trimaran hydrofoil

Foiling 101

The F101 takes you through your foiling journey, providing a progression pathway from the beginner foiler to the Olympian. F101 sets new challenges and goals at whatever level you come in, from expert to beginner.

The F101 is an all-new foiling trimaran aimed specifically at those sailors that, for whatever reason, thought foiling was too difficult for them. The concept originates from the experience of teaching many people to foil in the International Moth class and addressing the main barriers they faced. So we set about creating a new boat without the design restrictions of a box rule – in this way, foiling has been made easier.

“The boats are great fun and I was foiling after about 10 minutes on the first day and having extended periods of foiling after day 2. Not having sailed dinghies for the better part of 20 years, I never really expected to foil, so the boats are fulfilling their designed purpose beautifully. ” — Pete Selby

As an F101 owner, you get access to all of this knowledge and experience, plus access to the F101 Tribe.

The F101 Tribe is an exclusive social media channel that only owners can access, share experiences, tips, and events and generally have a fun time with foiling at the heart of the journey. It is like having a 24/7 help desk..someone, somewhere in the World, is normally awake to help!

The ethos of Foiling World and the F101 TRIBE is to:

· Sail a Fun boat

· Sail with great friends

· Sail in great locations

The F101…more than just a boat! We guarantee to get you foiling, wherever you are in the world, as remote as you like. If you buy an F101, you will FOIL! GUARANTEED!

Whatever your chosen medium, whether it’s a phone, email, text or WhatsApp, we will get back to you!

You can find our phone number and email over on the right-hand side of this page. What are you waiting for?

Few companies give you direct access to this amount of experience, not just before purchasing a boat but throughout your foiling journey.

Got a question? Looking to become an F101 Tribe member? We’d love to hear from you! Contact us .

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Hydrofoils for Sailboats

• By By Steven Callahan
• Updated: July 29, 2020

Hydrofoils have been providing dynamic lift since fish sprouted fins. And people have been employing foils ever since they first put paddle to water, and certainly since adding keels and rudders to boats. But the modern, flying America’s Cup boats, kiteboards, Moth dinghies, shorthanded offshore thoroughbreds—these are all ­playing in a new world in which the terms “hydrofoils” or “lifting foils” describe those oriented to raise a hull or hulls from the water. In these racing realms, if you ain’t got foils, you ain’t got nothin’.

Lifting foils that allow these boats to sometimes home in on three times the wind speed might appear to be of little interest to cruising sailors, but with such common cruising features as self-steering and autopilots, self-tailing winches, rope clutches, fin keels and faster hull shapes all having been passed down from the racing scene, one must ask, “What promise, if any, do hydrofoils hold?”

Lifted or partially lifted boat patents extend back to 1869, but workable watercraft took roots along with early flight. Italian Enrico Forlanini began experimenting with foils in 1898. In 1906, his 1-ton 60 hp foiler reached 42.5 mph. Alexander Graham Bell’s HD-4 Hydrodrome flew on Bras d’ Or Lake at 70 mph in 1919. And several sailing foiler patents began appearing in the 1950s. Notably, JG Baker’s 26-foot monohull, Monitor, flew at 30-plus mph in 1955. Baker experimented with a number of foil configurations, and at least built, if not used, the first wing mast. The first offshore foiler was likely David Keiper’s flying trimaran, Williwaw , in which he crisscrossed the Pacific in the 1960s.

By the 1980s, numerous speed-trial and foil-enhanced offshore-racing multihulls showed huge promise, and have since evolved into behemoth trimarans clocking 30 to 40 knots continuously for long periods, not to mention the monohulls in the Vendée Globe (and soon the Ocean Race) that are capable of speeds exceeding 30 knots. But as boat designer Rodger Martin once reminded me, “If you want a new idea, look in an old book.” He was right. The fully foiling monohulls that will compete in the 2021 America’s Cup will bring things back full circle to the foiling monohull Monitor .

Fluid Dynamics Primer

Any foil—a wing, sail, keel, rudder or lifting foil—redirects the flow of fluid (air included), creating high- and low-pressure areas on opposite sides of the appendage, while developing lift perpendicular to the foil’s surface.

