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

July 2018
  • /

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

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

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.


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

  • World Alliance Member
  • Featured Solution
  • Labelled Solution
Label Date July 12, 2018
From Spain
Maturity stage TRL 9 / CRI 2 - Commercial Trial Small Scale

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.

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

Target client profile

Activity Region

  • Headquarters
  • Activity

Company Profile


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

Headquarters 08191 Rubí, Barcelona, España
Type Company
View company profile

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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.