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mercial fishing vessels, a wide choice of marine gears to suit most any requirement, and the re- nowned J & T parts and service backup are available from John- son & Towers of Mt. Laurel, N.J., marine diesel specialists estab- lished in 1926. This prestigious firm, known for its innovative engineering in ma- rine diesel power, is a distributor of Isuzu diesel engines 15-150 bhp; the full range of Detroit Die- sel engines from the 4—53 and 8.2-liter natural up the 1,000-bhp 12V-92TI and 1,600-bhp 16V-149TI; and the full line of Alco diesels up to 4,000 bhp. J & T was recently appointed a distributor to the high-quality, lightweight, aluminum-cased ZF marine gear from West Germany. In addition, the firm offers Allison, Twin Disc, Capitol, Borg Warner, and Niigata gears. With facilities in Mount Laurel and Wildwood, N.J., and Balti- more, Cambridge, and Beltsville, Md., J & T stocks new and rebuilt engines and gears, maintains a huge inventory of parts, and has a large staff of factory-trained me- chanics noted for prompt expert service at J & T or in the field. KHD-DEUTZ Circle 25 on Reader Service Card A research and development project titled The Ship of the Fu- ture, sponsored by the Federal German Minister for Research and Technology, is intended to im- prove the West German shipbuild- ing industry's chances in the face of international competition. Indi- vidual parts of this broad en- deavor have been awarded to the shipyard's suppliers. KHD-Deutz has been selected to carry out an R&D project on the optimization of the combustion process in medium-speed, four- stroke diesel engines. The devel- opment goals are: reduce fuel con- sumption, equip engine to burn cheap heavy fuel oil of ever poorer quality. The results achieved on the one- cylinder BV1M 540 experimental engine have also been verified by using BV6M 540 and BV8M 540 engines with different turbocharg- ing systems. At one point chosen for comparison at which the BVM 540 engines were producing rela- tively good operating results, it was possible to reduce specific fuel consumption further on the BV1M by making the following modifica- tions: raising injection pressure by 90 percent; reducing the duration of injection by 30 percent; using optimized injection nozzles; rais- ing firing pressure by 10 percent; and increasing the amount of ex- cess air present during combustion by seven percent. When certain development steps were applied to the two multi- cylinder engines, most of the re- sults were verified. Thus, the de- velopment work done as part of the Ship of the Future research project comprises an important step towards maintaining the competi- tiveness of the medium-speed, 4-stroke diesel engine. KRUPP MAK Circle 26 on Reader Service Card Fuel consumption in marine en- gines has been effectively reduced without affecting performance. Shipowners using Krupp MaK en- gines can save up to $160,000 at present world prices in fuel costs annually. Fuel consumption is re- duced 10 percent in the most pow- erful MaK engine, the M 601 with a cylinder output of 1,000 kw (1,341 bhp). This calculation was based on 300 sea or operational days, using the engines at 85 per- cent of mcr and burning residual oil with a viscosity of at least 380 cSt/50 C or more. The assessment of the economic viability of a diesel engine for ship propulsion is currently measured by the most important parameter, the specific fuel consumption, fol- lowed by reliability and an ability to handle heavy fuel oil. According to this, for a number of years every effort has been made to re- duce consumption so as to make the profitability of a ship's propul- sion unit independent of other fac- (continued on page 32) We'll match our ship repair people and our shipyard against anybody. Anywhere. Anytime. ?wpoi Shipbuilding is the world's largest, most diversified yard.. .also the most experienced. We've Got The Reople: More than 28,000 skilled men and women. We've Got The Space: 8 piers for berthing ships to 1200 feet, dry docks from 650 to 1600 feet. We can dock fully loaded container ships, jumboize tankers, renovate or repair every aspect of any ves- sel. . .cruise ship, tanker, prod- uct carrier, or specialty cargo. turnaround, an unpar- alleled steel fabrication center, a complete materials testing laboratory, a world famous school for training our own code welders. We have been serving the We've Got The Facilities: A 300,000 square foot ma- chine shop, a foundry that can pour practically any marine casting we need with very short viable record of fast turnaround ... our quality workmanship, our competitive prices. It explains why so many ship owners and operators rate Newport News number one. Newport News Shipbuilding. Newport News, Virginia 23607. (804) 380-2600/Telex 82-3453 TWX 710-880-0007. Newport News Shipbuilding A Tenneco Company July 1,1984 Circle 113 on Reader Service Card 31