Advancements in foiling science is due in part to the hundreds of foil shapes that were tested, with tabulated results, by the National Advisory Committee for Aeronautics, the forerunner of the National Aeronautics and Space Administration. For the better part of a century now, aircraft and boat designers have been able to choose from a spectrum of refined foil sections that produce predictable amounts of lift and drag for known speeds of fluid and angles of attack, or the angle at which the foil passes through the fluid. Sections of efficient faster foils, as seen on jets or as we flatten our sails to go upwind or reach high speeds, have smaller nose radii and are thinner, with the thickest section of the foils farther aft, up to nearly halfway toward the trailing edge.

The most efficient foil sections at slow speeds are fatter, with the maximum thickness farther forward, and with larger nose radii, than faster foils. The angle to fluid flow or angle of attack also is greater. We see these slower foils on wings of prop planes and sails when off the wind or in light conditions.

Most sailors are familiar with traditional foils on boats, the teardrop sections of keels that produce lift to weather, reducing leeway, and of rudders, allowing them to steer. Even a flat plate can be a foil, but these tend to be inefficient. Such a shape is prone to fluid separation from the surface, meaning they stall easily, and they maintain poor lift-to-drag ratios. Even keels and rudders are somewhat lift-­compromised because they are ­symmetrical and have to work with fluid coming from either side, whereas lifting foils are more like aircraft wings or propellers, with asymmetrical sections honed for performance in a more stable, fluid flow.

The point is, any foil can be employed at various angles to the surface to prevent leeway, produce increased stability, or help lift the boat out of the water. But those not required to work with fluid flowing from opposite sides can then be honed to maximize lift and minimize drag. Asymmetrical foils were used on boats like Bruce King’s bilgeboarders, including Hawkeye , back in the 1970s. And, designers, including Olin Stephens, had previously employed trim tabs behind keels to improve keel performance.

Sails, which are heeled airfoils, not only drive the boat forward, but they also produce downforce, actually increasing the dynamic displacement of the boat. To counter this and keep the boat sailing more upright, multihull designer Dick Newick first employed slanted asymmetrical hydrofoils in the outer hulls of his small charter trimaran, Lark , in 1962. A portion of the lift developed by the hydrofoil resisted leeway, while a portion worked to actually lift the leeward hull, keeping the boat more upright and reducing dynamic displacement and drag.

Anyone who has ridden on even a foil-stabilized boat will know how riding at least lightly on the waves, and especially above them, beats smashing through them. When boats lift off, everything gets a lot smoother, drag falls away, and the boat accelerates.

Cruising on Foils

But why would a cruiser want to whip over the sea? Wouldn’t this demand an inordinate amount of attention by the crew? Would lifting foils even be applicable to a boat that must have substantial displacement to carry crew and stores? Aren’t cruising-boat hydrofoils an oxymoron?

Maybe, but I believe our boats’ hulls are likely to sprout fins much as fish have as we orient foils to more efficiently resist leeway, add stability, aid steering, reduce drag, increase comfort, allow for shallower draft, and enhance wider ­variations in hull shapes.

Boats have gotten increasingly wide through the years to advance form stability, improve performance (primarily off the wind), and boost interior volume. But the downside is that fat boats tend to slam more upwind. What if you could reduce dynamic displacement of the boat and lift that hull even partially from the water? The result would be less slamming, especially upwind.

At the same time, what about narrower boats that are known for being more seakindly, especially when closehauled, but lack form stability to carry adequate sail area for powering upwind, and tend to roll badly downwind? Or shallow-draft vessels that are lovely for cruising, but again, tend to suffer from reduced stability? Foils can give that stability back.

Looking ahead, boat ­designers might choose to reduce ballast, making up for it with a foil. In short, lifting foils can reduce boat drag and motion while increasing power and performance.

Pitching also does no favors for speed or crew comfort. Foils can come into play here as well. Foils parallel to the sea’s surface resist motion up and down, and a lifted boat skating above chop also is less prone to hobby-horsing through waves. Multihulls have always been particularly susceptible to pitching for a number of reasons, but watching videos of multihulls sailing to weather show an obvious huge advantage that foilers have compared with nonfoilers. Offshore multihulls now routinely employ T-foils on the rudders to control the fore and aft angles of the boat (attitude), a feature easily adaptable to any vessel.

