MAN completes successful type approval tests on new engines
Group photo from the TAT at STX in April 2025 (Source: MAN Energy Solutions)
MAN Energy Solutions has revealed that type approval tests (TATs) have been conducted successfully on a new engine intended for use as an auxiliary genset or electric propulsion at constant speed, respectively, of 720 and 750rpm. The TATs involved the testing of both of the dual-fuel MAN 35/44DF variants – the methane-capable 35/44DF CD and the methanol-ready 35/44CD unit.
The tests were carried out in mid-April at STX Engine headquarters in Changwon, South Korea. Six classification societies attended the tests.
MAN Energy Solutions’ Alexander Knafl, senior vice president, commented: “We have worked closely with STX over the past three years in developing the MAN 35/44DF CD. We anticipate it having broad appeal, especially among container vessels and LNG carriers. In addition to its strong output, other advantages of the MAN 35/44DF CD include its effective reduction of methane slip and its future-fuel readiness for methanol and other fuel types.”
The new GenSet has been designed to help lower shipowners’ capital expenditure as well as operating costs, while remaining relevant for the coming decades. The MAN 35/44DF CD dual-fuel engine is based on the proven MAN 35/44DF CR and MAN 32/44CR engines whose performance has been fully verified over many years and millions of operational hours. MAN Energy Solutions reports that the MAN 35/44DF CD features minimal greenhouse-gas emissions and that, compared with industry standards, it can reduce methane slip by up to 85%.
