Archive for the ‘Stratis’ Category

Over 1 Ton of Sails | S/Y Ohana

Superyacht Ohana will feature over 1 ton of Doyle Sails

Superyacht Ohana will feature over 1 ton of Doyle Sails

Superyacht Ohana will have over 1 ton of Doyle sails on board.

Built by Fitzroy Yachts and designed by Dubois Naval Architects, Superyacht Ohana is a breathtaking 50-metre Flybridge Sloop, currently undergoing sea trials before her delivery in December.

With a total sail area of 4,085 m2 including her main sail of 636m2 and a gennaker of 1,600m2, Ohana will achieve a maximum speed of 18 knots under sail.

Superyacht Ohana will have over 1 ton of Doyle and Doyle Stratis on board. Ohana will be one to watch at the New Zealand Millennium Cup 2013 – the yacht’s first regatta.

See the photos below including the forklift used to lift the Mainsail and Staysail out of the loft and onto the delivery trailer.


LOA: 49.7m
LWL: 44.6m
Beam: 10m
Draught: 5.5m
Displacement: 370 tons
Rig: Southern Spars
Engine: Caterpillar C32 ACERT (1400 BHP)
Accommodation: Owners Cabin, 4 x Guest Cabin Aft, 1 x Guest Cabin Forward, 4 x Crew Cabins
Builder: Fitzroy Yachts
Naval Architecture: Dubois Naval Architects
Exterior Design: Dubois Naval Architects
Interior Design: Owner and Fitzroy Yachts
Sailmaker: Doyle Sailmakers New Zealand


Boat International: Sailing yacht Ohana begins sea trials Fitzroy Yachts launch 50m flybridge sloop ‘Ohana’ Fitzroy Yachts launches 50 metre flybridge sloop Ohana Dubois Naval Architects comments on recently launched Ohana
Dubois Design: Ohana launches from Fitzroy Yachts

Mike Sanderson Joins Forces with Doyle Sailmakers New Zealand

Doyle Sailmakers is pleased to announce the appointment of renowned world class sailing professional Mike Sanderson. Mike will be joining the team at the beginning of June 2011 as Director of Sales and Partner for the Doyle New Zealand and Sydney operation.

Doyle New Zealand’s Managing Director Chris McMaster comments, "We have achieved considerable growth in recent times and the development and ongoing R&D with Stratis puts us in an ideal position now to join forces with one of the most influential professionals in the world of sailboat racing. Mike’s experience and personality perfectly complement our business; this development will allow us to increase the pace of our expansion into the Grand Prix sailboat racing market.”

Mike Sanderson was ISAF Rolex World Sailor of the Year in 2006, a veteran of three America’s Cup campaigns and two times Whitbread/Volvo Ocean Race winner.

Mike brings with him a wealth of experience having been involved on the technical side of sail programs and as part of the design and build teams for both Team ABN AMRO boats, as well as Skippering ABN AMRO One to one of the most convincing Volvo victories in the race’s history.

In addition, Mike has extensive Superyacht experience including the high profile race boats Mari Cha III and IV, which between them have dominated the Trans Atlantic Monohull record over the last twelve years.

Mike Sanderson and Head of Design, Richard Bouzaid, together present a formidable team with a huge amount of knowledge, skill and contacts in this field. Between them they have been involved at the premier level of America’s Cup, Volvo Ocean Race, Grand Prix racing, as well as local campaigns on both the technical side as well as in sailing capacities.

The knowledge base at Doyle Sailmakers with respect to design and sail making is now second to none, and combined with the high performance results being achieved by Stratis laminates, Doyle Sailmakers can continue to offer their customers the optimum sail product.

Doyle Sailmakers’ increasing share of the market can be credited to the success of the Stratis facility and the company’s continual commitment to innovation and advancing design.

2011 St. Barths Bucket Brings Together World’s Largest Superyachts

Doyle Sailmakers is proud to have sponsored the St. Barths Bucket Regatta held March 25-27, 2011. This year marked the 25th year of Bucket racing – and the 15th edition of the St Barths Bucket. Of the 40 superyachts competing in this legendary event, 15 were new to the Bucket fleet. The average length of yacht was a staggering 64 meters. Lined up bow to stern, the yachts would measure almost three kilometers.

Maltese Falcon at 2011 St Barths Bucket

It was a spectacular sight to be seen with the 89m dyna rig Maltese Falcon, 75m Mirabella V and 58m Kokomo III all on the same starting line at the 2011 St. Barths Bucket with 100% Doyle Sails.

