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Tuesday, December 24, 2019 

Caterpillar Marine has congratulated Stena on the success of recent sea trials of its first E-Flexer ferry with MaK 12 M 43 C and twin-screw Cat Marine Propulsion drive trains with MPP 1410f propellers, shafts and packaged gearboxes.

Stena Estrid is the first of Stena RoRo’s next-generation ro-pax vessels in a nine-ship series, five of which will be operated by Stena Line with the other vessels on long-term charter to other companies. Constructed at the China Merchants Jinling Weihai Shipyard in China, Stena Estrid measures 215m long with 3,100 lane-metres of capacity and has been designed to be among the most fuel efficient and flexible vessels of this type and size.

On trials, Stena Estrid made significant speed on two shaft lines as well as on one shaft line with the other in feathering mode. Per Wimby, Project Manager Hydrodynamics, Stena Teknik, said: “We did 18.5 knots using only one engine which exceeded our expectations.”

Caterpillar has been contracted to supply main engines and propulsion packages for seven of the E-Flkexer series so far. Working with designer Deltamarin, Stena and the shipyard, it was determined that the MaK 12 M 43 C and feathering Cat Propulsion MPP 1410f Propellers would be the optimum match, and this package was further optimised through simulations and model tests.

“After a long period of optimisation and testing with CMH/Deltamarin, MARIN and Caterpillar we now see the final product which is the most efficient ship in Stena's history,” said Wimby.

Janne Uotila, MD Deltamarin said: “One of the key principles of Deltamarin designs has always been energy efficiency. Nowadays, due to environmental reasons and stricter regulations even more so and this project is a good example of this. It is a result of close cooperation with Stena and Caterpillar in early stage of the development.  All in all this is a great achievement and a benchmark for how close collaboration between all parties (Stena-CMH-DM-CAT) can lead to fantastic results.”

Mattias Hansson, Solutions Manager, Caterpillar Marine, said: “The open professional collaboration between all parties, from day one throughout the process, has been key to success.”

Per Westling, MD Stena RoRo, said: “The MaK engines we have are extremely fuel-efficient and require little maintenance.”

Stena Estrid is currently en route to the Irish Sea where she will begin service early next year on the Dublin to Holyhead service.

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