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New lightweight USV-focused engine launch
Loki Dynamics, the trusted UK representative for MD Powertrain of Sweden, has been showcasing a new USV-focused lightweight, high power-density diesel engine at Seawork 2026, the 'Marine Diesel MD 3.0'.
Built around an advanced 3.0-litre inline six-cylinder Common Rail Direct Injection (CRDI) platform, the engine delivers up to 340hp from an exceptionally compact package measuring just 768mm x 620mm x 753mm. Designed primarily for the rapidly growing Uncrewed Surface Vessel (USV) sector, the engine can also be configured for commercial, defence and recreational marine applications.
A solenoid-controlled common rail injection system delivers outstanding performance, fuel efficiency and reliability, while a unique compacted aluminium cylinder block reduces weight and noise compared with traditional grey cast iron designs. The result is a powerful, lightweight and highly adaptable marine engine offering exceptional power-to-weight performance where space, weight and efficiency are critical.
Thomas Jakobsson International Sales for MD Powertrain explained, “Our new 'Marine Diesel MD 3.0 is a small, light and high powered engine for unmanned surface vessels. You want something as light as possible for these vessels and we hope that it's going to be a market changer.”
David Madsen, managing director at Loki Dynamics added, “This engine has got many applications, but one of the key selling points is the integrated control systems. Everything's autonomous and remote so to have integrated control platforms for the engine and the boat’s systems is key.”
Technology has moved rapidly as Madsen notes, “I’ve seen technology move about 100% over the past few years but behind the scenes that’s probably closer to 500%. Technology is an ever-moving feast, so you can’t stand still but instead need to run faster. This is one of the reasons we’ve taken the decision to move forwards with autonomy innovation.”
Explaining why Seawork is the chosen location to launch and showcase their latest innovation Jakobsson continued, “We've been exhibiting here together with our distributors for over 20 years and this is the best marketplace in Northern Europe for products like this.”
Madsen agreed and explained, “I think this is my 25th consecutive Seawork and it has provided us with about 70 - 80% of our business.”
Visitors to Seawork are invited to meet the team on Stand Q66 (Quayside) to discuss their propulsion requirements and discover how this next-generation engine platform can be tailored to specific vessel and mission profiles. The Marine Diesel MD 3.0 will be available from August 2026.
