Wärtsilä Modular Waterjets

The selection graphs indicate the jet size required based on the relation between the engine power and the design speed of the vessel. For instance a ship with four 1250 kW engines and a corresponding vessel speed of 33 knots will need four 510 size waterjets. A ship with a design speed of 40 knots at 1250 kW power can use 450 size waterjets. The correct jet size is thus indicated by the line above the intersection of the power and the corresponding vessel speed (see examples in the graphs below). We are available from the earliest design stages of the vessel to work with you on an optimised propulsion system. Please contact us  for  an  optimised  jet  selection  based  on  specific  vessel  design parameters, operating profile or for details of waterjets above 50 knots or 30 000 kW. DXF/DWG format general arrangement drawings of the most often used sizes are available. Additional design information can be found in the “Waterjets Product guide”, which can be pre-ordered on this page.