Page 20: of Maritime Reporter Magazine (October 15, 1980)
Review (continued from page 21) 10,700 pounds with standard ac- cessories, but without gear. Fuel consumption is rated at 63 gallons per hour. Service is made easy by individual cylinder heads and re- placeable wet-type liners.
These features convinced John
Wronoski of New London, Conn., to become the first owner to spec- ify the KTA-3076. It will be used in an ocean tug now being built— the latest of many Wronoski boats that have used Cummins power since 1952.
Crabbers, seiners, and trawlers have found the KT-2300-M to be the answer to their power needs since it was introduced in 1979,
Cummins reports, but 1980 marks the first use of this model diesel on the inland waterways. In July this year the Jeanne Marie, a switchboat plying the St. Louis area for Archway Fleeting and
Towing Services, became the first new inland boat powered by the 11,700-pound engine.
The KT-2300-M is rated 700 bhp at 1,800 rpm, while the after- cooled model produces 940 bhp at 1,800 rpm during continuous duty.
Both engines feature the same easy maintenance characteristics as the KTA-3067.
Archway's manager of opera- tions David Houlihan thinks the
KT-2300-M can respond to the challenge of quick pivots and
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Shear force and bending moment graphic display
Ship mimic diagram and mimic tonnage displays
Shear force and bending moment point "fine" display select buttons
Optional tank capacitv table
Draft aft display
Power "on-off" key switch
Operating mode control switches • lightship • self-test • port condition • run
Shear force and bending moment numeric "fine" displays Shear force and bending moment graphic display select switch
Draft forward display
Entry keyboard display
Special function kevs
Computer printout (optional) swift floodstage currents better than smaller engines that are commonly used in switching op- erations. He also was impressed by the fuel consumption advan- tages the KT-2300 had over com- peting engines. "We project an annual fuel savings of $80,000 using the Cummins engine," he said in comparing the KT-2300 with its nearest competitor.
The VT-555-M is a new engine designed for twin-screw applica- tions in pleasure and sport fishing craft. It features the highest horsepower to weight ratio of any engine in its class, according to Cummins. The turbocharged, 555-cubic-inch V-8 engine is rated 320 bhp at 3,000 rpm, an 18-per- cent improvement over the 270- bhp VT-555-M offered by Cum- mins.
A larger camshaft and higher capacity heat exchanger system are responsible for the horsepow- er improvement and for a five per- cent improvement in fuel economy over the previous model, the com- pany said.
Detroit Diesel Allison
This division of General Motors
Corporation, located in Detroit, has been providing reliable and durable diesel power to the marine industry for more than four dec- ades. DDA offers more than 53 marine diesel engine models cov- ering a power range from 100 to over 1,100 continuous shaft horse- power (net power available at the marine gear output shaft). All
Detroit diesels provide excellent horsepower-to-weight ratios.
Detroit diesels are available in in-line or V-type configurations to fit almost any hull plan. A total of six low-profile configurations are offered to accommodate en- gine compartments with limited overhead clearances.
DDA's ability to provide right- and left-hand engine rotation per- mits port and starboard rotations with all marine gear designs.
These "mirror image" matched in-line engine pairs are the ideal power for twin-screw installations.
Marine engine models are of- fered in four engine series — the 53, 71, 92, and 149 Series — each named for the cubic-inch dis- placement per cylinder. The Series 53 marine line consists of 4-cyl- inder in-line and 6-cylinder V-type models.
Naturally aspirated and turbo- charged versions of Series 71 De- troit Diesel engines have long been the standard marine engines around the world, beginning with the 71s that powered Allied Navy landing craft during World War
II. The Series 71 marine line is offered in 4- and 6-cylinder in-line models; 6-V, 8-V, 12-V, and 16-V models also are available. Most are available in naturally aspir- ated and turbocharged/intercooled configurations.
The DDA 12V-71 marine en- gine has proven to be extremely (continued on page 24) 36 Maritime Reporter/Engineering News