OK, so what’s the cost? Obviously, the more things sticking through the hull, ­especially if they are retractable, the more it’s going to impact the interior. There would be added weight, complexity and cost. Foils also create noise, and there’s susceptibility to damage from hitting stuff. And let’s not forget compromises with shapes, purposes and things not yet imagined.

As for damage, it’s possible to fold the foils back into the hull. Think swinging center- boards or actual fish fins. Daggerboardlike foils can at least employ shock-absorbing systems similar to the daggerboard arrangements found in many multihulls. This includes weak links that are outside the hull, so if a foil is struck, it frees the foil to fold back or to come off before being destroyed or damaging the hull. Or, foils might hang from the deck rather than penetrating the hull, allowing them to kick up (and to be retrofitted to existing boats). These configurations also relieve the interior of intrusions, and keep the noise more removed from it. I have no doubt that numerous talented designers will be exploring all kinds of options and compromises in coming years, finding ways to make foils both practical and more than worth the compromises.

Sailing more upright, ­shallower draft, speed, ­comfort—what’s not to like? Just what is possible? I have a feeling the cruising community is about to find out.

Steven Callahan is a multihull aficionado, boat designer and the author of Adrift , an account of his 76 days spent in a life raft across the Atlantic.

• More: foils , How To , hydrofoils , print june july 2020 , sailboat design
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Sailing’s Hydrofoiling Revolution

• By Herb McCormick
• January 18, 2023

There’s a revolution underway in the sport of sailing, and it can be summed up in one simple word: foiling.

More specifically, we’re talking about hydrofoils , the winglike appendages mounted beneath the hull of a vessel that, at a certain speed, lift the hull clear of the water. When this happens, the foiling sailboats can reach speeds two or even three times faster than possible in “displacement” mode.

And sailboats are just one element of the foiling revolution: Surfboards, paddleboards and powerboats are also getting in on the act.

An Italian naval architect named Enrico Forlanini is credited with developing the first waterborne hydrofoils, which he affixed to a 60 hp, airscrew-driven craft that topped off at 36.9 knots back in 1906. In the century that followed, a series of would-be inventors took a swing at the concept with varying degrees of success. Foiling sailboats finally ascended into the mainstream during the 2013 America’s Cup, when Oracle Team USA beat Emirates Team New Zealand in a match between foiling 72-foot catamarans (the Cup has been contested in foiling cats ever since).

Surprisingly enough, my first foiling experience happened some three decades ago, aboard something called a Hobie TriFoiler, from the popular manufacturer of Hobie surfboards, beach cats and kayaks. The TriFoiler, basically a 22-foot trimaran with a central pod and a pair of mainsails stepped on the twin outriggers, was invented by a fanatical California engineer named Greg Ketterman. The sail controls were laid out just forward of the tiny airplane-style cockpit; you steered with foot pedals. It was so ridiculously easy that even a gremmie like me had the thing foiling within moments of getting in and reaching off.

But after the initial thrill, it was actually kind of boring. Which, I believe, is why it went out of production soon after. The TriFoiler was, unfortunately, way ahead of its time.

Such was the extent of my personal foiling experience until this past summer, when a new class of foiling monohull skiffs called Persico 69Fs rolled into my home waters for a series of races among youth squads in the class’s inaugural season. I got an invitation to take a spin.

After donning my helmet, wetsuit and life jacket, I was handed the helm with a pair of skilled young sailors on board. At 25 knots, we were towed into Narragansett Bay behind a powerful RIB, foiling all the way. It was terrifying. And a preview of coming attractions.

Once the tow dropped us, the sails went up and we bore off. I skied the tiller extension while scrambling out onto the hiking racks. Which sent us off on a screaming reach. Which flipped the 22-foot-7-inch carbon rocket ship.

Twenty seconds into foiling, and I’d capsized the bloody thing. How embarrassing.

The kids, bless them, were kind and patient. We got the whole shooting match, including ourselves, back upright and tried again. The mainsail trimmer sheeted it home, we started to accelerate, and he said: “Here we go! You’re up. You’re flying!” Indeed, we were.

