3 masted yacht

Shenandoah of Sark

The 1902 classic 3-masted sailing yacht.

Welcome aboard the sailing yacht Atlantic

All about one of the most awesome classic yachts of all time, the three mast schooner Atlantic. Long time holder of the world record for the crossing of the Atlantic Ocean under sail, this one hundred and eighty-five foot schooner originally designed by William Gardner in 1903 has been relaunched and is sailing once more.

The Atlantic is currently in the western Mediterranean, and available for luxury sailing yacht charters.

John G. Alden 121 ft 3-Masted Gaff Schooner 2021

These details are provisional and may be amended

BROKER'S COMMENTS

It seems hard to believe it took so long for this magnificent vessel’s preliminary drawings to be given form. Perhaps the most authentic expression of John G. Alden’s highly successful fusion of the American fishing schooner as pleasure yacht, her 1927 design date parallels his most successful period in fast cruiser design, when his MALABARs ruled the waves. After gathering dust at the John G. Alden office for almost 90 years, along came an individual with the knowledgeable passion and vision to bring Design No. 347 to life as WOLFHOUND. All executed by the best possible people, including naval architect Niels C. Helleberg who began his Alden design career working beside the man who had originally drawn her lines. For her hull builder, Graafship, it’s the first time they’ve built a genuinely new classic schooner instead of a replica, and she was a labour of love for her finishing craftsmen. Since completion in 2021, WOLFHOUND already has two Atlantic crossings under her belt and a period of extensive Baltic cruising, all crewed by family and friends, and is very well-proven. Vindication of John Alden’s minimally crewed dream yacht for exploration adventures beyond the horizon: WOLFHOUND’s brave, wholesome appearance - very different from the replicas built for the classic regatta circuit - shouts this.

Interested in WOLFHOUND in more detail.

Enquire About WOLFHOUND Download PDF Specification

JOHN G. ALDEN DESIGN NO. 347 ORIGINAL DESIGN DATE: 1927 "His great confidence at sea and his skill as a deep-water helmsman and ocean-racing tactician were notable and were clearly grounded in experience. Combined with his eye for balance and shape, his experience gave him a unique ability to find the geometry that worked with the sea." Olin J. Stephens on John G. Alden in 'John G. Alden and his Yacht Designs' (1983) "One of the most impressive Alden designs, from the standpoint of beauty as well as size... In her profile and the shape of her sections, her Gloucester-fisherman ancestry is discernible." Robert W. Carrick & Richard Henderson in 'John G. Alden and his Yacht Designs' (1983) Alden design #347's lines were drawn for John G. Alden as the client by stalwart of the Alden office Clifford P. Swaine (1902-1992, worked with John G. Alden c. 1922-1979), a highly talented naval architect who could easily have branched out on his own, but stayed with Alden his whole working life. With no client involvement, we can easily speculate that this was Alden's dream yacht for adventures well beyond the horizon. But a client never materialised - perhaps because of the Great Depression - and the drawings for this magnificent vessel, infused with American fishing schooner genes, gathered dust until the incredibly complete John G. Alden archive became part of the Hart Collection at Massachusetts Institute of Technology when the Alden business closed in 2008, one year short of its centenary. The naval architecture career of Niels C. Helleberg (1940-2014, worked with John G. Alden 1971-2008) overlapped with Clifford Swaine. So it couldn't have been more poignant and appropriate that Helleberg would undertake the work to prepare the 20th Century drawings for a 21st Century build. Design #347 is a preliminary design that includes the final lines, two different rig and sail plans (a 2-masted and a 3-masted version), as well as a 3-masted accommodation plan. The 3-masted sail plan is by far the more spectacular design of the two. However, no detailed construction drawings were produced for this design in 1927. For this reason some of the details in the implementation were inferred from other Alden designs from the same time period. Helleberg was instrumental in creating this design in the the spirit of the 1920s Alden steel schooners. A number of details and specifications from the final Design #284 of STARLING (launched in 1926), including the 530 mm frame spacing, were used as a guide to finalise the #347 construction drawings faithfully in the spirit of John G. Alden. Although the preliminary design indicated that she would be built in wood, the final design is implemented in welded steel. The implementation in steel is consistent with the materials Alden used for most of his larger schooners from the era. However, to honor the heritage of the preliminary line drawings, the hull lines for the steel construction of WOLFHOUND retain what would have been the wood hull's moulded stem, the rabbet line, and the recessed bulwarks normally only seen on wooden hulls. From a distance she looks like a wood construction. WOLFHOUND is a very simple and straight forward yacht. John Alden wrote in his designer's notes about the intended small crew and general approach: “A three-masted schooner of this length is handled by a total crew of five men for coast wise work and seven when offshore, including the cook. There is no reason why this boat should require more if fittings are kept simple and plain. Of course the cost of construction is reduced to a minimum.” The theme, or philosophy, for the WOLFHOUND project from 2012 and onward would be AUTHENTICITY and EXTREME SIMPLICITY in the spirit of John Alden’s general philosophy expressed in his designer's comments.

