We design the marine propulsion of tomorrow

Powerful, automated, zero-carbon

Using directly the power of wind to assist your ship's engine, our wing-sails generate considerable fuel savings and allow you to face the IMO regulations (EEDI, EEXI,...).

Slide Slide Slide Slide

The perfect shape

Our patented technology allows us to design a thick, assymetrical wing-sail able to change tack to use port and starboard winds.

The exceptional lift-to-drag ratio allows it to use wind power by almost all wind conditions, including on fast ships.

mecanisme aile

The wind engine check list


  • Powerful : The best possible lift/drag ratio (>11) : the wing of a glider


  • Robust : Composite surface and structure like a wind turbine = durability for m2 ; Linkages : only pivots + locks = proven technology from offshore tech


  • Simple : Height reduction (/2) + aerodynamic force reduction (/10) + increase in strength (x4) … in one step
systeme folded and unfolded

The optimal trim

Our system is able to tune itself automatically depending on the wind conditions to ensure optimal savings on our ship.

The exceptional lift-to-drag ratio simplifies the integration with existing hulls and propulsion systems, giving twice the performance of a symmetrical wing-sail of the same size.

The maximum power

On a ship sailing 16 knots, even the Atlantic winds are rarely at broad reach.
That's why the performance very close to the wind (20° apparent wind) is so important.

True wind
Apparent wind

Statistics US > Europe


Statistics Europe > US


Propulsion power


Full performance for your ship

CWS is working with several partners to provide the most accurate performance predictions for our wing. This includes wind tunnel testing, ship balance analysis, EEDI reduction analysis and operational fuel economy through optimized routing.

We can also work with several third-party modeling companies in order to provide you with an independent validation of our system.

wind tunnel

Mastery of manufacturing steps

embase diva

Low interface

Couronne d'orientation DIVA

Slewing ring

Infusion DIVA

Composite segment preparation

Prototype ready to be tested



Diva allongé

Lying position

Diva debout

Elevated position

Dedicated team

team 2018

2018 First prototype presentation

team 2020

Enjoying a moment of freedom in the middle of summer 2020

Know your ship and start saving now !

EEDI and EEXI constraints are one of the main preoccupation of shippers. Thanks to our partnership with Adrena and working in collaboration with MARIN, D-Ice and Blue WASP we can provide you with not only a historical assessment of what a CWS installation would provide … But also the savings you can start achieving right now using routing software on your ship.