Orders Grow For MAN B&W Diesel's 'Mini-Bore' S26MC Engine
The merits of MAN B&W Diesel's "mini-bore" S26MC low-speed engine are being appreciated by a growing number of designers and operators of small-to-medium sized ships in varied inland, coastal and deepsea trades.
The 260-mm bore/980-m stroke design was introduced to extend the economic and technical advantages of the MC two-stroke engine series to vessels which before had been restricted to geared four-stroke propulsion machinery. The S26MC range consists of 4 to 8-cylinder models offering outputs up to 3970 bhp at 250 rpm, allowing direct coupling to a cp or fixed-pitch propeller.
The overall operational qualities of the design—notably high reliabil- ity, low maintenance demands and impressive fuel economy on cheaper bunkers—have so far attracted orders for 41 engines totaling 118,488 bhp from owners/yards worldwide.
The reference list includes dry cargo ships and tankers, and excellent service experience is reported from the 19 engines already at sea.
Typical applications for the compact S26MC-based propulsion plant are illustrated by the following recent installations: •Mekhanik Makarin, the first of 10 river/seagoing timber carriers ordered for the Soviet Union's Northern Shipping Company from Austria's Oswag yard. Each 2,500-dwt shallow draft vessel is specified with a 6-cylinder S26MC engine developing 2,820 bhp at 237 rpm and driv- ing a cp propeller for a service speed of 12.6 knots. The engines, supplied by USSR licensee Bryansk, are also arranged to drive a 265-kw shaft alternator. The multipurpose icegoing ships will be deployed from the owner's Archangel base.
•Three 3,400-dwt/270 TEU multipurpose cargo/containerships entering service with Stateships of Western Australia from Australian Shipbuilding Industries. Each is powered by a derated 6-cylinder S26MC engine with a rating of 2,230 bhp at 188 rpm, driving a cp propeller and a 450-kw shaft alternator.
The 13-knot vessels are designed for operation in Australian and Southeast Asian services.
•Three 2,800-dwt/170,000-cubicfoot refrigerated cargoships completing at the Aarhus Dockyard Ltd.
in Denmark for deployment with Copenhagen Reefers. Propulsion power is provided by a 6-cylinder S26MC engine developing 2,970 bhp at 250 rpm, which is arranged to drive a cp propeller and a 500-kw shaft alternator.
MAN B&W Alpha Diesel A/S of Frederikshavn, Denmark, which is geared up for the competitive production of smaller bore MC models, is delivering the propulsion packages for the Stateships and Copenhagen Reefers newbuildings. Each tailored package includes the S26MC engine, shafting, cp propeller and Alphatronic remote control system.
Overall sales of the MC series now number 1,822 engines aggregating some 24,401,000 bhp.
For free literature giving more information on MAN B&W Diesel engines, Circle 16 on Reader Service Card
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