GRAAFSHIP YARD NO. 455 - To Lloyd's A-1 specifications with a Lloyd's hull certificate Small to medium sized Dutch steel shipbuilders have long been held in high renown for a no-nonsense approach to the production of beautifully constructed, perfectly fair yacht hulls - often eventually carrying the name of the more famous yacht finisher they were built for. For over 20 years Graafship of Dordrecht, formerly Van der Graaf lasonderneming B.V. of Hardinxveld-Giessendam, have gained a particular reputation for classic schooner creations and re-creations, including ELEONORA (2000), NAEMA (2006), ATLANTIC (2010), INGOMAR (2012), and WOLFHOUND (hull completed 2016). Laid down in 2013, WOLFOUND was barged to Enhuizen in 2016 for the fit out by Opus Five Ltd. and André ten Broeke, with the major deck structures built by Absolute (Portugal). The rig was built by SRF Shipbuilding in Harlingen, and dressed by MdeGroot of Staveren. WOLFHOUND was commissioned in 2021.

CONSTRUCTION

- Welded steel hull to Lloyd's Grade A-1 specifications - Lloyd's Hull Certificate - 41 Tonnes poured lead keel ballast - Afzelia doussie 17 mm laid deck - Laid with Sika approved system - Steel deck substrate, faired and epoxy primed - Varnished teak deck superstructures

DECK LAYOUT, EQUIPMENT, AND GROUND TACKLE

GENERAL - Afzelia doussie laid deck - Teak capped steel bulwarks - 4 x Bronze Panama fairleads port and starboard - Associated bronze bollard cleats - Painted steel scuppers - Bronze stanchions; rope guardrails FROM AFT - Bronze mooring fairleads port and starboard - Bronze ensign staff socket - Bronze mizzen boom gallows - Bronze mizzen sheet horse - Mizzen sheet tackle - 2 x Electric Harken flat top bronze mizzen sheet winches - 2 x Manual Harken self tailing bronze running backstay winches HELM - Steering box - Traditional ship's wheel - Retracting teak laid lid over helm dash - Chart plotter screen - VHF Radio - Kobelt bronze throttle and gear control - Bronze Propeller pitch control - Steering wheel bypass control (when autopilot in use) - Thruster controls - Hydraulic steering joystick - Switches including for horn and rig lights - Alarms - Danforth bronze binnacle with steering compass SEATING AREA - Seats port and starboard of table aft - Table is also hatchway to Lazarette LARGE LAZARETTE/ SAIL LOCKER - And steering flat PILOTHOUSE - Companionway hatch offset to starboard - Double doors and sliding hatch - 3 x Windows port and starboard - 3 x Bronze ports forward - Davit at rail to starboard for boarding companionway ladder NEAR/ AT MIZZEN MAST - Pin rail - Raised skylight over master suite - Bench seat/ stowage boxes to port and starboard - Bronze mainsheet horse - Associated tackles and bronze cleats - Main mast running backstay tackles - Bronze nuns-cape fairleads port and starboard - 2 x Harken 980 BBB electric winches - Davit at rail to starboard for boarding companionway ladder FORWARD ACCOMMODATION COMPANIONWAY HOUSE - Large bronze engine room vent cowls port & starboard on dorade boxes - Bronze mushroom vents port and starboard - Double doors and sliding hatch - Lean-to skylights over port and starboard guest cabins - Inflatable tender stowage over - Stowage boxes port and starboard NEAR/ AT MAINMAST - Pin rail - Bronze foresail sheet horse - Associated tackles and bronze cleats - Foremast running backstay tackles - Bronze nuns-cape fairleads port and starboard - Raised skylight over saloon - 2 x Harken 980 BBB electric winches PROVISION FOR LAUNCH/ TENDER DECK STOWAGE - At starboard side deck - Large tender davits with strongbacks at port and starboard rail FORESCUTTLE - Double doors and sliding hatch - Bronze cowl vents to port and starboard on dorade boxes - Lean-to skylights to port and starboard NEAR/ AT FORE MAST - Ship's bell - Pin rail - Bronze staysail boom sheet horse - Associated tackles and bronze cleats - Bronze nuns-cape fairleads port and starboard - Anchor stowage port and starboard in cats - 2 x Harken 980 BBB electric winches FOREDECK - Bronze vent cowl on dorade box - Absolute custom hydraulic/ manual windlass - 2 x Chain gypsies - 2 x Horizontal warping drums - Manhole and ladder access to chain locker - Bowsprit fittings GROUND TACKLE - 2 x 300 kg traditional anchors - 1 x 200 m of 20.5 mm Lloyd's stud link chain to port - 1 x 300 m of 20.5 mm Lloyd's stud link chain to starboard

