Rolls-Royce supplies advanced propulsion systems for Polish Navy's new Miecznik frigates.

According to a PR published by Rolls Royce on June 6, 2024, the company Rolls-Royce is equipping three new Miecznik-class frigates for the Polish Navy with mtu propulsion and on-board power systems. The first set of engines and generators is currently being manufactured at Rolls-Royce's facility in Friedrichshafen, Germany.
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A model of the Arrowhead 140 frigate. (Picture source: Army Recognition)

Each frigate will feature four mtu 20V8000 main propulsion engines, each providing 8,200 kW, and four mtu 12V4000 generators, each delivering 1650 kW of mechanical power. These systems form the CODAD (Combined Diesel and Diesel) propulsion setup, offering versatile operation modes—from single-engine slow patrols to high-speed navigation exceeding 20 knots (37 km/h). At a cruising speed of 12 knots (22 km/h), the vessels will achieve a range of approximately 8,000 nautical miles (15,000 kilometers).

The on-board generators will ensure a stable electrical supply for all ship and mission operations, independent of the propulsion system. The frigates will be outfitted with sophisticated weapon and mission systems designed for sea area surveillance, naval base protection, and engagement of surface, underwater, land, and air targets.

Construction of the first Miecznik-class frigate, based on the British Arrowhead 140 design, is underway at the PGZ shipyard in Gdynia. The first vessel is expected to launch in 2026 and enter service by 2030, with the remaining two ships scheduled for delivery by 2031.

Since its introduction in 2000, the mtu Series 8000 has set the standard for high-speed, high-performance diesel engines. The 20-cylinder models, capable of producing up to 10,000 kW, are widely used in naval, government, and commercial vessels, known for their rapid acceleration, fuel efficiency, and ease of maintenance. The range now also includes a 16-cylinder variant offering up to 8,000 kW.