WAAMpeller 3D printed ships’ propeller approved

Following a rigorous testing process, verified by Bureau Veritas, the world’s first Class approved 3D printed ship’s propeller, the WAAMpeller, has been unveiled at Damen Shipyard Group’s headquarters in the Netherlands.

The five-company partnership started pooling their collective resources and knowledge to develop the world’s first 3D printed ship’s propeller seven months ago. Promarin provided the design of the triple-blade propeller. The Port of Rotterdam’s RAMLAB (Rotterdam Additive Manufacturing LAB) carried out fabrication using Wire Arc Additive Manufacturing (WAAM) techniques, supported by Autodesk’s expertise in software, robotics and additive manufacturing.

Damen provided Research and Development resources in addition to one of its Stan Tug 1606 vessels for operational testing purposes. Bureau Veritas’ role was to verify the entire development, production and testing process.

The consortium reached its first milestone in August with the completion of the first WAAMpeller prototype. With valuable experience gained, production of the second version, with the aim of achieving class certification, started immediately.

“Production of the second WAAMpeller was greatly improved because we had learned a lot from producing the prototype,” said Vincent Wegener, Managing Director RAMLAB. “This mainly concerned the hardware/software interaction because, when laying down 298 layers of Nickel Aluminium Bronze alloy, it is important to have a tight control on all process parameters.

Damen’s testing engineers performed operational testing of the WAAMpeller on 20 November, with representatives from all of the consortium partners present. Furthermore, the day’s procedures were overseen by Bureau Veritas surveyors throughout.

Martijn Nieuwenhuijs, Chief Executive of Bureau Veritas Marine & Offshore Netherlands said: “Bureaus Veritas has witnessed every step of the making and testing of the WAAMpeller. Some challenges needed to be tackled along the way, but the final product is technically sound and ready for commercial application.”

The testing programme included bollard pull and crash stop testing in addition to speed trials. “Of course, we were all a bit nervous beforehand – after all, innovation always comes with a certain amount of unknowns – but the testing was a success,” says Kees Custers, Damen Project Engineer R&D enthusiastically.

“We are pleased to report that the WAAMpeller displayed the same behaviour as a conventional casted propeller in all of the tests. This includes the same level of performance in the crash stop scenario, which – going from full throttle ahead to full throttle reverse – is the heaviest loading that a propeller can experience.”

Talking before the WAAMpeller unveiling event, which took place on 30 November, Allard Castelein, CEO Port of Rotterdam took the time to highlight the efforts of the collaborating partners: “The WAAMpeller project is special for many reasons. Not only has it produced the world’s first class approved 3D printed ship’s propeller, but this has been accomplished within a very impressive seven-month timeframe and only one year after the official opening of RAMLAB.”

Looking at the bigger picture, Mr Castelein went on to identify the implications of the WAAMpeller project on the maritime industry. “This project has shown the shipbuilding industry the potential of 3D printing techniques for the production of vessel components. We continue our intensive research into this very exciting area.”

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