OWNER AND GUEST ACCOMMODATION

WOLFHOUND’s interior is built in a high quality authentic 1920’s panelled style. All the sipo mahogany wood for the entire yacht came from one single log and is treated with hard wax. The sole is white oak, oil treated. The white surfaces are painted with Epifanes 'Wolfhound White' satin finish. Most of it is hand painted for authenticity. Hardware is period style and the saloon furniture was designed in 1924 by Marcel Brewer, and 1928 by Le Corbusier. PILOT HOUSE AFT - 4 x Teak steps down - Teak panelled - Laid doussie sole - Raised banquette aft to port - Stowage outboard to port and starboard - Vary large stowage area under sole (via folding lower stair) - Lift lid navigating and control station port forward - Signal flag stowage under - Fiddled shelves to port and starboard - Adjustable height expanding table - 4 x bulkhead lamps with shades - Deckhead light - Concealed climate control air handler for cooling and heating - Barometer - Companionway offset to starboard to Aft Master Suite AFT MASTER SUITE - 4 x Steps down from deck house Lobby area to starboard - Settee to starboard - Alcove pilot berth outboard - Bronze porthole - Concealed climate control air handler for cooling and heating - Workroom to starboard forward - WC/ Shower compartment aft - Tecma Silence Plus toilet - Concealed sink in workroom top surface - Engine room access door Master Cabin to port - Double door - Large double berth; stowage under - Hanging lockers; chests of drawers - Bronze porthole - Bulkhead lamps - Reading lamps - Deckhead lights - Concealed climate control air handler for cooling and heating En-Suite Forward to Port - Double sink unit to port - Mahogany top - 2 x Patterned ceramic inset sinks - 2 x Mixer taps - 2 x Mirrors - Lockers and drawers under - Towel rails - WC/ shower compartment - Tecma Silence Plus toilet - Bronze porthole - Bulkhead and deckhead lights Return to Pilot House FORWARD VIP/ GUEST ACCOMMODATION - Access via mid deck companionway house - 10 x Steps down - Lockers port and starboard - 2 x Bulkhead lamps with shades in stairwell VIP CABINS TO PORT AND STARBOARD STARBOARD VIP/ GUEST CABIN - Large double berth - Chest of drawers - Bronze porthole - Skylight in deckhead - Concealed climate control air handler for cooling and heating - 2 x Bulkhead lamps - Reading lamps - Deckhead lights En-Suite - Sink unit to port - Mahogany top - Patterned ceramic inset sink - Mixer tap - Mirror - Lockers and drawers under - Towel rail - Tecma Silence Plus toilet - Shower compartment - Skylight in deckhead - Bronze porthole - Bulkhead and deckhead lights PORT VIP/ GUEST CABIN - Large double berth - Chest of drawers - Bronze porthole - Skylight in deckhead - Concealed climate control air handler for cooling and heating - 2 x Bulkhead lamps - Reading lamps - Deckhead lights En-Suite - Sink unit to port - Mahogany top - Patterned ceramic inset sink - Mixer tap - Mirror - Lockers and drawers under - Towel rail - Tecma Silence Plus toilet - Shower compartment - Skylight in deckhead - Bronze porthole - Bulkhead and deckhead lights SALOON - Sideboards port and starboard - Le Corbusier seating to port - Dining to starboard - Concealed climate control air handler for cooling and heating

CREW/ ADDITIONAL GUESTS ACCOMMODATION

WOLFHOUND's forward accommodation arrangement allows much flexibility in crewing arrangements depending on the hands-on with friends, or fully, or partially professionally crewed desires of her owner. 'COOK'S CABIN' TO STARBOARD - Single berth - Stowage under - Hanging locker and drawers aft - Bronze porthole - Reading light - Deckhead light En-suite aft - Shower - Tecma Silence Plus toilet - Sink unit to port - Mahogany top - White ceramic inset sink - Mixer tap - Mirror - Lockers and drawers under - Deckhead light 'CREW MESS' FORWARD OF GALLEY - Offset to port - Table - L-Seating - Locker - Gimballed lamp - Deckhead light - Half skylight in deckhead - Half model - Climate control air handler for cooling and heating 'CAPTAIN'S CABIN' TO STARBOARD - Double berth - Drawers under - Hanging locker - Half skylight in deckhead - Reading light - Deckhead light En-suite forward - Shower space with glass door - Tecma Silence Plus toilet - Pullman sink over - Mixer tap - Mirror - Deckhead light 'CREW CABIN' - Single berths port and starboard - Upper berths port and starboard - Shelves over - Hanging locker and locker - 2 x Reading lights - Deckhead light CREW CABIN WC/ SHOWER COMPARTMENT FORWARD - Shower - Tecma Silence Plus toilet - Sink unit to port - Mahogany top - Patterned ceramic inset sink - Mixer tap - Mirror - Lockers and drawers under - Bulkhead lights - Access forward to chain locker