Kokomo III at 2011 St Barths Bucket

During three days of racing, the fleet of 40 superyachts raced around the volcanic island counterclockwise on day one, tackled the infamous “Not So Wiggly Course” on day two, and on day three raced around the island clockwise. The fleet is divided into three categories: Les Elegantes des Mers for the J Class, Les Grandes Dames des Mers for the Cruising Class, and Les Gazelles des Mers for the Racing Class, making the racing more equally competitive and safer. The races are pursuit format, with staggered starts according to each yacht’s rating. The slowest boat is first off the line, and the rest of the fleet starts at time intervals determined by each boat’s predicted elapsed time around the course. Theoretically in a pursuit race, all the yachts will cross the finish line at the same time.

Mirabella V and Kokomo III carried the latest Doyle Stratis sails, while Maltese Falcon carried her 25,791 square feet of Dacron Doyle sails that have taken her over 90,000 miles.

The 96´sloop Symmetry with a full inventory of Doyle Stratis upwind and Doyle downwind sails came in 3rd Overall and 2nd in Les Gazelles.

AXIA at 2011 St Barths BucketAxia

Perhaps the belle of the ball was the 37m AXIA, one of the smallest yachts in Les Grandes Dames, who won her class with her new Doyle Stratis sails.

The Ron Holland designed Blue Too came in 3rd in Les Grand Dames. Blue Too was delivered to its new Owner just six weeks before the Bucket. Blue Too was powered by Doyle Stratis Carbon/Vectran sails and Doyle downwind sails. This was the owner’s first Bucket as an Owner and what an impressive first Bucket it was for him, the Captain and Crew.

Blue Too Celebrating 3rd in Les Grand Dames and the Alloy Cup

In addition to coming in 3rd in class, Blue Too won the Alloy Cup, for best performance by an Alloy Yacht. The four Alloy Yacht competitors included: Kokomo III 58m, Genevieve 38m, Blue Too 34m, and Paraiso 32m.

The 38m P2 won the Perini Navi Cup, awarded to the Perini-Navi Yacht with the best result. Of the 40 yachts competing, the seven Perini-Navi yachts include: Maltese Falcon 88m, Parsifal III 54m, Klosters 47m, Antara 46m, Helios II 45m, and P2 38m.

Maltese Falcon won the Vitter’s Shipyard Seamanship Trophy, awarded to the yacht that demonstrates the best seamanship and sportsmanship in the interest of promoting safety on the race course. This award recognizes the yacht that best demonstrates the understanding that superyachts have serious limitations operating safely in close quarters and value safety well above performance.

In addition to coming in 1st in Les Grand Dames, AXIA also successfully defended the Skullduggery Cravat, holding the trophy for the best Bucket humor for 3 years running. The Skullduggery Cravat is awarded to the yacht and crew who display the best Bucket humor and promulgates non-adult behavior.

To view more photos click here of the 2011 St. Barths Bucket.

What is the World’s Largest Main Made Of?

Doyle Stratis.

If you want the strongest, most reliable sails, choose Doyle Stratis. Mirabella V had her new Doyle Stratis mainsail fitted and trialed in St. Martin yesterday. Mirabella V is the largest sloop in the world: the single-masted vessel is 75-meters long (247 feet), and that mast also happens to be the world’s tallest, with the world’s largest main attached to it.

Mirabella V's New Doyle Stratis Main being lifted on the boat

The scale of Mirabella V’s sails required novel engineering, taking full advantage of Doyle’s extensive superyacht experience, from material development to novel construction techniques.

Mirabella V New Stratis Main
Mirabella V New Stratis Main

Mirabella V’s mainsail measures 1,200 square meters (12,900 square feet). Building and designing Stratis membranes for this sized boat facilitated the need for a new view on the engineering and safety margins. Tyler Doyle modeled the loads using Doyle’s combined CFD-FEA program and designed the structural load paths to best address the enormous loads that this boat will generate. The Stratis main was built in Doyle’s custom built 32,000 square foot superyacht manufacuring facilty in Salem, MA.

Mirabella V Segmented Mainsail

In 2004, when Mirabella was first launched, Doyle invented the “Segmented Mainsail” and “Compression Spring Battens” to allow a sail of Mirabella’s size and complexity to be manufactured, handled and serviced efficiently. With the "Segmented Mainsail" design, the new Stratis mainsail is composed of three separate, yet interdependent, sections. Two full-length battens join the segments at the top and bottom edges to form the complete sail. Building the sail in these segments makes construction, transport and service significantly easier.