Hard on the breeze in the 12-knot southwesterly, things unfolded quickly. Spray was flying, and I took more than one solid wave to the kisser. I was mostly too frightened to concentrate on anything but driving, but I did glance at the speedo once: 17.4 knots. (I felt pretty chuffed until later learning a 69F’s top speed is 34 knots. Ugh.)

However, I guess I’d proved the point: With a couple of sailors who know what they’re doing, foiling is for everyone. From now on, just call me Mr. Foiler.

• More: Foils , Hydrofoil Boats , Hydrofoiler , November 2022 , Sailboats , Sailing Yachts , Yachts
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Fresnel Hydrofoil Trimaran – A futuristic solar-powered yacht designed by architect Margot Krasojevic

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Written by Zuzana Bednarova

Architect Margot Krasojevic has beautifully designed the Fresnel Hydrofoil Trimaran – a futuristic yacht that is powered by solar panels on her sails. The design for a solar powered, perpetual motion, hydrofoil Trimaran yacht has been commissioned by Holden Manz wine estate, Cape Town, South Africa .

The Fresnel Trimaran has a folding wingsail for a better lift to drag ratio, the sail’s frame is a built up mechanical structure similar to an airplane wing constructed from carbon fibre with a retractable Kevlar sail covered in aero-nautical film. The sail rotates around the mast and has a series of  motorised creases which catch the wind, the wingsail is actuated by motors that control these movements using solar cells and wind energy.

The combination of the Fresnel lens and holographic film clad outrigger concentrates solar power for more of an efficient output. The form of the main hull acts as one unit with the wingsail, which wraps into the main body of the hull creating a continuous surface resulting in the motorised mast changing the shape of the sail allowing it to harness more wind. The outriggers detach to transform the yacht from racing multihull Trimaran to a cruise boat for leisure. The multi-hulls use recycled carbon fibre materials to reduce the environmental damage caused during processing new carbon fibre sheets.

Fresnel Trimaran yacht from above

The multi-hull wingsail design does not carry a heavy ballast which slows down vessels, all the materials used are strong yet lightweight.

A triangulated woven polyester mesh trampoline with a vinyl coating runs the length of the Trimaran, it is connected to the wingsail which wraps itself into the main composite carbon fibre hull, the trampoline frame acts as a water piercer with a heavy ensuring a smoother ride. Wind flows over wingsail and uplift drives the Trimaran forward.

A solar-powered yacht by Architect Margot Krasojevic

The Wingsail generates wind energy, internal gearing systems convert wind energy to electricity which can be used to part run the motors or contribute to the integrated desalination unit along with the solar cell/ fresnel clad outriggers which run the desalination unit providing up to 4 litres of drinking water per hour.

Flexible solar panels located on the top and bottom of the wingsail surfaces generate electricity using wind and solar energy.

A futuristic solar-powered trimaran yacht by Architect Margot Krasojevic

During bright windless days, wingsails face the sun and only solar energy is generated.

On windy days, wingsails rotate to generate largest combined energy from wind and sun. At night, wingsails generate just wind energy.

The outrigger hulls can detach themselves from the main hull, they are constructed from a double section vacuum bonded PVC surface lined with Fresnel lenses and holographic film to focus the light intensity towards the sandwiched solar cells.  The Fresnel trimaran also has a set of fold-out hydrofoils. When it’s in monohull mode, these hydrofoils can be deployed, pushing the main hull up above the water, reducing water resistance by up to 80 percent, allowing for a fast, smooth ride that uses less fuel.

Fresnel Trimaran yacht by Architect Margot Krasojevic

The main cabin is lined with holographic film which defracts incident light, it also acts as a prismatic concentrator which channels light towards the photovoltaic material.

The second stage to the project involves a series of elliptical tracks running across the yacht’s  boards attempting to harness the main hull pendulum motion to run the perpetual retrieving magnetic turbine motor.

Please contact CharterWorld - the luxury yacht charter specialist - for more on superyacht news item "Fresnel Hydrofoil Trimaran – A futuristic solar-powered yacht designed by architect Margot Krasojevic".