GALLEY AND DOMESTIC EQUIPMENT

- SMEG Victoria oven/ microwave - Siemens 4 x burner induction hob - Isotherm top loader 24 V Fridge/ Freezer - Bosch tall refrigerator - Bosch tall freezer - Miele dishwasher - Siemens iQ700 washing machine - Siemens iQ700 tumble drier - Stainless steel sink; mixer tap - 2 x Gimballed pendant lamps - Pan stowage outboard - Stainless steel surfaces - Lockers - Bronze porthole

RIG, SAILS, AND CANVASWORK

Max Speed under sail: 14.0 kn RIG - Hollow laminated wood spars: SRF Shipbuilding, Harlingen, Holland - Lower masts: Siberian larch - Topmast, gaffs, and booms: Douglas fir - Bowsprit: Sitka spruce (solid) - Standing rigging by M deGroot, Stavoren, Holland - Galvanized shrouds (to Lloyd's scantlings) - Stainless steel headstays (to Lloyd's scantlings) SAILS By UBS, Medemblik, Holland - Mizzen (fitted with extra, 'feathering sail' reef) - Main - Fore - Mizzen topsail - Main topsail - Fore topsail - Boom staysail - Jib - Jib topsail - Yankee - Gollywobbler for main - Gollywobbler for fore Sail Areas: - 5 x Lowers: 5,532 sq ft / 514 sq m - All 9 x upwind sails: 7,534 sq ft / 700 sq m - Main Gollywobbler: 2,260 sq ft / 210 sq m - Fore Gollywobbler: 2,131 sq ft / 198 sq m - Yankee: 1,614 sq ft / 150 sq m - Unfurled: 12,819 sq ft / 1191 sq m Sail Area / Displacement Ratio: - (100% fore triangle): 20.3 CANVASWORK - Covers for all deck structures and winches

MECHANICAL, ELECTRICAL, AND TANKAGE

MECHANICAL - Main engine: 1 x Volvo D13-MH(FE)1800 RPM 500 hp continuous use rating - Dual Racor fuel filters on main fuel manifold - Max speed under engine: 11 knots - Hull speed: 12.8 knots - Gearbox: ZF Marine W350-1 (3.96:1) - Propeller: Hundested, Variable Pitch 4-bladed, 1.4 m diameter - Bow thruster: Hundested FT3 hydraulic MECHANICAL ELECTRICAL - 2 x Northern Lights Generators 864W3, 50 Hz, 240 V AC, 3-phase, 20 kW ELECTRICAL SYSTEM DESCRIPTION - AC system is effectively hybrid, configured as follows: - One generator connected to primary input of Victron inverter chargers - One generator connected to the shore power input - The Victron Quattro charger inverters config'd to provide 3-Phase 240/400 V AC - serviced by 3 x 24 V Victron lithium batteries (3 x 5 kWh = 15 kWh) - All AC supplied from Victron Quattro 8 kW charger/Inverters - (3 x 8 kW = 24 kW steady state capacity & 48 kW peak power capacity) - Also a Victron Universal charger for main house battery bank - effectively act as the shore power connection - Also a Victron Phoenix 110 V AC 60 Hz inverter for the 100 V AC outlets - Most of the AC pump motors run in 3-phase 400 V config. for max reliability ELECTRICAL EQUIPMENT SUMMARY (main components): - 2 x Northern Lights 20 kW 50 Hz, 240/400 V AC gensets - 3 x Victron Quattro 8 kW inverter chargers - 3 x Victron 24 V Lithium batteries (5 kWh) - 1 x Victron Skylla 24 V charger - 1 x Victron Phoneix 100 V inverter HYDRAULIC - Dedicated industrial grade redundant VFD controlled power pack - 3-phase 240/400 V AC) - Dedicated hydraulic tank for auto pilot located at lazarette TANKAGE AND ASSOCIATED EQUIPMENT Fuel - 2 x Main tanks; - 1 x Day tank 300 L / 79 US Gal - Total : 17,800 L / 4,700 US Gal Fuel Pumps - Fuel transfer pump and manifold from the 2 main fuel tanks - to supply the day tank with an automatic refill system - Main fuel pump can also transfer between two main fuel tanks - Manual backup fuel transfer pump to supply the day tank Motor Oil - Port tank new oil 300 L / 79 US Gal - Starboard tank used oil 300 L / 79 US Gal - Reverso lubrication oil pump piped directly to generators & main engine Fresh Water - 3,200 L / 845 US Gal Water Pumps - Redundant fresh water pump for the ship - Main pump: high-capacity VFD controlled SPECK BS40 bronze piston - Plus a low capacity 24 V backup fresh water pump Black water - 3,200 L / 845 US Gal - Sump tank 300 L Waste Pumps - Sump tank evacuated by Edson VFD controlled diaphragm pump - Manifold for pump out options: - directly over board - into the black water tank - or via a deck waste water hose connection - Grey water is emptied into the main sump tank via gravity - in normal operating mode set be pumped over board - Black water tank is evacuated via a manual valve into the sump tank - and pumped over board when sailing offshore - or pumped out via deck waste water hose connection to shore OTHER Water maker: - Spectra Farallon 2800 gpd (50Hz, 400 V AC 3-phase) Air Conditioning: - Northern Lights Technicold 120,000 BTU Heating: - Kabola 20 kW & Electrical 8 kW 240/400 V AC 3-phase Engine room ventilation: - Delta T Systems Air compressors: - Dedicated 220 V AC air compressor for ships horn - Bauer Jr. dive compressor 400 V AC 50 Hz - Hydraulic PredAir worm gear compressor for main bilge pump - powered from main engine hydraulic pump Active Galvanic Protection System: - Active Electro-Guard system - 6 x Hull mounted Stanium oxide anodes - 1 x Hull mounted sensor - Used by the US navy on some of their vessels

