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Posts Tagged ‘Kokomo III’

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.

Doyle Sailmakers Sponsors 2011 St. Barths Bucket

St. Barths Bucket 2011

Doyle Sailmakers is proud to sponsor the 2011 St Barths Bucket and celebrate the 25th anniversary of the Bucket Regattas. Doyle Sailmakers extends its congratulations to the Bucket organizers and to the superyacht owners and crew for the growth of the Bucket Regattas and of superyacht racing in general.

Numerous superyachts with Doyle sails will be taking part in the 2011 St Barths Bucket including: Axia, Blue Too, Drumbeg, Helios, Hetairos, Kokomo III, Maltese Falcon, Mirabella V, Moonbird, P2, Paraiso, Song of the Sea, Symmetry and White Wings.

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.

Picture2_1.jpg

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.