New Inflatable Sail Promises Fewer Emissions

Michelin, the French tire company, has produced an innovative sail design that can help cargo vessels lower carbon emmissions. Currently cargo vessels account for 3% of global greenhouse emisions. Michelin says that the sail/wing design could cut emissions from fuel oil engines by 20% for existing ships and up to 50% for new designs. The WISAMO design--which stands for wind, sail and mobility--is automated, retractable, and inflatable which gives it extra stability over conventional sails and does not require additional crew members with sailing experience. It will not replace engines, but lightens the load and decreases the dependance on fuel. 

The International Maritime Organization has set a goal of reducing emissions by 20% by 2030 and 70% by 2040 to reach a net zero goal by 2050. Consequently fuel saving and emission reductions have become a priority for the shipping industry that currently relies almost exclusively on heavy fuel-oil to power cargo vessels that account for 90% of the world's goods in international trade. Michelin introduced WISAMO at a trade convention in 2021. Since then it has been testing the concept on the MN Pelican, a ro-ro ship (roll on, roll off) in the Bay of Biscay known for its strong winds and rough seas. Pelican's crew is impressed with its performance particularly into the wind The first tests were carried out on a yatch owned by champion French sailor, Michel Desjoyeaux.

When conditions are suitable the wing telescopes up a mast and fans inside the sail structure inflate it. When returning to port or when winds exceed 55 knots, the mast automatically retracts, folding the sail neatly on deck. The system is marked by its simplicity of operation and installation is feasible on many types of craft. Large container ships could use up to six of the sails. Retractability makes loading and unloading easier. Michelin estimates WISAMO could save companies money by carrying less fuel; WISAMO pays for itself in about five years.