Page 65: of Maritime Reporter Magazine (February 1988)

PROPULSION

UPDATE

Wartsila Diesel Presents A New

Auxiliary Engine, The Vasa 22/26

The recent introduction of Wart- sila Diesel's Vasa 46 engine is now being followed by a new auxiliary engine, the Wartsila Vasa 22/26. Ac- cording to the analysis made before the Vasa 46 project, a really reliable medium-speed engine is the op- timum choice as the prime mover for virtually any ship type.

The output chart for the Vasa 22/ 26 shows that the four-, six- and eight-cylinder engines comply with the generally accepted output fig- ures for auxiliary engines in general cargo vessels. The engine also meets with most specifications with re- spect to speed range.

Wartsila Diesel has carried out intensive studies on the stroke/bore ratio and found that the ratio 26/22 is optimum for thermal efficiency in engines of this size as well as for reaching a compression ratio high enough to cope with even the next generation of heavy fuels.

A compression ratio of 13:1 in combination with Wartsila Diesel's load dependent cooling system en- sures high compression tempera- tures at all loads. Reliable combus- tion is the result.

The following are the main fac- tors ensuring a reliable combustion in the Vasa 22/26: high compression temperatures at all loads, good atomization of the fuel oil and suffi- cient oxygen supply at all loads.

The engine block of the Vasa 22/ 26 is cast in one piece from nodular cast iron. Rigidity is the main design criterion. The fastening of the cylin- der head screws and the main bear- ing screws into the engine block allows for optimum load distribu- te Vasa 22/26 is Wartsila Diesel's new modern auxiliary engine, designed for safe and reliable operation, tion. This results in negligible changes in the circularity of the main bearing bore and the cylilnder liner spacing, even at peak combus- tion pressures exceeding 200 bar.

The crankshaft of the Vasa 22/26 is forged in one piece with boled-on counterweights on each web. This ensures optimum balancing with su- perb features for an even and high oil film thickness in all bearings.

The connecting rod is drop forged with an H-profile and hydraulically tensioned screws for fastening the bearing cup. Several thousand con- nection rods of this type are now in operation in Wartsila Diesel's en- gines and not a single one with oval- ization of the big end bore or defects in the mating surface has been re- ported.

The piston of the Vasa 22/26 con- sists of a steel crown and a nodular cast iron skirt. The use of two com- pression rings in combination with one oil scraper ring is possible thanks to the patented pressurized lubrication of the piston skirt and the piston design.

A centrifugal casting honed and treated to optimal surface finish and hardness makes for long life. An absolute prerequisite for good cylin- der performance is an optimized cy- linder wall temperature. This is a question of balancing the cooling water temperature, the water flow and the cylinder liner wall thickness in order to prevent the acid attacks which occur at wall temperatures or, the opposite, when excessive tem- peratures burn the lube oil off from the cylinder wall.

Here again, the load-dependent cooling system plays an important role. It allows optimum cylinder temperatures and operational reli- ability at all loads.

Raymond J. Rockwell

Named General Manager

At Advanced Marine m

Raymond J. Rockwell

The appointment of Raymond

J. Rockwell as general manager of

Northeast Operations, Systems

Management Division of Advanced

Marine Enterprises was announced recently by division president

Charles H. Piersall Jr.

Mr. Rockwell has over 28 years' experience in shipbuilding, manu-

Nodular cast iron with high ten- sile strength in combination with a reliable design allows peak combus- tion pressures exceeding 200 bar without significant deformation of the flame plate. By minimizing de- formation—both mechanical and thermal—the risk of deviation be- tween the center line of the valve and seat is avoided. This results in reliable valve-seat function.

The designer of the Vasa 22/26,

Wartsila Diesel, is one of the world's leading designers and manufactur- ers of diesel engines. Besides pro- duction plants located in Finland,

Sweden, Norway, France, Spain and

Singapore, the company also has several licensees and a worldwide network of sales and service facili- ties.

For free literature giving com- plete information on Wartsila Die- sel's new auxiliary engine Vasa 22/ 26,

Circle 32 on Reader Service Card facturing, production and program management. During his past 20 years in acquisition programs he has provided support to 10 Navy pro- gram management offices. He has had direct participation in over 30 shipbuilding programs at 25 ship- builders.

Mr. Rockwell's main office is located in Cherry Hill, N.J.

Donald E. Kadlac Joins

Vessel Charters, Inc.

Vessel Charters, Inc. of New

York, N.Y. has announced that

Donald E. Kadlac recently joined the firm as superintendent engi- neer.

Mr. Kadlac's responsibilities in- clude maintenance and repair of the company's American-flag vessels, vessel seaworthiness and certifica- tion, and supervision of all engineer- ing personnel.

FOR OVER YEARS

Setting the Standard for Service to the Marine Industry

OUR MANY SATISFIED CUSTOMERS INCLUDE: • U.S. AND FOREIGN GOVERNMENT AGENCIES • INDUSTRIAL FIRMS • TUGBOAT OPERATORS • BARGE OPERATORS • FREIGHT LINES • TANKER OPERATORS

When It Comes To Marine Equipment... Come To Us For What You Need

OUR REPUTATION IS YOUR GUARANTEE OF COMPLETE SATISFACTION

J WRITE—WIRE—PHONE

BOSTON METALS CO.

ESTABLISHED 1904

WAREHOUSE: Scott & McHeniySts -Baltimore, MD 21230 • MAIN OFFICE: (301) 539-1900 • TELEX: 197594 ANSWERBACK: B0SIR0N BAL

FAX: (301) 727-5250 • WAREHOUSE: (301) 752-1077—Al Berman (Warehouse Mgr)

February, 1988 69

JON M. LISS ASSOCIATES, INC. 411 BOREL AVENUE, SUITE 505 • POST OFFICE BOX 5554 • SAN MATEO, CALIFORNIA 94402-0554

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VANEAXIALFANS

Delivery

Reconditioning and Rewinding by Dahl Beck Electric.

Available with Warranty. ' (415) 573-9191

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