable for use on ice-classed tugs. The WST-21 can be combined with high-speed engines ranging from 1,600kW to 2,550kW and complies with the USA’s EPA VGP 2013 guidelines.
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Source: rivieramm.com · not checked against a manufacturer datasheet
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“1) Based on two installations, 100% power, nozzle designed for bollard pull and 2% thrust deduction 2) In case of ice class notation, maximum power level is reduced”
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