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DU Sulzer 6RTA48T PDF

The document summarizes Sulzer's RTA-T series of low-speed marine diesel engines. It introduces the RTA-T line which includes the RTA48T, RTA58T, RTA68T, and RTA84T engine types covering 4375-34920 kW. The RTA48T, RTA58T, and RTA68T engines (the RTA-8T types) are designed for economical propulsion of tankers and bulk carriers from 20,000 to 300,000 tons. The first RTA48T engines entered service in 1997 and accumulated over 5,000 running hours with maximum liner wear rates of only 0.012 mm/1000 hours, confirming the

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2K views1 page

DU Sulzer 6RTA48T PDF

The document summarizes Sulzer's RTA-T series of low-speed marine diesel engines. It introduces the RTA-T line which includes the RTA48T, RTA58T, RTA68T, and RTA84T engine types covering 4375-34920 kW. The RTA48T, RTA58T, and RTA68T engines (the RTA-8T types) are designed for economical propulsion of tankers and bulk carriers from 20,000 to 300,000 tons. The first RTA48T engines entered service in 1997 and accumulated over 5,000 running hours with maximum liner wear rates of only 0.012 mm/1000 hours, confirming the

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Rizky Dwi Taruna
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© © All Rights Reserved
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Introduction

Since its introduction some 16 years ago, the as well as on the outcome of close discussions with
well-known Sulzer RTA series of low-speed marine shipyards and shipowners about their requirements.
two-stroke crosshead diesel engines has been con- The RTA-T engines are thus today the most
tinuously updated to adapt it to the latest market modern, manufacturing friendly and reliable ‘work-
requirements and to incorporate the benefits of horses’ for bulk carriers and tankers.
technical developments. It now comprises engines The RTA-T line comprises four engine types, the
from 380 to 960 mm bore covering a power range RTA48T, RTA58T, RTA68T and RTA84T, which cover a
of 1480 to 65 880 kW (2000–89 640 bhp). Within power range of 4375–34 920 kW (5950–47 520 bhp)
this series, there are three main lines of engines – the at speeds of 127–54 rev/min (Fig. 2). The first RTA84T
RTA-C, RTA-U and RTA-T engines – characterised by entered service operation in 1994 and had accumul-
their respective stroke/bore ratios of less than 3.0, ated some 28 000 running hours at the end of 1997.
about 3.5 and around 4.0. The RTA84T type, however, is not included in the
Of these three lines, the RTA-T is purpose de- coverage of this paper because it has a design
signed for the economical propulsion of tankers concept that is distinctively different to the other
and bulk carriers from 20 000 to 300 000 tdw, or three types. The three smaller-bore RTA-T engines,
more. The RTA-T engines offer clear, substantial namely the RTA48T, RTA58T and RTA68T, are collec-
benefits in ship operation, as well as for shipbuilders tively termed the RTA-8T engines.
and engine builders. Particular mention can made of The first two RTA48T engines went into service at
their unparalleled compact dimensions, ease of in- the beginning of 1997 (only about one and a half
stallation, ideal matching for power and speed, and years after the engine’s announcement), and each
manufacturing-friendly design, together with their had accumulated more than 5000 running hours at
objective of long times between overhauls based on the end of January 1998. Inspections carried out so
the solid background of the service experience from far confirmed that the RTA48T engines are running to
the many RTA-series engines in service. The engine our full satisfaction, with maximum diametrical liner
design is based on the well-proven RTA-U engines wear rates of only 0.012 mm/1000 hours.

RTA48T RTA58T RTA68T

Fig. 2
Cross sections of the three engine types in the Sulzer RTA-8T engine family, the RTA48T, RTA58T and RTA68T to
approximately similar scales
[97#222-1]

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