Page 88: of Maritime Reporter Magazine (May 1994)

MAN B&W Crosshead A Contender

In The Medium-Speed Market

Assembly of the first 8S35MC engine.

MAN B&W held a conference in Frederikshavn on April 12 for the presentation and test run of the first MC engine type S35. International

Editor Graeme MacLennan reports from Den- mark.

MAN B&W has added another model to its portfolio of crosshead engines. The S35MC is a longer-stroke version of the L35MC, which has proved to be among the best-selling engines of its power range in the Far East.

In contrast, the S35MC is aimed at the world market, and MAN B&W foresees these engines as powerful competitors in the range of outputs where the geared medium-speed four-stroke, trunk-piston engines presently reigns supreme.

The 170 rpm running speed is a much better match for the slower-running propellers which are demanded today and which, with suitable reduction gearing, the medium-speed engine can so readily satisfy.

The taller crosshead engine is not, of course, suited to all those applications, for instance where a through main deck at a relatively low level is essential, as in RoRo trailer and car ferries, but it can offer many advantages for container feeder ships where the short length of the engine and absence of a gearbox may enable perhaps another 20-ft. box to be accommodated within a finite ship length. Coastal and chemical

Boston Whaler's New Impact Design

Reported A Success

Since its introduction last fall, Boston Whaler

Inc.'s 21-foot (6.4-m) Impact has met with suc- cess, capturing sales ranging from international, federal, state and city agencies to commercial and recreational applications.

The Impact resembles a rigid inflatable boat, but Boston Whaler claims the Impact will never deflate, is virtually unsinkable, and comes with a 10-year limited warranty The Impact features a foam collar which facilitates the boarding of vessels even while underway. The collaring system cushions the shock associated with mak- ing contact with other boats or structures with- out marring the other surface. "The State of

Florida has four Impacts on order and the State of Utah has already accepted delivery with an- other unit on order," said Doug Nettles, of

Boston Whaler. The fendering system also re- portedly attracted the attention of mega-yacht owners, and the Impact can be customized to match the decor of any vessel.

For more information on Boston Whaler,

Circle 42 on Reader Service Card tankers, particularly ships and research vessels, are applications in which particular advantages can apply; indeed the first order is for a 17,500- dwt product tanker under construction in

Singapore.

The model has many components in common with the L35MC, is the same length, about 35.5 inches (900mm) higher and slightly heavier.

The bedplate, framebox, cylinder liner, piston and connecting rods are altered to accommodate the longer piston stroke and crankthrow, but otherwise the configuration is the same as be- fore.

Constant- or variable-speed generators, ac- cording to whether controllable or fixed-pitch propellers are specified, can be attached forward or aft of the engine. As with the other models from the Frederikshavn factory, the engine can be supplied as part of an Alpha Diesel propulsion package, complete with shafting, propeller, gen- erator PTO drive and Alphatronic controls.

Lubricating oil consumption is lower since the quantities applied to the cylinder liners are controlled, and the periods between scheduled overhauls are longer. The running gear is more accessible and maintenance can be undertaken by less skilled operators. Noise and No levels are lower than faster-running, highly-raled en- gines. The S35MC is offered with from four to 12 cylinders, covering a range of powers from 2,800 kW (3,800 bhp) to 8,400 kW (11,400 bhp) at the

CALENDAR

JUNE

Large Marine Sealed Bid Sale:

S.C. Loveland Co., Inc.; Bid Deadline: Tuesday,

June 14th, noon. Contact: Sealed Bid Services,

Inc., 1044 Bethlehem Pike, Montgomeryville,

Pa. 18936; tel: (215) 542-7787.

AUGUST

NorFishing '94 Exhibition and Seminars:

August 9-13, Trondheim, Norway

Contact: The NorFishing Foundation,

Nidarohallene, N-7030 Trondheim, Norway, tel: +47 73 92 93 40; fax: +47 73 51 61 35.

Offshore Northern Seas (ONS) '94: August 23-26, Stavanger, Norway

Contact: ONS, P.O. Box 410, N-4001 Stavanger,

Norway, tel: +47 5155 8100; fax: +47 5155 1015.

SEPTEMBER

AWO Fall Convention: September 8-9,

Fairmont Hotel, San Francisco, Calif.

Contact: The American Waterways Operators, 1600 Wilson Boulevard, Arlington, Va. 22209, tel: (703) 841-9300; fax: (703) 841-0389.

World Gaming Congress & Expo: September 26-28, Las Vegas Convention Center, Las Vegas,

Nevada

Contact: World Gaming Congress & Expo, Gam- ing & Wagering Business, Seven Penn Plaza,

New York, N.Y. 10001-3900, tel: (212) 594-4120 or 1-800-223-9638; fax: (212) 714-0514.

Shipbuilding Machinery & Marine Tech- maximum 170 rpm L rating and a specific fuel consumption of 175g/kW-h (129g/bhp-h), falling to the 475 kW/cylinder L rating at 145 rpm when the SFC is 170g/kW-h. For more information on the engine from MAN B&W,

Circle 156 on Reader Service Card nology Exhibition & Conference: Sept. 27-

Oct. 1, Hamburg, Germany

Contact: tel: +49 40 3569 2146; fax: +49 40 35 69 2149

OCTOBER

Fish Expo <94: October 13-15, World Trade

Center, 164 Northern Ave., Boston, Mass.

Contact: Diversified Expositions, 5 Milk Street,

Portland, Me. 04112, tel: (207) 772-3005; fax: (207) 772-5059.

International Tug, Towage & Salvage Con- vention & Exhibition (ITS <94): October 17-21,

Grand Harbour Hotel, Southampton, U.K.

Contact: Allan Brunton-Reed, managing di- rector, The ABR Company Limited, Dunelm,

Church Road, Claygate, Esher, Surrey KTIOO JP,

U.K., tel: +44 372 468 387; fax: +44 372 468 388.

NOVEMBER

The International WorkBoat Show: Novem- ber 3-5, Ernest N. Morial Convention Center,

New Orleans, La.

Contact: Diversified Expositions, 5 Milk Street,

Portland, Me. 04112, tel: (207) 772-3005; fax: (207) 772-5059.

Ship Repair & Conversion '94: November 8-9,

Olympia 2, London

Contact: John Gwynn-Jones or Jon Chaplin, tel: +44 923 776363; fax: +44 923 777206.

SNAME 1994 Annual Meeting and Interna- tional Maritime Exposition: November 16-19,

New Orleans, La.

Contact: Tel: (201) 798-4800. 92 Maritime Reporter/Engineering News