New Two-Stroke Engine Variants for China
MAN Diesel has developed two new engine variants targeted at the Chinese coast and river segment that represents some of the world’s busiest shipping lanes. The new S35MC-C9 and S40MC-C9 variants are based on the experience gathered from MAN Diesel’s existing range of well-proven, mechanically operated, two-stroke, low-speed engines.
The optimal ship size for this Chinese segment ranges from 10-20,000 dwt with a propulsion plant that generates between 5-8,000 kW at an approximate engine speed of 140 rpm. The MC-C9 design represents an upgrade on previous marks and offers improved operational economy, flexibility and manoeuvrability. For ease of installation, MAN Diesel also provides the engines with a built-on lube oil filter.
The new MC-C9 variants have a stroke-bore ratio of 4.4:1 to facilitate the low propeller speed that translates into 142 and 136 rpm respectively for the S35MC-C9 and S40MC-C9 engines. Similarly, the S35MC-C9 and S40MC-C9 engines display mean effective pressures of 21 and 21.4 bar respectively.