1278516991595a1267106724867-brochure-o-wartsila-solutions-2015

WATERJETSWaterjet size selectionThe selection graphs indicate the jet size required based on the relationbetween the engine power and the design speed of the vessel. Forinstance a ship with four 1 250 kW engines and a corresponding vesselspeed of 33 knots will need four 510 size waterjets. A ship with a designspeed of 40 knots at 1 250 kW power can use 450 size waterjets. Thecorrect jet size is thus indicated by the line above the intersection ofthe power and the corresponding vessel speed.We are available from the earliest design stages of the vessel towork with you on an optimised propulsion system. Please contact usfor an optimised jet selection based on specific vessel designparameters, operating profile or for details of waterjets above 50 knotsor 30 000 kW. DXF/DWG format general arrangement drawings of themost often used sizes are available.ApplicationThe characteristics of a waterjet make it a good propulsor for severaltypes of applications.• z High speed vessels; waterjets have better propulsion efficiency atship speeds over 25–30 knots.• z Shallow draft vessels; the integrated steering function providesbenefits for rescue vessels, inshore passenger ferries, landingcrafts & special work boats.• z High power density; the pressure built-up in the waterjet inletallows small dimensions.• z Maneuverability; waterjets have integrated steering and reversingwith quick response times.153