MAN Energy Solutions has received an order to deliver its MAN 175D four-stroke engines for Finnish Navy’s four new Pohjanmaa class multipurpose corvettes.
Each of the four vessels will be equipped with four MAN 12V175D-MEL GenSets with a total output of 7,700 kW (4 × 1920 kW). During normal patrol operations, each ship’s twin, ice-strengthened, controllable-pitch propellers (CPP) will be driven by electric propulsion motors with four MAN 175D diesel generators installed on double-resilient mounting for mission purposes.
The corvettes will be constructed by wholly Finnish-owned shipbuilding company Rauma Marine Constructions (RMC) based in Rauma, southwestern Finland between 2022-2025 as part of the Finnish Navy’s Squadron 2020 Project. The first test-runs at sea are already scheduled for 2024 with all four vessels projected for completion by 2028.
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.”
The MAN 175D GenSets bound for Finland have a number of standout technical features:
• double-elastic seating
• a number of GenSets will have noise enclosures for silent operation
• MAN 175D is the only high-speed navy GenSet able to reach that power level with 12 cylinders, which makes it more compact and more effective in terms of maintenance
• the engines will be suitable for arctic operation and capable of functioning in extremely low air-intake temperatures.
MAN 175D Engines
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 utilises a very compact and flexible SCR system, which enables vessel designers to optimise space on board to the maximum.
Finnish Navy Pohjanmaa-Class Corvettes
The Pohjanmaa class is a class of four multi-role corvettes currently under development for the Finnish Navy as part of the Squadron 2020 (Finnish: Laivue 2020) project.
The new vessels are to be constructed at the Rauma Marine Constructions (RMC) shipyard in Rauma, Finland. The construction of the vessels is scheduled to begin in 2022 and the four-strong squadron is expected to achieve operational readiness by 2028.
The corvettes, along with the four Hamina-class missile boats that are being upgraded, will form the backbone of the Finnish Navy from the mid-2020s. The vessels will replace seven older vessels that have been or are due to be decommissioned: the Pohjanmaa minelayer, two Hämeenmaa-class minelayers, and four Rauma-class missile boats.
The Pohjanmaa-class corvettes will have an overall length of 114 m, a beam of 16 m and a displacement of 3,900 tonnes. The class incorporates some major features including ice-strengthened hull.
The corvettes will be armed with Bofors 57 mm naval gun, Evolved Seasparrow Missile (ESSM) surface-to-air missiles, Gabriel anti-ship missiles, Torped 47 anti-submarine torpedoes, and sea mines. They will also be equipped with two Saab Trackfire remote weapon stations (RWS) and two NSV 12.7mm caliber heavy machine guns (HMG).
The vessels are to be equipped with a flight deck and a hangar that can accommodate either a helicopter or UAVs. Each ship will have a crew complement of 70–120.