NAVIGATION AND COMMUNICATIONS

NAVIGATION - Danforth Skylight Constellation steering compass - 2 x Garmin Chart Plotters - Simrad Class "A” AIS - iPad Pro for Predict Wind weather routing software - Cassens & Plath Horizon Ultra sextant COMMUNICATIONS - Simrad VHF with DSC - Iridium 60 satellite unit

LIFE SAVING - 2 x Two Viking 8-person off-shore valise life rafts - EPIRB mounted in the pilot house - Standard set of Solas flares, rockets, and smoke flares - 8 x PFDs w. AIS trackers programmed to chart plotter and DSC VHF - Emergency first aid medical valise FIRE - Xintex centralised alarm system - Smoke sensors in: - cabins, saloon, pilothouse, lazarette, service isle, engine room - Fire alarm audio and strobe annunciators in: - galley, main companionway, engine room, pilot house companionway - Manual fire alarm pulls handles mounted at: - each of the three companionways and in the engine room - Fire blankets in the galley and pilot house - 5 x Manual extinguishers located at: - galley, salon, master cabin, pilot house, lazarette - FireBoy Xintex auto temperature triggered engine room system: - auto engine, generators, and blowers/ louvres shut down - Reset button at pilot house - High-capacity salt water fire pump located in the engine room - Ttorx coupling for the fire hose on deck - Start button, fire hose, and fire nozzle located in the main companionway BILGE PUMPING - Located in each of the watertight compartments - (chain locker, crew quarters, main service isle, engine room, cabins, and lazarette) - Low capacity 24 V electric bilge pumps - Bilge water alarms for condensation water etc. - Traditional bilge pump in the chain locker - Traditional bilge pump in the the lazarette/ sail locker - Main emergency high-capacity pneumatic sludge rated diaphragm bilge pump: - Pumps 2000 2 inch slurry pump - located at the main companionway - manifold to for selection of evacuation locations: - the crew area, saloon and VIP guest area, engine room, and cabins - The main bilge pump is provided with compressed air from a dedicated gear pump - using power from the main hydraulic pump on the main engine OTHER - Compressed Kockums Supertyphoon compressed air horn at mizzen speeders - Automatic fog horn controls for the air horn and manual horn at the helm box

OTHER EQUIPMENT

- Talamex Heavy Duty inflatable aluminium floor tender

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These particulars have been prepared from information provided by the vendors and are intended as a general guide. The purchaser should confirm details of concern to them by survey or engineers inspection. The purchaser should also ensure that the purchase contract properly reflects their concerns and specifies details on which they wish to rely.

Sandeman Yacht Company

Brokerage of classic & vintage yachts.

3 Masted Schooner

Schooner – a sailing vessel with fore and aft sails on three masts. The foremast being shorter than the mainmast which is no taller than the mizzen mast. Originally gaff rigged, nowadays many carry bermudan sails.

In the photos above the Camper & Nicholson Schooner Creole , due to her sail configuration, is known as a staysail schooner, whereas Adix and Shenandoah are both gaff schooners.

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Sea Eagle II: The inside story of the world’s largest aluminium sailing yacht

• June 17, 2020

Rupert Holmes talks to the build and design teams behind the 81m Royal Huisman flagship Sea Eagle II, which recently completed her sea trials off the coast of the Netherlands

Royal Huisman has an enviable track record of producing superlative sailing superyachts , with hundreds of projects completed to date. Yet the latest vessel to leave the shipyard is extraordinary even by these standards. She is the world’s largest aluminium yacht and is one of the top ten biggest sailing yachts ever built. 

