Leonhardt & Blumberg Retrofits First Cargo Ship With Wind Propulsion

German shipowner Leonhardt & Blumberg has retrofitted the first of four general cargo newbuilds with a wind-assisted propulsion system, describing it as a logical next step toward greener operations. The 6,000-deadweight-tonne Hansa Drejoe was fitted with Econowind VentoFoils, which are expected to deliver roughly 10 percent additional thrust and reduce fuel consumption and CO2 emissions. The move helps the vessels benefit under international and regional emissions regulations while giving the owner operational experience with the technology.

 

Details of the Retrofit

 

Leonhardt & Blumberg has completed a significant retrofit. It fitted the first of four general cargo newbuilds with wind propulsion. The vessel is the 6,000-deadweight-tonne Hansa Drejoe. It was built in China and delivered in 2025. The retrofit took place at Royal Niestern Sander Shipyard.

The programme is proceeding across the vessel series. The retrofit occurred in early August. The vessel was fitted with Econowind VentoFoils. The next vessel for retrofit is sister ship Hansa Christiansoe. That vessel is currently at the shipyard.

 

Expected Performance Benefits

 

The technology is projected to deliver measurable gains. The VentoFoils will provide roughly 10 percent additional thrust. This additional thrust reduces fuel consumption. It also lowers the vessel's CO2 emissions. These benefits form the core rationale for the retrofit.

The performance assessment is grounded in real operations. The estimate is based on the vessel's actual trading routes. It reflects performance throughout the year. This makes the projection specific to the vessel's use. It provides a realistic picture of the expected benefits.

 

The Owner's Rationale

 

The owner frames the move within a broader strategy. Company representatives called it a logical next step. This step is part of a journey toward greener operations. The business case is important to the decision. However, the owner also cites a responsibility to advance the industry.

The technology offers dual benefits to the company. Econowind's technology is described as practical and well-developed. It allows the owner to pursue both goals at once. These are commercial benefit and industry progress. The retrofit also provides real operational experience.

 

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Design for Wind Integration

 

The vessels were designed with wind propulsion in mind. Groot Ship Design created the four Groot XL-type vessels. They are breakbulk cargo vessels. The design allows for easy integration of a propulsion system. This foresight simplifies the retrofit process.

The installation follows a specific configuration. The VentoFoils are installed on the weather deck. They are positioned in front of the first cargo hold. The remaining two vessels are under construction in China. Hansa Fanoe and Hansa Graesholm will also receive the units.

 

Regulatory Advantages

 

Wind propulsion offers benefits under emissions regulations. Lower fuel consumption reduces exposure under the EU Emissions Trading System. Equipped ships also obtain a Wind Reward Factor. This lowers their greenhouse gas intensity score under FuelEU Maritime. They can also accumulate a compliance surplus.

The technology aids compliance with IMO requirements. Wind assistance can lower a ship's carbon intensity. This occurs through reduced fuel consumption. It helps vessels meet their EEXI requirements. This makes the technology valuable for regulatory compliance.

 

Growing Industry Adoption

 

The retrofit reflects a broader industry trend. Leonhardt & Blumberg is not alone in adopting the technology. A growing number of ships are being equipped with such systems. This spans both existing and newbuild vessels. The trend reflects rising interest in wind assistance.

Industry figures illustrate this growth. The International Windship Association reported adoption data. As of the second quarter of 2026, 107 ships were equipped. These used rotor sails, suction sails, rigid wing sails and kits. Another 16 vessels were categorised as wind-ready.