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Wind-assisted ship design

Tuesday, 13 Feb 2018

A concept design for a wind/sail power-assisted general cargo vessel has been delivered by C-Job Naval Architects of the Netherlands to Dutch customer Switijnk Shipping.

The 8,500dwt vessel will be equipped with two Norsepower Rotor Sails

Once investors are convinced and the financing is arranged, then Switijnk can continue with the process of selecting a shipyard to build the vessel. The design, for a type Flettner Freighter, is expected to achieve fuel savings of approximately 14% compared to conventional vessels. The 8,500dwt vessel will be equipped with two Norsepower Rotor Sails that will supplement the main engines, creating a new hybrid power solution. Family-owned Switijnk approached C-Job following its involvement in the European Union Interreg project S@IL, for which C-Job developed the earlier design of a 4,500dwt Flettner Freighter. C-Job designed this smaller vessel with four rotor
sails. However, after studying the prevailing wind patterns on Switijnk’s proposed sailing routes, C-Job decided to design a new vessel, called the FF8500, with two larger rotor sails, said C-Job Business Manager Jelle Grijpstra.
Rotor sails were chosen for this project because they are easy to use, safe, reasonably quiet, with no need for extra crew, and cheaper in investment compared to other systems. The design has reserved space for liquefied
natural gas (LNG) engines; although this will be dependent on LNG bunkering infrastructure along their sailing routes. The next stage of the project will consist of testing at Maritime Research Institute Netherlands (MARIN)
to validate the design and to quantify the fuel savings to be gained.