Sea Eagle II is a magnificent 81m/266ft three-masted Panamax schooner, created by the same Dykstra and Mark Whiteley Design collaboration that produced the stunning 56m/186ft Royal Huisman ketch Aquarius just over a year ago. 

Her very experienced owner has sailed all his life and spent a lot of time at sea. “ Sailing around the world in the weekends is a phrase often used to outline his days on board,” says Royal Huisman project manager Arjo Spans. He is also a repeat client – the original Sea Eagle is a 43m/143ft Frers/Rhoades Young design launched by the Dutch yard in 2015. 

Sea Eagle II is due to be delivered to her owner in July 2020. Photo: Tom Van Oossanen

Initially the brief for the new boat was for a more classical yacht, similar to the 79m/259ft three-masted gaff schooner Athena , which Royal Huisman built for Silicon Valley mogul Jim Clark in 2004. However, the owner quickly realised he would prefer a more modern yacht: a fast-looking hull shape with straight lines, long waterline and plumb bow. The concept of Sea Eagle II was born. 

“Having worked with him to build the original Sea Eagle , we understood the owner’s priorities from the start,” says Spans. “These are: low maintenance, functionality, and safety, including ease of moving around the yacht, even when heeled at sea.

“For each of the key aspects of the boat he asked for three proposals, he would then choose one of them and leave us to implement it,” Spans adds. “He put a huge amount of trust in the shipyard and in our craftsmanship.”

Article continues below…

Sailing around Cape Horn on the world’s largest ketch Aquijo

When asked to help guide the 86m/282ft ketch Aquijo for a cruise in Tierra del Fuego and a Cape Horn…

Royal Huisman reveals 116ft ‘floating resort’ catamaran superyacht concept

“This is not a change in direction; it is an expansion of possibilities,” says Jan Timmerman, CEO of the 136-year-old…

The scale of this yacht is nothing short of astounding. The sleek hull lines belie the 4m/13ft freeboard and the two-tier deckhouse, including a half-raised bridge, looks entirely in proportion. The main deck-level accommodation has a huge expanse of glass, with the 360º view interrupted only by minimal mullions. There are also acres of cockpit space, with room left over for a long sweep of uncluttered aft deck.

Mark Whiteley was responsible for developing the interior and refining the exterior styling. He created a simple and modern style for the interior, with straight lines. Lacquered Alpi walnut wall panels, brushed natural oak floors and dark stained wenge trims are complemented by light colour leather handrails and upholstered wall panels.

Part of the brief was for the yacht to be able to host business meetings – the forward part of the superstructure therefore includes a large saloon with expansive seating, plus a 16-seat table for formal dining.

The largest winches are capable of a tremendous 18-tonne pulling load. Photo: Rondal

A technical challenge 

Dykstra Naval Architects drew a narrow and efficient hull shape with a maximum beam of only 12.4m/40ft, while displacement has been kept down to a relatively light 1,050 tonnes at full load. The final shape was achieved following extensive computational flow dynamics (CFD) calculations, velocity prediction programming (VPP), and testing in both tow tanks and wind tunnels. These all helped to determine sail balance, keel position and predicted rudder angles.

The plumb bow is balanced by a modest, but graceful, stern overhang, with a contemporary, relatively wide transom at deck level. Twin knuckle lines extend aft from near the bow, merging into one amidships and then forming a chine aft. Right aft the hull has negative curvature on the flare below the chine, which gives interesting reflections in the gleaming paintwork.

The lead naval architect, Dykstra’s Erik Wassen, told me he introduced the knuckle lines to give the hull “a bolder and more interesting shape.” The owner liked the concept and Mark Whiteley helped to refine the detail. Wassen describes the underwater shape as being: “a very modern round bilge shape, with a nice slender hull that gives good sailing capabilities.” Appendages are a conventional fin keel and balanced rudder.

Photo: Priska van der Meulen

The latter presented an interesting technical challenge, according to Wassen. Initially they looked at fabricating the rudder stock in steel, but that alone would weigh three tonnes. Screening a number of alternatives led to a decision to use carbon for the stock, with a foam core section clad in a relatively thin composite skin for the blade. 

The result is what it’s producer, Royal Huisman’s sister company Rondal, believes to be the biggest ever carbon rudder, weighing only 1,250kg, which helps to keep weight out of the ends of the boat. The weight saving here also enabled the intended fore and aft trim to be achieved with the ballast in its optimal location.

The rudder includes load sensors to record and verify torque, side forces and bending moment while sailing. “There is not much load data available for rudders of this size of sailing yacht, so it’s very conservatively engineered,” says Spans. Fibre-optic sensors are incorporated to enable a database to be created that will help with designing future composite rudders for very large yachts.

Due to the distance of the helm stations from the rudder, the steering is via an electric-hydraulic system, which means there’s no feedback from the helm. The plan is to investigate whether data from the sensors can be used in a feedback system to give a more natural feel to steering the boat under sail. 

