Category Cruising

Gunboat G4 sea trials

The all new Gunboat G4, designed by DNA has launched in St. Martin.  As usual the work list was extensive to get out on the water.  A few days after the sailing began, the final adjustments were made to the daggerboards and she set out to break new ground.  In 18-20 trade winds, the boat was up on foils and generating lots of smiles for the lucky crew.  Schickler Tagliapietra served in a support role in the development of the boat, as a new member of the DNA design team.   FEA structural simulation of boat and foils, stability calculations, VPP performance prediction and more.  Follow Gunboat or Holland Composites on Facebook for more details.

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40m Superyacht for Ghost Yachts

On the Superyacht Times, the new Ghostyachts G130SS has been revealed for the first time. ST is very proud of the outcome of the design, where we have provided naval architecture, design, and engineering services. The Ghostyachts team is putting the finishing touches on the presentation and we look forward to the next step in development and construction.

www.ghost-yachts.com

www.glossdesign.it

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Superyacht Background

Schickler Tagliapietra’s expertise in design and engineering extends beyond racers and maxis to superyachts beyond 24m LOA. A sample of the large cruisng yachts on which the ST founders have had involvment in includes: Shaman 27m, Young Cat 27m, Cinderella III 32m, Alithia 40m, Hetairos 43m, Mystere 43m, Esense 43m, Giml

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Inoxsail

ST has been commissioned for the naval architecture of the new Inoxsail daysailer. This commission was completed in the Fall of 2011 and the boat will soon be under construction. It is a boat of just 5m LOA, but has been crafted with the same attention to detail as other larger projects. As part of the shape refinement process, rapid prototyping was used to get our hands on the design in physical format.

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Cutter Yacht 66

This is a concept design prepared for ocean cruising, featuring retro styling. Visually the shape of the hull has strong roots in classic pilot cutters, but with a more sleek interpretation for a sea kindly yachting experience. On deck, modern minimalistic detailing is developed from the straightforward house and cockpit shapes, with a significant coaming for cockpit protection. The stern overhang features a long storage volume, enclosing a tender to be launched with the main boom. The rigging and sailplan of the yacht are fully modern, with a large mainsail roach. The boom is a park-avenue style with lazy jacks to facilitate mainsail control. A bow sprit carries the tack point of the headsails far forward. Powered roller furlers for the head-sails are a must for this sailplan.

On deck, the concept would be to use Harken deck hardware, with a captive reel winch for the main halyard. Magic trim rams could be selected for main and jib sheets, as opposed to hydraulically powered deck winches.

Key technical features of the design are the moderate stroke lifting keel, swept back slightly in its fluid motion, the carbon spars with 30 degree swept spreaders and no aft rigging, and the sandwich construction throughout. Lamination of the hull and deck is with E-glass/epoxy on Corecell, but features Aramid woven material below the waterline. Forward there are a pair of collision bulkheads, and aft another just in front of the twin wheels. Carbon fibre is used in all frames and on the keel box to deal with the loads.

The interior concept is a relatively open, with owners suite forward and two guest cabins aft. The main salon dominates the middle of the boat. The keel box is integrated into the interior layout, with a passage between the trunk and the owner’s head and shower and the galley on the opposite side of the boat. The crew space is forward with a separate head.

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9m Daysailer

This is a concept design for a 9m production daysailer with the requirement that two complete boats be shipped in a 45′ high cube shipping container. The brief was met with a stylish ultra simplistic appearance and operation, composite rigging and roller furling boom. The option for lifting keel version exists. Displacement is 2.2 tonnes with the fixed keel, but just 1.8 tonnes with lifting keel.

LOA 9.5 m (31 feet)

LWL 7.4m (24 feet)

Beam 2.3m (7.5 feet)

Draft 1.4 m (4.6 feet)

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56′ Med Cruiser

The Kallisto 56 is the first in a new range of yachts for this company. Hull lines and deck lay out of Kallisto 56 are a result of extensive research and testing in order to make the boat fast, light and easy to handle. Not only do the looks differ greatly from the crowd.

The yacht will be built in a series production. Two interior options are available, with either 3 or 4 cabins. More information and interior layouts available from Kallisto.

 

 

 

 

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50′ Green Cruiser

Davide Tagliapietra, Albrto Pozzo and Massimo de Luca have been successful in the next Sly 50 design contest. Their entry, the Green Cruiser 50, has beaten over 20 entries on the basis of original design ideas and technology.

The Green cruiser 50 is synonymous with: green, comfort, and performance. A composite of bamboo fibre/epoxy resin was chosen as the main material of construction due to the benefit in the net balance of emissions.

The availability of the natural fibre on a large scale, similar techniques in manufacture and good mechanical properties make it possible to replace traditional glass fibre almost completely.

Surface treatments of oil and wax are applied to the interior panels, most of which are structural and visible.
For the exterior working surfaces, treatments with low environmental impact are selected and the topsides of the hull is treated with photovoltaic paint. This completes a spectrum of choices to preserve the environment and maximize use of available energy resources.

The arrangement of space maximizes the areas for relaxation and maintains privacy. It was decided to equip each cabin with a private head, including the skipper

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45′ Daysailer

The core idea is that sailing yacht shapes are often most beautiful below the waterline. We have spent a disproportionate amount of time ensuring that faired surfaces from hull centerline to deck centerline form a single appealing body, and that the heeled and upright sailing characteristics are predictable, safe and above all fast. The underwater body is quite similar to that of a high performance keelboat. The higher freeboard creates a deeper, enclosed cockpit with real back support while seated instead of a low railing. This arrangement makes lifelines completely unnecessary. In summary, our vision for this boat is classic yacht styling, simply inverted.

The cockpit is opened up by the use of a whipstaff tiller, and sailing functions are largely handled by hydraulic rams. Two (powered) winches remain for all eventualities. Construction is carbon fibre, foam, and epoxy, obviously female moulded.

Below the water, there is a canting-lifting keel with very innovative composite motion, extending outward as it cants. This maximizes the sail carrying power for a specific draft, while reducing weight. A pair of asymmetric dagger boards provide the side force, and our deployed via pushbutton automated hydraulics.

You can see that we have a novel plan for extending the possibilities when at anchor, or tied up. The aft deck has a wet bar and gorgeous teak deck for sunning, but also offers an area of shade beneath the raised panel.

General Characteristics:

LOA 14.2m 44.5 ft
LWL 11.5m 38 ft
Beam 3.0m 9.8 ft
Draft 2.3m 7.5 ft
Displ 3.3t 7275 lb
Ballast 1.5t 3300 lb
SA upwind 94sm 1010 sf
SA downwind 185sm 1990 sf

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24′ Explorer

This 7.3 m yacht, commissioned for use on the inland lakes and coastal waters has some exceptional features. The design brief has been filled in a creative design utilizing two ballast keels raised and lowered in synchronization. The main motivation for this development is to create an unobstructed, though compact, interior in conjunction with the low draft. The keels themselves are arced inward to maximize stability, creating almost 5 degrees of static windward heel. Shifting the asymmetrically shaped foils from side to side is simply done with tackle, as the weight of each balances the other. Lifting them both requires only leading a line to one of the deck winches. The hull is shaped to take full advantage of crew weight for performance enhancing stability upwind and plane easily and smoothly off the wind.

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