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l’Hydroptère DCNS Hydrofoil Sailboat

l'Hydroptère is a hydrofoil-based experimental trimaran designed by Alain Thébault, a French yachtsman who is also the boat's captain. She officially became the world's fastest sailboat in November 2009, by breaking the outright nautical mile record. Approved by World Speed Record Council (WSRC), she recorded an average speed of 50.17kt over one nautical mile.

Hydrofoil-based trimaran

Construction Started

Maximum average speed, length overall.

l’Hydroptère is a hydrofoil-based experimental trimaran designed by Alain Thébault, a French yachtsman who is also the boat’s captain. She officially became the world’s fastest sailboat in November 2009, by breaking the outright nautical mile record. Approved by World Speed Record Council (WSRC), she recorded an average speed of 50.17kt over one nautical mile.

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The boat’s name ‘l’Hydroptère’ was derived from two Greek words: hydro and pteron, which mean water and wing respectively. In January 2012, DCNS, a French naval defence company and one of Europe’s leading shipbuilders, became the ship’s sponsor and consequently her name was changed to l’Hydroptère DCNS.

In August 2012, the sailboat arrived in San Francisco Bay to participate in America’s Cup World Series race.

History of l’Hydroptère

The conceptualisation of l’Hydroptère dates back to 1975 when late Éric Tabarly (July 1931 – June 1998), a famous French yachtsman and an officer in the French navy, was told about viability of such a project.

In 1983, Alain Thébault took over the project. With Éric Tabarly’s guidance, he was able to build a model of the boat in 1985 and sailed it on the Grand Canal at the Château of Versailles, France. In 1992, Alain was able to get support from DCNS, Aérospatiale, Dassault and the Chantiers de l’Atlantique shipyard. They all decided to become a part of the project.

Construction of the boat commenced in 1993, with DCNS manufacturing the hull. It was completed in 1994 and in her maiden flight, l’Hydroptère was able to achieve a speed of 28kt.

The ship was taken out of action in 1998 after one of her hydrofoils was torn away. The incident occurred when she was trying to break the speed record for 24 hours. She returned to the water two years later after being fitted with a new hydrofoil. She was also armed with a 3D flight simulator.

Design of the experimental trimaran

The l’Hydroptère DCNS project was made possible by combining aeronautical and marine techniques. The three-hulled trimaran can fly five meters above the surface of water. In flight mode, the boat’s contact area with water is reduced to 2.5m 2 .

The boat’s take off is attained by her hydrofoils, which are fitted underneath each of the outrigger hulls. These are angled at 45° in water and give an upward thrust as soon as the boat reaches 10kt speed. The thrust that makes the ship to rise above the surface of water is produced due the difference in pressure between the upper and lower surfaces of the foil. The lift increases with the increase in speed. The ship can reach a speed of 45kt from 20kt in ten seconds.

The ship’s hydrofoils or wings are made of titanium coated carbon fibre to make them stand against powerful stresses. The boat’s optimised shape, which was attained by applying aerodynamic principles, ensures that she gets maximum efficiency from her sails and at the same time keeps the wind-resistance to a minimum.

l’Hydroptère DCNS specifications and speed

Related project, .adastra superyacht, zhuhai, china.

Adastra is a trimaran-type superyacht built by McConaghy Boats for Hong Kong-based shipping baron Anto Marden. The 42.5m (140ft) superyacht has been designed by UK-based John Shuttleworth Yacht Designs.

The overall length of the boat is 22.48m. The beam is 24m and draft (while in water) is 3.5m. The ship’s draft is reduced to 2m while flying. The length of outrigger hulls is 6.7m, while the length of each hydrofoil is 5.7m. The boat’s weight is 7.5t.

The mast is 28m tall. Gennaker area and mainsail area of the sails are respectively 315m 2 and 185m 2 in size.

The trimaran requires about 12kt of stabilised speed to take off. Her speed is approximately two times that of wind; in other words the boat cruises at 30kt with 15kt of established speed. Maximum speed of the boat is 56kt and maximum average speed on one nautical mile is 50.17kt.

