MAN Energy Solutions to provide 175D four-stroke engine for Pohjanmaa-class corvettes of Finnish Navy.

According to information published on October 15, 2020, MAN Energy Solutions has announced the latest order for its MAN 175D four-stroke engine in connection with the building of four Pohjanmaa-class corvettes for the Finnish Navy. Each of the four ships will be equipped with 4 × MAN 12V175D-MEL GenSets with a total output of 7,700 kW (4 × 1920 kW) – in total, 16 GenSets.
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Artist drawing of new Pohjanmaa-class corvette for Finnish Navy. (Picture source MAN Energy Solutions)

Jyrki Heinimaa, CEO of Rauma Marine Constructions, said: “Due to COVID-19, the negotiations were challenging and required additional effort and patience from both parties. RMC has good experience in working with MAN and looks forward to continuing the cooperation for the Squadron 2020 project from Augsburg.”

Ben Andres, Head of High-Speed Sales, MAN Energy Solutions said: “This is a very welcome order that owes much to our broad experience with the 175D engine in the naval sector, and is the latest in a series of demanding and varied naval orders that we have landed. In this particular instance, the MAN 175D’s technical and economical credentials stood it in good stead, while its compactness, shock capability, and best-in-class fuel-oil consumption were also key criteria for the customer. Integrated Logistics Support (ILS) for the power systems will ensure efficient and cost-effective maintenance throughout their entire service life.”

Rauma Marine Constructions – based in Rauma, southwestern Finland – will construct the vessels for the so-called ‘Squadron 2020’ project between 2022-2025. The first test-runs at sea are already scheduled for 2024 with all vessels projected for completion by 2028.

Squadron 2020 is a Finnish naval project that aims to replace seven older vessels with new Pohjanmaa-class corvettes. The four modern corvettes will then form the backbone of the navy into the 2050s. The overall length of the Pohjanmaa-class corvettes is 114 meters, with a beam of 16 meters and a maximum draught of 5 meters – corresponding to a displacement of some 3,900 tonnes.

The new buildings will form an indispensable defense function and are intended for repelling attacks from the sea and securing vital assets at sea and in the Finnish archipelago.

During normal patrol operations, each ship's twin, ice-strengthened, controllable-pitch propellers will be driven by electric propulsion motors with a number of the four MAN 175D diesel generators installed on double-resilient mounting for mission purposes.

MAN Energy Solutions has developed the MAN 175D engine range to supplement and complete its product portfolio in the maritime sector. In three variants of 12, 16 and 20 cylinders, the engine is available with an output ranging from 1,500 to 4,400 Kilowatts and is optimized for propelling ferries, offshore supply vessels, tug boats and other working vessels. Other market areas, such as super-yachts and naval marine applications are also served by additional, specialist model versions.

It is also an extremely eco-friendly engine, being designed from the outset with compliance to the latest, as well as future, exhaust-gas-emission requirements and utilizes a very compact and flexible SCR system, which enables vessel designers to optimize space onboard to the maximum.