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Posts Tagged ‘Tyler Doyle’

Doyle Sailmakers Delivers Sails to 60m Perini Navi Sloop Perseus^3

Perseus^3

After over two years of design, engineering and construction, Doyle Sailmakers has fit sails on the impressive new Perini Navi Sloop, Perseus^3 in La Spezia, Italy this past week.  The sail inventory, produced in Salem, Massachusetts, is one of the largest and most complex ever assembled, and will provide a breathtaking and unprecedented racing and sailing experience for the owners and crew. Perseus^3 stands apart from her peers with both her carbon clearcoat mast – one of the world’s tallest – and for her A2 Spinnaker – the world’s largest sail – measuring in at 28,010 square feet (2,602 square meters).

Two years’ worth of work came together in two days in Italy, as the Mainsail, Reacher and Blade Jib were fitted for the first time.  The yacht will now begin her series of sea trials and sail system trials, gradually adding in the remainder of this spectacular racing inventory.

From the onset, performance was the clear goal of this project. Doyle Sailmakers was involved with the process from the beginning, working with Ron Holland Design, Perini Navi and Future Fibres to optimize every aspect of the sailing experience.   The mast was carefully engineered to assist with the massive sail area of the yacht.  From Doyle Sailmaker’s end, the size of the sails entailed a novel approach to both engineering the materials and sail handling.  Taking it one step further, Doyle CFD (Computational Fluid Dynamics) addressed the challenges of properly balancing the load on the three headstays, with the additional Code 0 Torque Rope, while still maintaining an acceptable headstay sag for the racing requirements of the yacht.  Working with the engineers at Perini Navi, Future Fibers and Germanisher-Lloyd, Doyle CFD helped establish the proper balance and stability of loads on the stays and the sails.

Doyle CFD Analysis

Doyle Sailmakers has long been known for its innovation and this project is no exception.  With prior experience coming from M5, Athos and Kokomo III, Doyle Sailmakers constantly adds new innovations and continues to enhance the overall sailing experience.  New developments for this project include  an inboard end fitting for the battens that isolates both the forward compression of the battens as well as eliminating vertical shifting.  This new design ensures that the custom Perini Navi slides will enter the track without compromising the luff tape – essential to reliable sailing with rollboom mainsails.  Additionally, the working jib, hoisted on a removable inner forestay, necessitates innovative soft hanks that automatically change in diameter as the sail is lowered to allow the sail flake over the larger diameter torque tube at the base of the torque rope.

Perseus^3 is the first vessel from Perini Navi to include a bow sprit – enabling the yacht to carry a number of massive downwind racing sails.  The two spinnakers are among the largest sails ever made. The A2 measures in at 28,010 square feet (2602 square meters) and utilizes over 3,200 yards of cloth.  Initially, there was no existing fabric capable of delivering high performance, light weight and a ‘soft hand’ for handling.  The solution was an extensively tested fabric that blends Polyester with Dyneema – giving the cloth high strength as well as tear resistance.

The Code 0 will also fly off the sprit, and is being furled on the largest Top Down Furling Cable ever created by Future Fibres.  After previous success with Top Down Furling for Code 0’s – with the cable in a contained luff sleeve – this was selected for Perseus^3 to enable the crew to quickly furl the sail and stow it easily.  The Code 0 has been constructed  using Doyle Sailmaker’s proprietary Stratis process, with curved radial seams to follow the path of the loads and enable precise shaping, high strength and minimal weight.

Perini LogoPerini Navi Group, a leader in the design and construction of many of the world’s largest sailing and motor yachts, has long been one of Doyle Sailmaker’s most important partners in the superyacht market.

“We first worked with Perini Navi on Andromeda le Dea in 1990, which at the time was one of the most technologically sophisticated yachts afloat.  We have been pleased to work with them since on some of their highest performing and noticeable projects – from the majestic 88m Maltese Falcon, the racing oriented 38m Sloop P2, or the signature purple sails of the 50m Ketch Baracuda,”  said Robbie Doyle, CEO of Doyle Sailmakers. ”We always enjoy working with Perini Navi as they share our passion for sailing and innovation, and are always working to deliver the very finest product to their customers.”  In just this last year, Doyle Sailmakers has been fortunate enough to deliver sails to the 56m Ketch Audace, 52m Ketch Tamsen, 50m Ketch …Is A Rose, 50m Ketch Silencio, 45m Sloop Clan VIII, 40m Sloop State of Grace and currently has sails underway for the 56m Ketch Asahi and 45m Sloop Helios.