Contractors and suppliers involved in the hydrofoil trimaran project

Van Peteghem Lauriot-Prévost (VPLP), a French naval architectural company, and HDS were the main architects of l’Hydroptère DCNS.

The central hull of the boat was manufactured by DCNS Lorient, while floats and crossbeams were built by shipyards Decision and Airbus Nantes respectively. Foils and rudder were built by B & B and Airbus Nantes, and mast by Lorimat. Strain absorbers were provided by Legrand & Revigny.

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[2023] Hydrofoil Yacht: The Ultimate Guide to Sailing on Foils

• November 1, 2023
• Hydrofoil Basics

Quick Answer: A hydrofoil yacht is a sailboat equipped with wing-like foils that lift the hull out of the water as it gains speed. This reduces drag, increases speed, and provides a smoother ride. Hydrofoil yachts can be retrofitted on both monohull and multihull sailboats, with different types of foils used for stability and control.

Welcome to Hydrofoiling™, where we bring you all the latest and greatest information about hydrofoil boarding. In this comprehensive guide, we’ll dive into the world of hydrofoil yachts, exploring their history, configurations, classes, and more. Whether you’re a seasoned sailor or a curious beginner, this article will provide you with expert advice and insights into the exciting world of hydrofoil yachts.

Table of Contents

Quick answer, quick tips and facts, background: the evolution of hydrofoil yachts, types of hydrofoil yachts, hydrofoil classes: from moths to ac75, hydrofoil yacht brands and models, advantages and disadvantages of hydrofoil yachts.

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A hydrofoil yacht is a sailboat equipped with wing-like foils that lift the hull out of the water as it gains speed. This lifting action reduces the wetted area of the hull, minimizing drag and allowing the yacht to achieve higher speeds. Hydrofoil yachts can be retrofitted on both monohull and multihull sailboats, with different types of foils used for stability and control.

Shopping Links: Check out hydrofoil yacht products on Amazon | Shop hydrofoil yacht on Walmart | Etsy hydrofoil yacht products

• Hydrofoil yachts use foils to lift the hull out of the water, reducing drag and increasing speed.
• Different types of foils, such as T foils, C foils, S foils, and L foils, are used for stability and control.
• Hydrofoil yachts can be retrofitted on both monohull and multihull sailboats.
• The International Moth class is one of the most widespread uses of hydrofoils in sailboats.
• Hydrofoil yachts can achieve impressive speeds, with some reaching over 50 knots.

Hydrofoil technology has been around for over a century, with the first patent for a hydrofoil boat filed in 1898 by Italian engineer Enrico Forlanini. Since then, hydrofoil yachts have undergone significant advancements, transforming the sailing experience and pushing the boundaries of speed and performance.

The concept behind hydrofoil yachts is simple yet ingenious. By using wing-like foils mounted under the hull, these yachts can lift themselves out of the water as they gain speed. This lifting action reduces the wetted area of the hull, minimizing drag and allowing the yacht to glide effortlessly through the water.

Hydrofoil yachts come in various configurations, each designed to optimize performance and stability. Let’s explore some of the most common types of hydrofoil yachts:

Monohull Hydrofoil Yachts : Monohull hydrofoil yachts feature a single hull and employ a “ladder” arrangement of hydrofoils. These hydrofoils typically have a dihedral angle of around 50 degrees and are complemented by a stabilizing rudder foil. This configuration provides stability and control, allowing the yacht to sail smoothly on foils.

Multihull Hydrofoil Yachts : Multihull hydrofoil yachts, such as catamarans and trimarans, offer increased stability and performance. These yachts use wider planforms, allowing for greater lift and control. Some multihulls utilize three foils, with two main forward foils providing lift and a horizontal foil on the rudder for additional control.

Hydrofoil Catamarans : Hydrofoil catamarans, also known as foilcats, combine the stability of a catamaran with the speed and efficiency of hydrofoils. These yachts can achieve impressive speeds while maintaining excellent stability, making them popular choices for racing and recreational sailing.

