Azamanta, Heesen YN 17255, Fast Displacement Update

Heesen YN 17255

PHOTO: Dick Holthuis

The last day of February saw the hull and superstructure of Heesen YN 17255, a.k.a. Azamanta, joined. The megayacht marks the first steel 180-foot (55-meter) Fast Displacement project for the yard. She’s also the fourth to feature the Fast Displacement Hull Form (FDHF) created by Van Oossanen Naval Architects.

Heesen YN 17255 is about a year away from sea trials. However, Perry van Oossanen of the naval architecture team predicts she’ll see 15 knots under just half power. Heesen says she’ll also see a 16½-knot top end. It further states she’ll achieve a 4,500-nautical-mile range at 13 knots. It’s all due to the FDHF.

You may recall that Van Oossanen Naval Architects presented the FDHF concept at a marine trade show in 2009. Heesen was the first yacht builder to sign on to use it. It’s more slender than the typical round-bilge, hard-chine hull that most megayachts employ. Tank tests further show it kicks up smaller wakes, has good seakeeping abilities, and requires less fuel consumption throughout the speed range. The latter is key. Perry van Oossanen explains, “The typical load profile of a motor yacht often consists of long-range cruising at low speeds and only short periods of time at higher and maximum speeds. This indicates the need to focus hull design over the entire speed range rather than on maximum speed only. The FDHF incorporates design features that have a large effect on hydrodynamic resistance over the whole speed range, such as the area of the immersed transom, bulbous bow, trim control and spray rails.”

Heesen YN 17255 will treat her owners and guests to more than just performance. A forward garage with gull-wing doors will house tenders and toys. This allows a dedicated beach club and gym in the transom. The megayacht will additionally have accommodations for 10 guests plus the owners. Special friends or family will get the full-beam VIP stateroom. The owners, of course, get a main-deck suite with a private 753-square-foot (70-square-meter) alfresco area. Sinot Exclusive Yacht Design is overseeing the interior.

The video below is a time-lapse look at how the hull and superstructure came together.

Megayacht News Onboard: Heesen Yachts’ Galactica Star

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PHOTOS: exteriors by Jeff Brown; interiors by Churchill Interiors

At 213 feet (65 meters), Galactica Star is Heesen Yachts’ largest megayacht to date. Heesen is known for its sleek, fast yachts, and Galactica Star is in keeping with that philosophy. But, the megayacht puts a significant twist on it. Sure, she’s capable of a reported 28-knot top end. But, Heesen says that Galactica Star does so while burning 20 percent less fuel than comparable megayachts.

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Galactica Star employs a hull design called the Fast Displacement Hull Form (HDHF), by Van Oossanen Naval Architects. A patented design, the FDHF blends the best attributes of a traditional displacement hull with those of a semi-displacement one. These attributes are low resistance and higher performance, respectively. The FDHF is also efficient through the entire speed range, rather than at figures closer to top end. By comparison, traditional semi-displacement designs hit a performance hump, where the transition from slower, displacement speeds to higher, semi-displacement speeds occurs. Van Oossanen Naval Architects says the FDHF performs 15 to 20 percent better at displacement speeds. How does this translate to Galactica Star? The megayacht has a reported top end exceeding 28 knots, powered by twin MTUs. She also is said to burn 20 percent less fuel than comparable other yachts and see a reported 4,200-mile range at 14 knots.

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To complement Galactica Star’s different hull design, Heesen Yachts’ frequent naval architecture and styling partner Omega Architects worked with Van Oossanen. The goal was to convey a higher-tech look and feel yet still make Galactica Star look like she belongs in Heesen Yachts’ fleet. There’s a decided lack of overhang from the superstructure. Instead, the superstructure is self-supporting, positioned directly on the hull.

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Even at the waterline, you can appreciate the unusual styling of Galactica Star. Of course, the megayacht still embraces the features that owners and their guests want, like a beach club. It occupies 829 square feet (77 square meters). It also gains more space via fold-down platforms to port and starboard (visible in the previous photo).

