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International Windship Association | July 14, 2024

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bound4blue – IWSA Member

bound4blue – IWSA Member

bound4blue has designed and developed the eSAIL®, a wind-assisted propulsion system based on active boundary layer control using suction. It is an efficient and validated solution for saving fuel and emissions on a wide range of vessel types, on both newbuilds and retrofits.

When exposed to wind, with the suction off, it only produces drag as with any other non-lifting structure. However, when the suction is activated, a small amount of air is sucked in, which re-adheres the airflow to the sail, generating enormous amounts of lift with low drag. The system produces 6 times more lift than a conventional sail, with minimal power consumption, no mechanical complexity and no impact on cargo handling or port operations, thus ensuring simple and reliable operations. Moreover, the operation is fully automatic thanks to an autonomous control system.

The company, founded in 2014 with a vocation clearly focused on the renewable energy sector in the maritime field, has its headquarters in Cantabria (Spain) and offices in Barcelona and Singapore. During 2021, the company installed its eSAIL® system on two ships and has signed additional agreements with other shipowners such as Amasus Shipping and Louis Dreyfus Armateurs to install the system on their fleets starting in 2022.

For more information, visit

IWSA Member
Headquarters Addressc/Melampo, 2, 1º Oficina 3B,
39100 Santa Cruz de Bezana (Cantabria)
Barcelona Facilities AddressCarrer de Marie Curie, 2, Nave 14,
08210 Barberà del Vallès (Barcelona)
Phone+34 938 337 392