Mirabella V Compression Spring BattenThe batten development for Mirabella V was largely a question of optimization: at the required batten stiffness, what is the maximum toughness that could be achieved while minimizing weight aloft? The "Compression Spring Battens" clearly demonstrate Doyle Sailmakers’ commitment to durability and toughness.

Just a year ago Kokomo III was outfitted with 3,038 square meters (32,700 square feet) of Doyle Stratis. Her Gennaker at 2,227 square meters (23,971 square feet) is the largest sail ever constructed. To read more about Kokomo, click here.


Kokomo Sets Sail with 3,038 Square Meters of Doyle Stratis

Kokomo III Sets Sail with 3,038 Square Meters of Doyle Stratis

Kokomo – the 3rd in a series of Dubois designed Superyachts for the same owner – had her sails fitted and trialed on the Auckland Harbor over the last week by Doyle New Zealand. She hosts a complete inventory of Doyle Stratis membranes designed and produced in New Zealand, and easily boasts many records in sail construction and sizing world wide. At 2,227 square meters (23,971 square feet) the Gennaker is thought to be the largest sail ever constructed. The working inventory comprises of a total of 3,038 square meters (32,688 square feet) of Stratis membrane sails, and many innovations in sail handling systems and detailing. The Mainsail has a custom designed boom furling system that utilizes the conventional bolt rope system of the Southern Spars, but also a self loading batten car system jointly designed and tested by Doyle and Southern Spars over the last 18 months, which addresses many of the weak points of boom furling systems with the advantages of full battens in a yacht of this size.

Building and designing Stratis membranes for this sized boat facilitated the need for a new view on the engineering and safety margins along with a new custom built 6,500 square meters Stratis lamination facility in Auckland. Over the period of 12 months Richard Bouzaid and Peter Heppel utilized the fabric structural design program Relax 2 to accurately model potential loads and redesign the previously used structural load paths to better address the enormous loads that this boat will generate. The investment and lessons learned from this new generation of Superyacht places Doyle well and truly at the leading edge of this market and the future of these high performance luxury yachts.

Kokomo III: 3,000 Square Meters of Doyle Stratis

Doyle Sailmakers will be delivering the latest 58.4-meter Kokomo with the largest Stratis sails to date. The new Alloy Yacht designed by Dubois Naval Architects is fitted with the world’s 2nd biggest carbon fiber mast at 75 meters tall. Doyle Sails New Zealand is fitting Kokomo with 3,000 square meters of Stratis sails.

Doyle Sailmakers have become one of the leading manufacturers of superyachts sails with 4 of the 5 finalists in this year’s Superyacht awards sporting Doyle STRATIS™ sails. Doyle Sails head designer Richard Bouzaid explains the process for developing a STRATIS™ sail for a Superyacht, from the sail design and fit to the boat, through the engineering and manufacture of the STRATIS™ membrane at the 21,000 square foot temperature and humidity controlled plant in Auckland New Zealand.

As with any sail, the first stage in the process is the sizing of the sail. This is especially important on large yachts as errors are costly and often require cranes or the like to take sails on and off a yacht. Accurate measurements are required of all the parameters of the boat to ensure that this process is done correctly. Our first stage in the process is to build an accurate 3D model of the yacht within our design software. These models are accurate to millimeters and include all of the relevant detailing that can effect the fit and performance of the sail. The model shown below is the new 58 meter Dubois designed Kokomo.


These models include all details of the sail attachment points, furling units, head swivels, mast detail with halyard positions, spreaders and other potential conflicts with the sail such as communication equipment, genoa cars in potential positions, stanchions etc. This allows us to then fit a sail to the model and know with certainty that the sail will not only fit correctly to the 3 attachment points, namely head, tack and clew, but also where and if the sail will have other stress or chafe points due to fittings on the boat. They can then be suitably reinforced or the geometry altered to avoid this conflict. The accuracy of this type of modeling has been one of the biggest steps forward with sail design software in the last 10 years.

Shape optimization is the next stage in the sail design process. Base sail shape molds are used for certain geometries and applications and then adjusted for the requirements of the actual sail that is being designed, for example a cruising genoa will have more shape in the back to be more effective when the sheet is eased. During this process the sails will be accurately aligned to the actual attachment points so that mastbend and headstay sags can be incorporated into the sail design. Loadpath (custom fiber laid sails) as a sail is engineered to stretch a certain amount, rather than to a % of its ultimate breaking strength. For a high performing sail we would be typically looking for a maximum elongation anywhere in the membrane in the region of 0.15-0.2% and it is important that the elongation (stretch) is as uniform as possible in the membrane in all areas of use. This dictates how much fiber is required in any area of the sail. The graphic shows the stretch through the sail and where the sail has more stretch than the desired amount, shown green.

