Swiss marine power company WinGD has completed both Type Approval Testing (TAT) and Factory Acceptance Testing (FAT) of its ammonia-fueled two-stroke marine engine, marking a milestone in efforts to decarbonize shipping.The test
Swiss marine power company WinGD has completed both Type Approval Testing (TAT) and Factory Acceptance Testing (FAT) of its ammonia-fueled two-stroke marine engine, marking a milestone in efforts to decarbonize shipping.
The test programs were completed in January 2026 on the X52DF-A-1.0 engine at HD Hyundai Heavy Industries’ Engine & Machinery (HHI-EMD) facility in South Korea. The tests were witnessed by classification society Lloyd’s Register together with representatives from major classification societies, under the supervision of EXMAR.
The 52-bore engine will be installed on a 46,000 cubic meter LPG/ammonia carrier on order for EXMAR. The vessels are expected to become the first ammonia-fueled gas carriers to enter commercial service.
The X-DF-A engine uses high-pressure ammonia injection supplemented by a pilot fuel dose of around five percent at full load. According to WinGD, the engine delivers load handling, dynamic response and fuel efficiency on par with equivalent diesel-fueled X-Engines in both ammonia and diesel operating modes.
WinGD said the multi-year development and testing program demonstrated strong performance, with nitrogen oxides (NOx) emissions during ammonia operation well below those generated during diesel use. The company also reported negligible nitrous oxide (N2O) contribution to the overall greenhouse gas emissions footprint.
To remind, WinGD
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