Main and BoomThe mast and boom for Perseus^3 were produced by Future Fibers, and at  75.8m the mast stands among the three tallest rigs ever built in the world.  “We have managed to produce a tube with a perfect exterior surface and a flawless Clearcote gloss Carbon finish with zero filler – which can add up to 3 per cent to the weight of a mast,” according to Future Fibres.   The mast weight is optimized at 16.4 tonnes.  Similarly, the 23.4m carbon fiber furling boom has been manufactured using pre-preg carbon improving structural performance and weight, compared with standard wet–laminate construction. The boom features a new mandrel furling and locking system, as a result of extensive testing and prototyping.

In order to ensure safe sailing, Perseus^3 will feature an exclusive Rig Load Monitoring System that monitors the loads acting on the sails and rig components through a series of strain gauges.

For the handling and control of the impressive sailing system, Perseus^3 features the new generation of Perini Navi captive winches and furlers. The jib winches pull a maximum load of 30 tonnes and have a maximum line speed of 40 meters per minute. Electric variable speed motors and furlers, duly synchronized and monitored by the Perini Navi Automated Sail Handling System, dramatically improve furling and deploy times while speeding the tacking and jibing time by over 75% compared to vessels of the previous generation.

Sail Inventory:

Main Sail: 808 m2 The mast features 4 main sail locks: 1 full hoist + 3 reefs Batten car system Cunningham ram
Reacher: 1,160 m2
Blade Jib: 706 m2 with carbon vertical battens
Working Jib: 370 m2 On soft hanks and removable torque cable
Code 0: 1,804 m2 On the biggest torque cable TDF ever built by Future Fibres
A2: 2,602 m2
A3: 2,173 m2
Spinnaker Staysail: 721 m2

Technical Features:Future Fibres
Mast: 75.8m Carbon Fibre by Future Fibres
Boom: 23.4m Carbon Fibre by Future Fibres
Standing rigging: Lateral Rigging in Carbon Fibre Aft and Fore Stays in Carbon+PBO+Kevlar

 

 

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

How Does the Design of the Maltese Falcon Sails Relate to Winning Star Sails?


The process is complex, but the results simple: Stronger, Faster Sails.

Integrating High Performance Parallel Computing (HPC) with state-of-the art Computational Fluid Dynamics (CFD) and Structural Mechanics (FEA) software from industry leader ANSYS Doyle Sailmakers has recently begun utilizing a high resolution, fully coupled computational simulation environment designed specifically to answer real world sailing challenges.

The complex turbulent flow around sails, rigs, and hulls is calculated to solve for millions of data points in the flow surrounding the sails. The detailed stress distribution and deformation that results in the sails and rigs from the forces imposed by the flow is then calculated using a Structural Solver with a composites pre-processor to accurately model the complex overlapping fiber and panel layouts in modern sails.

As Jud Smith says: “I love the flow graphics, I don’t understand the process, but the results in improved sail performance are undeniable.”

Flow Visualization From Star CFD Upwind Simulation (AWA=22, AWS=15 kts)

To learn more about Doyle Star sails, click here.

To learn how the DOYLE Engineering Department optimized the sail shape for a boat 88 meters in overall length, with a mast height of 53 meters off the water and maximum yard length of 22 meters, read Tyler Doyle, DOYLE’s head engineer, coauthored paper, Optimization of Yard Sectional Shape and Configuration for a Modern Clipper Ship.

How Does the Design of the Maltese Falcon Sails Relate to Winning Star Sails?


The process is complex, but the results simple: Stronger, Faster Sails.

Integrating High Performance Parallel Computing (HPC) with state-of-the art Computational Fluid Dynamics (CFD) and Structural Mechanics (FEA) software from industry leader ANSYS Doyle Sailmakers has recently begun utilizing a high resolution, fully coupled computational simulation environment designed specifically to answer real world sailing challenges.