Structural engineering

This is one of the most interesting elements of yacht design, yet is all too often under appreciated. Extensive modelling showed a couple of unexpected problems that needed clever solutions during Sea Eagle II ’s design and engineering. 

Instead of the hull flexing smoothly under load, like an I-beam, the presence of a forward intermediate deck introduced hard spots in this area, resulting in stress concentrations at the forward end of the superstructure. This required a lot of design work to create a smooth transition of stress from the lower deck to the intermediate one and then on to the upper deck.

Structural engineering was extensively modelled for Sea Eagle II

The roof of the superstructure also posed a challenge, in that the inside surface of a beam needs to become shorter as it flexes. But the original plan for the aluminium roof wasn’t able to accommodate this, with the result the modelling showed stresses concentrating in the corners of the mullions and in the glass itself. 

The solution was to avoid welding the top of the mullions to the roof, opting instead for a flexible joint that allows for movement when necessary. Wassen likens it to the joints in large buildings that need to be included to allow for thermal expansion and contraction.

Whiteley also helped to refine the exterior styling. In addition to the detail of the knuckles, his input helped to refine the shapes – particularly curves and softening corners – in the superstructure.

COVID-19 restrictions meant her delivery date had to be pushed back by 3 months. Photo: Crea Fragma / Rondal

Panamax rig

The requirement to be able to clear the Bridge of the Americas at the Pacific end of the Panama canal called for the schooner rig with three equal masts. All are of carbon and are made by Rondal, with integrated sail handling systems and Carbo-Link carbon standing rigging.

Each mast has in-boom furling, while the aft two have staysails for use when reaching. The tank and wind tunnel testing was used to verify different headsail options, particularly to determine the differences between a large blade jib versus a large staysail or yankee.

“Obviously you have better windward performance with a large blade,” says Wassen, “but as soon as you bear away the yankee is much more forgiving in trimming, so we decided that made more sense.” A further advantage is that when the yankee is part furled the sheeting point remains the same. 

Rondal’s Integrated Sailing System consists of the three carbon Panamax masts with furling booms, hydraulic boomvangs, headsail furling systems, deck winches and equipment, captive winches and continuous solid carbon standing rigging by Carbo-Link, all equipped with load sensing capabilities. Photo: Rondal

In addition, a blade jib requires much higher sheet loads to maintain leech tension. Even though Sea Eagle II is a three-masted yacht, the yankee sheet loads are still predicted to reach 18 tonnes – but this still allows standard-size captive winches to be used, rather than larger custom-made units.

The Panamax limitation obviously poses the question as to whether sail area needed to be compromised to fulfil this criteria. However, this is clearly not the case for Sea Eagle II . Hull speed is close to 20 knots and the yacht is clearly capable of surfing at much higher speeds, despite being designed as a pure cruiser. This role, of course, suggests keeping heel angles to a maximum of 10-15°. 

Nevertheless, the VPP figures suggest potential boat speeds of 17-18 knots in 16 knots of true breeze with a true wind angle of 70°. “As soon as you can ease the sheets a little bit, we have a lot of sail area,” says Wassen, “so on a beam reach, I wouldn’t be surprised if a steady 20 knots is possible.” 

Specification

LOA: 81m (266ft) Air draught: 62m (205ft) Hull: Aluminium Guest accommodation: 11 Crew accommodation: 14 Exterior styling: Dykstra Naval Architects and Mark Whiteley Design Naval Architecture: Dykstra Naval Architects Interior design: Mark Whiteley Design Classification: Lloyd’s MCA (LY-3)

First published in the April 2020 edition of Supersail World.

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KORU yacht NOT for charter*

127m  /  416'8 | oceanco | 2023.

Owner & Guests

• Previous Yacht

Special Features:

• 2nd Largest sailing yacht in the World
• Built for Amazon founder Jeff Bezos
• Additional power source from kinetic energy generated by the sails
• Large swimming pool main deck aft
• Wealth of toys and accessories
• 75m (247ft) support vessel ABEONA
• Innovative kinetic energy recovery system to covert wave-induced motion for sustainable cruising

Sailing yacht KORU offers the last word in innovative design coupled with a wealth of luxurious amenities for the very best sailing experience for her guests.

The 127m (416'8") Oceanco sailing yacht KORU (previously known as Y721) represents one of the largest sailing yachts in the world, with an impressive internal volume of 3,300 GT and wealth of luxurious accommodation and amenities.

Commissioned by entrepreneur and Amazon founder, Jeff Bezos, the 3-masted schooner KORU, known throughout the build as Project Y721 replaces Oceanco’s BLACK PEARL  for second place in the world's largest sailing yacht rankings behind Nobiskrug's 143m (469ft)  sailing yacht A , and operates under the Cayman Islands' flag.

