RT-flex50 version D low-speed engine This new Wärtsilä engine supports the industry's need for low-speed, 2-stroke engines for smaller vessels. It offers lower operating costs and improved environmental sustainability.Wärtsilä, the marine industry's leading solutions and services provider, has successfully tested its first Wärtsilä RT-flex50 version D engine with a turbocharger (TC) installed on the driving end side. With the addition of this engine, Wärtsilä now has an additional 2-stroke engine that can be fitted to smaller vessel types. The derated engine runs on lower rpm's and features reduced fuel consumption, thereby enabling lower emission values to be achieved - including smokeless operation, especially at low engine load.The RT-flex50 version D engine with turbocharger on the driving end side expands the possible applications of Wärtsilä 2-stroke engines with 50 cm cylinder bore for new vessel constructions.Due to its narrow design, the new engine version will be used for ship designs with slim stern sections where the current standard execution, with turbochargers mounted on the exhaust engine side, does not fit. The RT-flex50 version D can now be used instead of other engine types featuring a smaller cylinder bore and higher speed. In many cases the higher performance of the cylinders allows ...
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