The complex turbulent flow around sails, rigs, and hulls is calculated to solve for millions of data points in the flow surrounding the sails. The detailed stress distribution and deformation that results in the sails and rigs from the forces imposed by the flow is then calculated using a Structural Solver with a composites pre-processor to accurately model the complex overlapping fiber and panel layouts in modern sails.

As Jud Smith says: “I love the flow graphics, I don’t understand the process, but the results in improved sail performance are undeniable.”

Flow Visualization From Star CFD Upwind Simulation (AWA=22, AWS=15 kts)

To learn more about Doyle Star sails, click here.

To learn how the DOYLE Engineering Department optimized the sail shape for a boat 88 meters in overall length, with a mast height of 53 meters off the water and maximum yard length of 22 meters, read Tyler Doyle, DOYLE’s head engineer, coauthored paper, Optimization of Yard Sectional Shape and Configuration for a Modern Clipper Ship.

Doyle Engineers Sails for Maltese Falcon

Maltese Falcon

On June 7th, 2006 Maltese Falcon successfully completed her first sail trial. At 289 feet long, a displacement of 1,240 tons, and draft of 19.7 feet, the Ken Freivokh-designed Maltese Falcon is the largest private sailing yacht in the world. With her three 191-foot tall rotating masts and 25,791 square feet of sail area, the Maltese Falcon is a truly revolutionary yacht built by Perini Navi. Based on the DynaRig square rig concept, developed with Gerry Dijkstra & Partners of Holland, each mast carries five separate push button-controlled, internally furled square sails engineered by DOYLE Sailmakers.

To view more photos from the sail trials of the Maltese Falcon,click here.

“The Maltese Falcon has written a new page in the history of yachting, the DynaRig is no longer an experimental concept” is Tom Perkins’, the owner, first comment to this stunning success. “Everything worked as engineered and the yacht achieved some remarkable numbers: hard on wind in 15.8 knots true, at 38 degrees relative wind angle. we sailed with no fuss or strain at 10.5 knots. On a close reach at 60 degrees relative angle, the speed (still at knots 16 true wind) climbed to 14 knots. The balance is, essentially, perfect–with weather helm never exceeding 0.6 degrees on the wind, or 2.5 degrees on a fast reach. The angle of heel was around 15 degrees, but in a puff, once touched 20 degrees. The leeway angle was well under 5 degrees (without the dagger-board in place). Since it was our first day out, and we wanted to be careful, these results were achieved with the topgallants and the royals furled–so we expect even better numbers in further tests. The maximum loading on the masts never exceeded 50% of our (very, very conservative) limit, so we have plenty of room for some even better results.

“There were no untoward effects from the revolutionary rig. The automatic tacking worked smoothly in all wind strengths–tacking takes only 1.5 minutes, and curiously, she tacks quite readily in light winds, perhaps even easier than in heavier air, (because the wind force against the rigs, when backed, increases with the square of the wind velocity). Jibing is almost trivial and, to a passenger, virtually undetectable.”

To learn how the DOYLE Engineering Department optimized the sail shape for a boat 88 meters in overall length, with a mast height of 53 meters off the water and maximum yard length of 22 meters, read Tyler Doyle, DOYLE’s head engineer, coauthored paper, Optimization of Yard Sectional Shape and Configuration for a Modern Clipper Ship.

For more information on the Maltese Falcon, visit www.symaltesefalcon.com.

MALTESE FALCON LINKS
YouTube – The Greatest Sailboat Ever – Maltese Falcon
YouTube – The Boaters TV 2 – Sailing Yacht The Maltese Falcon
YouTube – Superyacht Cup Antigua 2006
Superyacht Sets Sail – CNET July 14, 2006
Sailing Yacht ‘Maltese Falcon’ – Luxury Perini Navy Yacht Charter
Perini Navi “Maltese Falcon”
UK Company Engineer Rig for $100 Million Superyacht
Venture Capitalist Tom Perkins ’53 Launches a Superyacht – and a Novel
More photos of the Maltese Falcon