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The Workboat Annual The New Wartsila 46F The Wartsila 46F is the latest in the marine engine series launched in 1987. Though visually similar to the original Wartsila 46, with similar bore and stroke, the Wartsila 46F is a new engine with the latest technology applied to all major components, including common rail injection and scaleable embedded control, for high performance and record-low exhaust emissions, regard- less of fuel quality. The new engine initially covers the output range from 7,500 to 11,250 kW at 600 rpm in 6-, 7-, 8- and 9-cylinder in- line configurations. The higher (1,250 kW cylinder) output of the Wartsila 46F compared to the original Vasa 46 has been achieved by increasing engine speed instead of mean effective pressure. In full-load opera- tion, early closure of the inlet valves makes it possible to use a low effective compression ratio, resulting in a work- cycle characterized by low combustion air temperature, which is designed to keep the rate of NOx formation low. In keeping with tradition, the Wartsila 46F has modular built-on systems and features such as lubricating oil module with oil cooler and filter, crankshaft driven lubricating oil pump and cooling engine's compact design; the new water pumps, and thermostatic valves. Wartsila 46F has the same outer dimen- Besides minimizing installation cost, sions as the Vasa 46 despite its consider- built-on modules are the key to the ably higher power output. (Continued on page 43) $&OmniTHRUSTHtM Murine Maneuvering and Propulsion Systems If you can dream it We can do it! Water Jet Bow/Stern Thrusters 75-2200 HP JT575AM • Low Submergence Requirement • Small Hull Penetrations Auxiliary Propulsion/ "Take Home" Capability • Effective Thrust In Currents • Proudly Made WM tSBlBBS&mimmmmsmmm: In The USA! HT600 30555 Solon Industrial Parkway • Cleveland, OH 44139 440 542-0200 www.amnithruster.com Phone: (985) 631-2628 • (985) 631-3513 Email: seacraft@seacraftshipvard.com www.seacraftshipayrd.com Circle 289 on Reader Service Card November 2004 Circle 306 on Reader Service Card 41 A full service shipyard providing fast turnarounds and quality workmanship at competitive prices since 1955 specializing in repairs, conversion and construction of all types of aluminum and steel vessels. SEACRAFT SHIPYARD CORPORATION P.O. Box 1550 3820 Lake Palourde Road Amelia, LA 70340 •Repairs •Conversion •Blasting/Painting •Vessel Brokerage •USCG/ABS Inspections •Hull Lengthening •Repowers