Exterior Design

Reportedly taking its design cues from the 93-meter Lurssen sail yacht EOS, the yacht features a midnight-blue hull with an elongated bowsprit and traditional canoe stern, with classic lines reminiscent of some of the finest schooners in the world. As expected from a tech entrepreneur, known for pushing boundaries and driving innovation, sailing yacht KORU is trialing a prototype for a new kinetic energy recovery system. This is based on a conversion of wave induced motion, heave, pitch and roll into electric energy, with initial tests showing early promise. With a nod to her green credentials, this will provide an additional power source for the yacht allowing for more enhanced sustainable cruising.

Interior Design

Oceanco's newest yacht is understood to have an internal volume of 3,300 GT and will undoubtedly offer a wealth of luxurious accommodation and amenities. Sailing yacht KORU benefits from full-length windows across her superstructure allowing plenty of light to infuse her elegant interiors. 

Guest Accommodation

With her wide beam the 127-meter sailing yacht KORU offers generous accommodation for her guests, equipped with the finest linens and state-of-the-art technology.

Onboard Comfort & Entertainment

Sailing yacht KORU is served by the 75-meter (247ft) Damen support vessel ABEONA  (ex-Wingman). This yacht will be equipped with KORU's larger toys, rumored to include a submarine for thrilling excursions beneath the waves a la Jules Verne, plus a helicopter and landing pad. She is also believed to house an array of PWCs, as well as a speed boat and a luxury car, as well as providing accommodation for additional crew and staff.

Although we have little information about the yacht's features, we do know that she will have an aft dip pool on her main deck, along with a further Jacuzzi on her sundeck and variety of alfresco social spaces. Pictures show that she also has a crow's nest attached to her central mast, offering lofty panoramic views for her more adventurous guests.

Access to sailing yacht KORU will be via folding side passerelles, discreetly hidden in the yacht's hull on either side. Rescue and work tender launches will likely take place further forward, as per regulations. Recent pictures show a large hatch opening in her lower deck aft, which may contain further tenders and toys, but may also double as a beach club. 

Performance & Range

KORU is a 3,300 GT sailing yacht, built with a steel hull and aluminium superstructure, with teak decks. She was built to Lloyds Register ✠ 100A1 SSC Yacht Mono, G6, ECO(IHM) ✠ LMC UMS classification society rules.

*Charter Koru Sail Yacht

Sail yacht Koru is currently not believed to be available for private Charter. To view similar yachts for charter , or contact your Yacht Charter Broker for information about renting a luxury charter yacht.

Koru Yacht Owner, Captain or marketing company

'Yacht Charter Fleet' is a free information service, if your yacht is available for charter please contact us with details and photos and we will update our records.

Koru Photos

Koru Awards & Nominations

• Yacht Style Awards 2024 Superyachts over 80m Nomination

NOTE to U.S. Customs & Border Protection

Specification

S/Y Koru

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Three-masted barque

• Related ships

Robust and original

The three-masted Artemis is an astonishing example of nautical tradition. The ship was built in Norway in 1926 for whale fishing. Later on it was used as a cargo ship between Asia and South America.

The Artemis is sailing since 2001 on the North European waters to honour the glory of the Dutch sailing fleet! The Frisian Tall Ship Company bought the Artemis at the end of the last century and built it with a lot of love and a sense of detail back into a stunningly sailing ship. Now she crosses the seas to historic port cities or to one of the many nautical events.

Robust and original, that is the appearance of the Artemis. At the same time, the ship offers high comfort and luxury. It is precisely this combination that makes the ship unique and loved by international events and sea voyages. The barque has an attractive maritime salon with bar and a small hotel kitchen.

The Artemis can accommodate up to 120 people. Her guests can look forward to experienced and enthusiastic service staff and excellent catering. And of course, on a great nautical experience aboard on this unique three-master with a driven sailing crew, the most modern navigation equipment and fully prescribed safety equipment for the big voyage.

Welcome to the rich history of the Dutch sailing heritage. Welcome to the Artemis!

the Netherlands

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Visited sail amsterdam

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85 m 3-masted Schooner

A fascinating consequence of the demise of the cruise ship industry during the COVID-19 pandemic has been an attempt to bridge the gap between the private superyacht charter market and that of the ubiquitous cruise liner. HDNA has been asked to design an 85m three-masted schooner to be built in steel with aluminium spars for economy. Built to the Passenger Yacht Code she will be capable of accommodating 36 paying guests in genuine luxury. With extensive sun bathing and on-deck seating areas, a spa and two topsides opening doors to form balconies, she will have many appealing features and be able offer a genuine sailing experience with guest involvement. Hybrid diesel electric propulsion will be part of hydrogeneration capability provided by her free-wheeling propeller when sailing at her anticipated 18-20 knots.

LOA     278ft

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