C-Job Designs Wind-assisted Flettner Freighter
“Our experience from the Project S@IL study showed that Rotor Sails were the most viable choice compared to other wind assisted propulsion systems,” explains C-Job Business Manager Jelle Grijpstra. “And then, together with Finnish Rotor Sail supplier Norsepower, we concluded that two larger Rotor Sails were most effective for this project. This was because these would yield a comparable propulsive force to four smaller units. Also, with two Rotor Sails, one on the bow and one on the stern, there would be no chance of wind shadows affecting performance.”
The subject of the main engines of the FF8500 has yet to be decided upon. “Switijnk has a well-defined vision of sustainable shipping and we are glad to sit down and share our knowledge with them. We have an extensive track record of integrating mission equipment, and we have looked at all the options available to help them achieve their ambitions. We have reserved space for LNG engines; although this will be dependent on LNG bunkering infrastructure along their sailing routes.”
With the concept design of the vessel complete, the next stage of the project will consist of testing at Maritime Research Institute Netherlands (MARIN). The intention of this velocity prediction research is to validate the design and to quantify the fuel savings to be gained. “Once investors are convinced and the financing is arranged, then Switijnk can continue with the process of selecting a shipyard to build the vessel,” Mr Grijpstra adds.