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Take a look at the skylight just visible here in the beach club. It’s formed from the glass bottom of the hot tub on the main aft deck. Since Galactica Star’s beach club is permanent, not a tender garage that doubles as a guest spot, it’s fully air conditioned. A small galley lies beyond the bar, too.

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Sure to be an equally popular space aboard Galactica Star is the galley. Most megayachts belonging to owners other than Americans tend to treat the galley solely as a work space, rarely if ever visited by anyone other than crew. Aboard Galactica Star, it’s arranged like a chef’s table in a restaurant.

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The dedicated guest spaces throughout Galactica Star are unquestionably modern, suiting a higher-tech megayacht. They reflect a combination of Macassar ebony, spruce, metal, leather, and stones, the work of Bannenberg & Rowell. Spaces are also sometimes arranged unconventionally, like here on the main deck. Rather than a typical saloon followed by a dining area, Galactica Star has a three-zone area. In the background, you can see a seating area directly at the aft-deck doors. It flows into this bar/lounge area, complete with a bioethanol fireplace. This in turn flows into the dining area.

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Speaking of the dining area, here it is. For a 213-footer—with a beam of 37 feet (11.3 meters) no less—it is far more typical to have either a separate dining room or one that is otherwise arranged to look and feel separate. In contrast—and successfully so—Bannenberg & Rowell have designed it to look and feel cohesively with the lounging spaces.

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There’s also a cohesive relationship between the skylounge and alfresco seating/dining area, thanks to doors that can be left open. This makes for nearly 754 square feet (70 square meters) of entertaining space, for small gatherings and large cocktail parties alike.

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Come time to retire for the night, the owner of Galactica Star has, as you would expect, a main-deck master suite. Four double guest staterooms are below decks, while a VIP suite is on the upper deck.

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Being Heesen Yachts’ largest project certainly makes Galactica Star stand out. But the FDHF makes the all-aluminum megayacht far more noteworthy. Additional Heesen clients are grasping the significance of the design, too. Already, the builder has contracts and/or interest for megayachts from 148 to 230 feet (45 to 70 meters) employing it. It’s good to see design and build teams offer performance solutions that simultaneously preserve a little speed indulgence.

EXTRA PHOTOS: Visit our Facebook page to see more of Galactica Star.

 

Mulder Shipyard Signs Custom 34-Meter, Its Largest Megayacht

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The 111-foot (34-meter) megayacht pictured here will be the largest Mulder Shipyard delivery to date come 2015. She also represents the Dutch builder’s first project in excess of 300 gross tons.

With a beam of 26 feet (8 meters), the all-aluminum Mulder Shipyard 34-meter is being built to the design work of Van Oossanen Naval Architects and Claydon Reeves. The latter is supplying styling as well as interior design. Note the megayacht’s large expanses of glass, especially along the main deck. Some will slide open, to create an indoor-outdoor atmosphere. In addition, nearly all are full height. For further enjoyment, a balcony will fold down off the dining area, accessed via sliding glass doors.

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The Mulder 34-meter will accommodate eight guests and seven crewmembers. Of particular interest is the inclusion of two master staterooms (which Mulder also refers to as two VIPs). Perhaps that’s indicative of how the megayacht will be used. The two masters measure 344 and 301 square feet (32 and 28 square meters, respectively). One will be on the main deck, with a skylight immediately above the bed. The other will be below decks, incorporating the largest ports you see on that level. Two double staterooms that can convert to twins round out the guest areas inside.

Outside, the Mulder 34-meter makes some nice use of space. You can see a customary aft-deck seating area, though the lounges are positioned athwartships instead of parallel to the beam. There’s also a foredeck seating area, accessed via steps on centerline from the bow. To put the alfresco areas into perspective, the Mulder 34-meter’s sundeck occupies 807 square feet (75 square meters).

The new Mulder Shipyard megayacht will be RINA classed and comply with MCA and LY3 regulations. Twin Caterpillar C18s should permit the Mulder 34-meter with a 13-knot top end.

