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Wärtsilä’s two-stroke engines, X72 and X62, designed to deliver fuel efficiency, provide reliability and reduce operational costs have successfully completed two different performance tests.

The X72 engine passed the type approval test (TAT) by the company’s licensee, Doosan Engine, in Changwon, South Korea, and the X62 engine was put through a factory acceptance test (FAT) by Hyundai Heavy Industries Engine and Machinery Division (HHI – EMD).

The TAT verifies that the X72 engine meets all classification society requirements, including the safety of life at sea (SOLAS) standards, before being launched into the market.

With a single engine powering the propeller, X72 was also tested for its ability to remain operational under diverse conditions.

The Wärtsilä X62 engine’s design criteria was tested to check its performance and functioning. It was later accepted by both the customer, Kyklades Maritime Corporation, and the classification society Det Norske Veritas (DNV).

Both engines feature Wärtsilä’s second-generation version of electronically controlled, common rail system with time controlled fuel injection and a higher stroke-to-bore ratio than the RT-flex engines.

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“Its high-level of efficiency lowers the operational costs for owners, operators and charterers.”

Commenting on X72, Wärtsilä Switzerland managing director and Wärtsilä Ship Power 2-stroke vice-president Martin Wernli said: “The key value-adding feature of this engine is that its high-level of efficiency lowers the operational costs for owners, operators and charterers.”

The X62 engine has been ordered for installation on to four 115k Aframax product carriers, which are currently being built by the HHI Gunsan shipyard.

Under a license from Wärtsilä, a series of four engines are being produced for Kyklades at the HHI – EMD factory in South Korea.

The engines can also be used to power vessels ranging from Panamax to Capesize bulk carriers (60,000dwt to 210,000dwt), Aframax to Suezmax tankers (80,000dwt to 200,000dwt) and container feeder vessels (1,600TEU to 4,500TEU).

Image: Wärtsilä X62 engine will be installed in four 115k Aframax product carriers. Photo: courtesy of Wärtsilä.