During this process of establishing the correct fiber alignment and density, different combination of fibers may be used to get the best balance between weight and overall durability. There are various fibers that we use in a STRATIS™ sail depending on the application. Performance cruising boats will typically use Vectran or a combination between Vectran and carbon fiber. Performance racing boats will use twaron (Kevlar), Carbon fiber or a combination of twaron and Carbon fiber.

Once the orientation of the fibers and the density has been finalized the fiber map for the sail will be programmed into the 12m wide x-y plotters that will lay these fibers onto the surface that will become one of the sides of the finished sail. These fibers are all laid under tension to exact paths determined by the earlier studies.

The final process in the membrane manufacture is the application of the top surface.This is also a film sheet, often with a polyester taffeta on the outside, and pre coated with glue. This is finally vacuum bagged to the table and the laminator, which uses infrared heat lamps and 12000KG of downward pressure. The laminator will then make computer controlled passes over the membrane to activate the glue and expel and remaining air in the laminate. The factory has 2 of this style of laminator operating. The membrane is left to cure for several days before being moved to the Doyle New Zealand 30,000 square foot sail loft floor for finishing, or shipping to one of the many Doyle Lofts worldwide for completion.


Doyle Superyacht Bristolian

The Briand designed 120′ sloop Bristolian sails with her new Stratis sails by Doyle.

Matt Bridge Joins Doyle New Zealand as Superyacht Coordinator

Doyle Superyacht Matt Bridge

After serving his 15-year apprenticeship as a Charter Yacht Captain and Yacht Engineer, Matt Bridge has joined Doyle New Zealand to work alongside Quinny Houry in the Doyle Superyacht Division.

Matt’s extensive knowledge of the superyacht industry, his understanding of the processes that need to happen to ensure a satisfied customer, and his ability to get the work done have led him to join the Doyle New Zealand Team.

Matt and Quinny are the key superyacht contacts at Doyle New Zealand. The latest Dubois 52 meter, Red Dragon, was just suited with Stratis GPc Sails from Doyle New Zealand. Working with Peter Wilson, the owner’s representative, and the team at Alloy Yachts, Quinny and the New Zealand Superyacht Team pulled off an impressive delivery of perfect sails for a perfect yacht. Next up are the sails for the Phillippe Briand 120’ Performance Sloop and new working sails in Stratis for the Superyacht Alithia.

Red Dragon

Doyle Superyacht Red DragonDoyle Sailmakers has launched into the new year with one of the largest projects to come from the Stratis manufacturing facility in New Zealand.

The 52m Red Dragon, the latest Dubois Superyacht from Alloy Yachts, had sails fitted and commissioned in January, marking a milestone for Stratis – by far the largest sails produced to date, and by all accounts probably the largest custom inlaid fiber sails produced by anyone in the world.

Since Doyle New Zealand embarked on the Stratis project over five years ago in conjunction with Technology New Zealand, Doyle New Zealand has produced over 2,000 racing and cruising sails. Stratis sails have been exported to almost every country with Doyle Sailmakers locations worldwide purchasing the sails in either completed form or as a blank sail membrane to be finished with their own personal touch.

The total Stratis membranes on board Red Dragon account for over 27,000 square feet of sail area – an impressive feat by anyone’s standards, with the reacher alone coming in at just over 8,500 square feet. New Zealand innovation products are always at the forefront of the marine industry, and the Stratis Membrane Sails from Doyle New Zealand are being selected by a very high percentage of the new and existing Superyachts being produced due to the weight savings, performance increases and benefits of a sail that can be specifically engineered to address the exact load path on each corner of the sail. Every specific fiber sandwiched between the polyester or mylar laminates is engineered from propriety software and then mapped to a fully automated manufacturing process. Various fibers such as vectran, carbon fiber and kevlar are selected dependant on the owner’s requirements.

Super Maxi Maximus also selected exclusively GPx Stratis Membrane sails for their bid to compete in the 2007 Sydney to Hobart race, but unfortunately Maximus had to withdraw prior to the race start with keel problems.

Join the revolution and contact your local Doyle Superyacht Loft to discuss the right Stratis sail for your boat.

Douce France

Doyle Superyacht Douce FranceDouce France, a 42m Catamaran, reputed to be the largest in the world has just completed sea trials supporting a new set of Doyle Stratis GPc sails. The yacht has just completed an extensive refit at New Zealand Yachts in Whangerei and is now continuing on her extensive charter season in the South Pacific.