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DIESEL POWER Latest Developments In Fuel-Efficient Engines -a High fuel costs and lower grades of marine fuel continue to domi- nate the thinking of diesel engine manufacturers as well as vessel owners and designers. Engine designs reflect these con- cerns as diesel manufacturers pro- duce new and modified models ca- pable of burning less fuel, of lower quality, much more efficiently. MARITIME REPORTER asked diesel manufacturers to pro- vide details on the latest develop- ments and designs in fuel-efficient diesels. The following review is based on the replies we received at press time.. Brochures, product literature and technical reports are available, at no cost, on all of the diesel engines surveyed in this article. FOR MORE INFORMATION If you wish to receive additional information on any particular products in the following review, write the corresponding reader service card number(s) on the reader service card in the back of this issue. If you wish to receive informa- tion from all the manufacturers and suppliers of diesel engines and systems included in this review, Write 40 on Reader Service Card AKASAKA Write 41 on Reader Service Card Akasaka Diesels Limited of Japan, a privately owned diesel manufacturing company, has been building diesels for over 70 years. In that time it has built engines totaling six million horsepower. Akasaka has been developing and marketing a new "A" series of engines which bring all the advan- tages of large bore slow speed down to the 1,500-hp to 3,300-hp per engine range. These engines turn from 303 rpm to 218 rpm at continuous service output, and reach fuel efficiencies below .300 lbs/shp in the larger sizes. The Akasaka "A" series are all four-cycle long-stroke engines with the single exhaust valve on each cylinder built in a cage so it can be removed and replaced without re- moving the cylinder head. The low rpm makes them ideal for propul- sion. They can be purchased with direct reversing, and require no reverse reduction gear. Even when used as a generator engine—with a relatively high cost generator at such slow speed—the fact that the engines can burn 1500 to 3500 seconds Redwood fuel at 100 degrees Fahrenheit can off- set the higher capital cost in two or three years of operation. ALCO POWER Write 42 on Reader Service Card Alco Power Inc. has gained val- uable experience in the past year with operation on 400 SRI blended fuel using six of their 16-cylinder 251 engines in river push-boat service on the Lower Mississippi. Due to the lower cost of this fuel compared with normal diesel fuel, considerable reductions in operat- ing costs can be realized. 12 Maritime Reporter/Engineering News
