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A novel wingsail system for assisted clean sailing in the maritime transport sector

July 2018
Gallery Bound4blue  1
Gallery Bound4blue  1


Bringing aviation technology to shipping via a new foldable wingsail designed to reduce fuel consumption and pollutant emissions of maritime transport in existing and newly built vessels.

The shipping industry transports 90% of the world’s cargo, resulting in enormous air pollution impacts. Designed as an engine assist technology, the rigid wingsail system is completely foldable to the ship's deck to avoid safety issues during harsh weather conditions or during loading/unloading operations. It is fully automated - no extra crew required - and will orient itself to maximize performances for any wind direction. As a result the wingsails thrust capacity is ten times higher than that of traditional sails and other existing novel designs. By generating effective thrust from wind power, Bound4blue’s rigid wingsails allow vessels to operate at their nominal service speed with reduced engine propulsion, thereby lowering fuel consumption and polluting less.

  • /
Label Date July 12, 2018
From Spain
Maturity stage Initial market commercialization
Looking For Funding from investors and public organisations; Stricter policy framework; Stronger support from technology and engineering network of partners

Implementation Stories

Bound4blue by bound4blue
Implemented by Amasus Shipping in Delfzijl (Netherlands) in 2022

Amasus Shipping signs an agreement with bound4blue to start powering the M/V EEMS Traveller with wind - bound4blue will install in 2022 two 17-metre-high eSAILs® on the general cargo vessel. - A similar unit was installed on M/V La Naumon, being the largest suction sail ever built and installed on a vessel. - Amasus Shipping is one of the biggest and most reputable European shipowners and operators in the shortsea, bulk, general cargo, offshore and worldwide heavy lift (including RoRo) market.


Integrating wind-assisted propulsion systems like eSAILs® on ships significantly reduces fossil fuel consumption and lowers greenhouse gas emissions, contributing to a more sustainable and environmentally friendly maritime industry.

Bound4blue by bound4blue
Implemented by Oceanking in Athens (Greece) in 2023

bound4blue and Oceanking have announced a partnership to jointly expand access to the eSAIL technology in Greece and Cyprus. The eSAIL is a wind-assisted propulsion system known as suction sail. Suction sails combine the positive features of both wingsails (ease of operation, low power consumption, excellent capacity to sail upwind) and flettner rotors (high lift, small size), resulting in the most payback-efficient technology in the market.


The partnership between bound4blue and Oceanking aims to bring the efficient eSAIL wind-assisted propulsion technology to Greece and Cyprus, blending the best features of wingsails and Flettner rotors for a highly effective and compact solution that enhances the sustainability and cost-effectiveness of maritime operations.


The environmental benefits

  • Emission reduction between 10% to 30%
  • Flexibility: Foldable, orientable and scalable system
  • Zero impact on cargo capability
  • Low maintenance

The Financial benefits

  • Payback period under 5 years depending on size of ship
  • Reduced fuel consumption and thus lower costs
  • Job-creation (including highly-qualified engineers) for manufacturing and integration of the solution

Activity Region

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  • Headquarters
  • Activity

Company Profile


b4b is positioned as a fuel efficiency tech supplier for the shipping industry to reduce the dependence on fossil fuels.

View company profile
Headquarters 08191 Rubí, Barcelona, España
Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator bound4blue has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.