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Heesen begins tank testing for 80m flagship Project Cosmos

Dutch yard Heesen Yachts has revealed new details about its largest new-build to date, the 80 metre Project Cosmos.

The yacht's proof of concept and testing process has progressed, culminating in the physical tank testing of a 3.7 metre scale radio controlled model at the Wolfson Unit in Southampton.

The data gathered by the tests will inform the fine tuning of the structural design. Meanwhile the refinement of the propeller design is being undertaken by design engineers at Rolls-Royce.

The yard also revealed that the keel laying ceremony, which will mark a milestone in the construction of the 80.7 metre yacht, is due to take place in April.

Heesen chief executive Arthur Brouwer said: "Project Cosmos is raising the bar once again not only for Heesen, but for custom aluminium yacht building in general.

"The solutions we have implemented to meet all these requirements are once again driving superyachting forward – just as Heesen has done with innovative and ground-breaking projects throughout its 40-year history.”

Heesen sales and marketing director Mark Cavendish previously revealed that the yacht will have a 1,700GT and top speed of 30 knots.

Consequently, Cosmos will be powered by four MTU 20 V 4000 engines with a combined 19,000hp.

Sold in March 2018 and also known as hull YN19480, this fast displacement motor yacht will feature exterior styling by British studio Winch Design, exhibiting “muscular sportiness and timeless elegance”, with Sinot Exclusive Yacht Design appointed to design the yacht's interiors.

This will be Heesen's third collaboration with Sinot, which also worked on 55 metre Azamanta and 70 metre Galactica Super Nova.

Cavendish revealed the owner had briefed Sinot to create a "lighter, luxurious and comfortable interior" and for ceiling heights to be "as optimised as possible." The interior is also set to include a spectacular spiral superyacht staircase.

Decorative materials, such as black onyx, straw marquetry and crystal panels, will feature throughout the yacht while custom furniture made from glass, marble, metal and various woods will add the finishing touches to this highly modern superyacht. The aft deck swimming pool will also be glass bottomed, Cavendish said.

He added that the yacht's 270 square metre sun deck would be "breath-taking, not just for its size but also for the beautiful layout which provides many and varied areas for guests to enjoy.”

He described Cosmos' beach club as its "piece de resistance". “Drop-down platforms to the stern and side create a truly enormous space, and there is a stunning sunken bar below the onyx and glass clad bottom of the aft deck swimming pool," he said.

Accommodation is for up to 12 guests split across six cabins, including a main deck master suite, bridge-deck VIP and four lower deck cabins. Meanwhile, the crew quarters is suitable for a staff of up to 19 people.

Ease of access is ensured by a crystal elevator running from the lower deck to the sundeck. Tender storage will be provided on the foredeck, where Project Cosmos will carry a Winch-designed custom limousine.

Other key features on board Project Cosmos will include a fully-rated superyacht helipad. Capable of hosting a Eurocopter EC135, this space can be easily converted into an open air cinema.

Heesen adds that Project Cosmos will be the world’s largest and fastest all-aluminium motor yacht with conventional propulsion when delivered in April 2022.

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