Page 90: of Maritime Reporter Magazine (April 1997)

PROPULSION UPDATE

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New Sulzer Offers Mere Cempact Versions Of RTA-2U

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NEW CONSTRUCTION

Hwy. 90 East L

P.O. Box 1190 PH. 318/824-2210

Jennings, LA 70546 FAX 318/824-2970

New Sulzer Diesel Ltd. has introduced improved versions of its Sulzer RTA52U,

RTA62U and RTA72U low-speed marine diesel engines. All new versions are shorter and lighter than the original designs, and each has been modernized with respect to installation ease onboard ships. Installation work is reduced through the use of fewer holding- down bolts on the engines, and also by improv- ing access to them.

In addition, the crankshaft has been given wider webs to further reduce stresses.

However, it is key to note that there has been no change in any of the engines main parame- ters, including power, speed and consumption.

The modernized RTA-2U engines are desig-

Circle 256 on Reader Service Card

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Circle 258 on Reader Service Card

Circle 260 on Reader Service Card

Circle 259 on Reader Service Card

Circle 261 on Reader Service Card

LEEVAC

SHIPYARDS, INC.

CONVERSIONS

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DRYDOCKIN /ESSELS

BARGES

SPECIALTY VESSELS

Circle 257 on Reader Service Card nated the B versions in the technical documen- tation to distinguish them from the original designs. They incorporate many detailed design solutions from the RTA-T series, fea- tures that have already been well received by engine builders as well as shipbuilders.

The most visible change is the reduction in engine length of 255 mu^fWlthe RTA72U engines, 214 mm for ike RT^A62jP and 175 mm for the RTA52U^HFhfs<^bre equivalent to a reduction ofcuWit/^t percent in length of the befcj^hig^ed by r^desi|rnt^^l after end of thefer^ne with d^glWAiecr thrust bearing.

The ~shorteMttu^urti*mso allowed the after- most Uti^od^Mpr omitted. The engines are now the same electronically con- trolled ^Mnder lubrication system as the RTA-

T engine series.

The multi-level accumulator system is retained, but it is served by lubricating pumps driven by a frequency controlled electric motor.

Local oil distributors on each cylinder are designed to considerably reduce the number of pipes required.

The engine weights have been reduced by 15 tons for the RTA72U, 10 tons for the RTA62U and five tons for the RTA52U. The RTA-2U version B engines will be designed to meet planned IMO limits for NOx exhaust emissions without additional equipment.

For more information on the technical specifications of the new engines

Circle 32 on Reader Service Card

Maritime Reporter/Engineering News