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16 December 2018 The on-line newspaper devoted to the world of transports 06:32 GMT+1



November 30, 2018

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Rolls-Royce, contract in order to optimize the propulsion of nine new ships ro-ro of Grimaldi

The deliveries will happen from 2019 to 2021

Rolls- Royce Commercial Marine has adjudicated a contract for the supply of systems in order to optimize the propulsion of the nine ships ro-ro that they will be constructed by the Chinese ship yard Nanjing Jinling Shipyard Co. for the Italian shipowning group Grimaldi. The new units, calls "Grimaldi Green 5th Generation" (GG5G), will have a length of 238 meters and will be able to transport beyond 7.800 linear meters of goods rotabili, pairs to about 500 trailer. The ships will while browsing have a system of hybrid feeding with the electric power and traditional fossil fuel use during the pause in port.

The Rolls-Royce supply includes the wheel houses and the Promas system that integral the propeller and the rudder in an only system in order to optimize the hydrodynamic efficiency. A special hydrodynamic fairing is mounted on the ship-boy of the propeller in order to optimize the flow towards a bulb that is integrated to the rudder, reducing effectively the separation of the flow immediately after the propeller. The result is an increase of the thrust of the propeller since the energy previously which released is recovered by the flow. The addition of the bulb on the rudder optimizes also the flow to aft of the rudder, reducing ulteriorly the resistance.

The delivery of the systems is previewed beginning from 2019 until the completion of the last ship of the series in 2021.

ABB Marine Solutions
Consorzio ZAI



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