Heesen Yachts Launches Crazy Me, One-Off Megayacht

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Heesen Yachts is known for its range of series-built megayachts that are mostly customized inside, not fully custom yachts where the first lines drawn are based on the owner’s imagination. But sometimes breaking with tradition makes sense to a shipyard, which explains the commissioning of Crazy Me, a 164-footer (50-meter) that just hit the water at Heesen Yachts.

If the megayacht project doesn’t sound familiar, it’s because Heesen Yachts hasn’t been able to reveal any details until the launch and christening, which took place last week. In keeping with being the first all-custom launch (a.k.a. one-off launch) from Heesen since the 1980s, when it built notable one-offs like Octopussy, Crazy Me marks a decided departure in styling. The owners tapped Gary Grant Design, who has graced a handful of yachts with interesting and innovative shapes. These include the 116-foot (35.4-meter) Margaux, built by Advanced Ocean Systems in 1993, and more recently Adler, measuring 135’10” (41.45 meters) and built at Lauderdale Marine Center in Florida in 2005. In fact, Crazy Me bears some resemblance to Adler.

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The husband half of Crazy Me’s owners worked closely with Gary Grant Design to ensure the megayacht reflected swoops and other dramatic curves. If you think her profile is dramatic, highlighted by shaped glass (which additionally blocks a good deal of sound and is less reflective than traditional glass), check out the closeup view of her bow, above. Here, you can really get a sense of how idiosyncratic the overall “swoosh” styling is. Even though Heesen Yachts collaborated with Van Oossanen Naval Architects for the engineering, as it does for many projects, the execution was still a challenge for both teams.

Inside, Cristiano Gatto worked with the owners on creating a contemporary atmosphere. No sketches are available of the four guest staterooms, owner’s suite, or other areas that make the most of the 32’8” (10-meter) beam. However, you can use your imagination to picture the effect that the glass-bottomed pool on the sundeck has in filtering light down to the main aft deck. You can also imagine that entertainment is a priority for the owners, since the husband designed the music system.

Delivery for Crazy Me is expected this month. The megayacht should see a 21-knot top speed (at half load) thanks to twin MTU diesel engines during sea trials.

Heesen Yachts Signs First 55m Steel Fast Displacement Megayacht

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Come summertime 2015, the first of Heesen Yachts’ 180-foot (55-meter) fast displacement, steel-hulled motoryachts will be delivered. The aggressively styled megayacht’s name is being withheld for now, but she bears the hull number YN 17255.

Last year, Heesen unveiled three proposals bearing a fast displacement hull form designed by Van Oossanen Naval Architects, with this megayacht being among them. (On a related note, this megayacht marks the fourth Van Oossanen fast displacement design being built by Heesen, and the two companies’ 10th collaboration overall.) The designs were presented to potential clients and the media alike, in response to the increasing desire among megayacht owners to lower fuel consumption without sacrificing performance. The fast displacement hull form is more fuel efficient than traditional round-bilge, hard-chine hull forms. It incorporates design changes to the spray rails, bulbous bow, and more that have a large effect on hydrodynamic resistance over the whole speed range, rather than just top speed.

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In terms of this project’s performance, twin 1,850-hp MTU 12V 4000 M53 diesels should permit a half-load top speed of 16.5 knots and a range of 4,500 nautical miles at 13 knots. Perry van Oossanen of the eponymous design firm says that only about 800 hp should be needed to make the megayacht achieve 15 knots at the half-load 600-ton displacement.

The hull form form YN 17255 is also a bit narrower than traditional yacht hulls, bearing a 31’5” (9.6-meter), beam. That’s about two feet narrower than others of this LOA. But, the amenities for YN 17255 don’t seem as if they’ll suffer. The owners get a private alfresco area and a balcony off their main-deck suite. They and their 10 guests also have a 1,184-square-foot (110-square-meter) sundeck at their disposal. As the rendering above also shows, there’s a nice-size beach club at the transom, further containing a gym. Tenders go in a garage forward, concealed behind gull-wing doors.