Hydrofoil technology has found its way into various sailing classes, revolutionizing the way we sail. Let’s take a closer look at some of the notable hydrofoil classes:

International Moth : The International Moth class is one of the most widespread uses of hydrofoils in sailboats. These single-handed dinghies feature foiling capabilities, allowing sailors to achieve incredible speeds and maneuverability. The class has seen rapid growth since 2001, with carbon fiber foils and advanced design techniques pushing the boundaries of performance.

Waszp : The Waszp class is similar to the International Moth class but utilizes aluminum foils instead of carbon fiber. This makes the Waszp more accessible to a wider range of sailors while still providing the exhilaration of foiling.

AC75 : The AC75 is a foiling monohull sailboat class used in the 2021 America’s Cup. These impressive yachts can reach speeds of up to 50 knots, showcasing the incredible potential of hydrofoil technology in the world of competitive sailing.

IQFoil : The IQFoil windsurfer class was selected by World Sailing for the 2024 Summer Olympics. These windsurfers feature hydrofoils, allowing athletes to glide above the water and achieve impressive speeds.

IMOCA 60 : Originally designed as non-foiling offshore racers, the IMOCA 60 class has embraced hydrofoil technology. These yachts now feature S-shaped daggerboard foils, providing partial foiling capabilities and enhancing performance in various conditions.

F50 : The F50 sailboat class is used in the SailGP series and is the first sailboat class to break the 50-knot barrier during a race, with a top speed of 52.2 knots. These high-performance catamarans showcase the incredible speed and agility that hydrofoil technology can offer.

Several brands have embraced hydrofoil technology, offering a range of hydrofoil yachts to cater to different sailing preferences. Here are some notable hydrofoil yacht brands and models:

Gunboat : Gunboat is a renowned brand in the world of luxury hydrofoil yachts. Their models, such as the Gunboat 68 and Gunboat 72, combine performance, comfort, and elegance, providing an exceptional sailing experience.

GC32 : The GC32 is a hydrofoil catamaran designed for high-performance racing. This foiling catamaran offers thrilling speeds and precise control, making it a favorite among competitive sailors.

AC72 and AC45f/AC50 : These hydrofoil catamarans were used in the America’s Cup, showcasing the cutting-edge technology and innovation in the world of hydrofoil yachts. These yachts pushed the boundaries of speed and performance, captivating sailing enthusiasts worldwide.

Nacra 17 and Nacra F20 : Nacra is a well-known brand in the world of multihull sailing, and their Nacra 17 and Nacra F20 models feature hydrofoil capabilities. These yachts offer a perfect balance of speed, stability, and maneuverability, making them popular choices for recreational and competitive sailing.

Hydrofoil yachts offer a range of advantages that make them appealing to sailors seeking speed, performance, and an exhilarating sailing experience. However, they also come with some drawbacks. Let’s explore the pros and cons of hydrofoil yachts:

Advantages:

Increased Speed : Hydrofoil yachts can achieve impressive speeds, thanks to reduced drag and increased lift. This allows sailors to cover more distance in less time, making hydrofoil yachts ideal for racing or simply enjoying the thrill of speed on the water.

Smooth Ride : By lifting the hull out of the water, hydrofoil yachts provide a smoother and more comfortable sailing experience. The reduced contact with the water minimizes the impact of waves and chop, resulting in a smoother ride even in rough conditions.

Improved Efficiency : Hydrofoil yachts are more efficient than traditional sailboats, thanks to reduced drag and improved lift. This increased efficiency translates to better performance and reduced energy consumption, making hydrofoil yachts an environmentally friendly choice.

Disadvantages:

Complex Design : Hydrofoil yachts require a more complex design compared to traditional sailboats. The addition of foils and the associated control systems can increase the complexity of the yacht, requiring more maintenance and potentially higher costs.

Learning Curve : Sailing a hydrofoil yacht requires a certain level of skill and experience. The handling and control of a hydrofoil yacht can be more challenging compared to traditional sailboats, requiring sailors to adapt to the unique characteristics of foiling.

Higher Costs : Hydrofoil yachts, especially high-performance models, can come with a higher price tag compared to traditional sailboats. The advanced technology, materials, and design required for hydrofoil yachts contribute to their higher cost.

How fast is the hydrofoil racing yacht?

Hydrofoil racing yachts can achieve impressive speeds, with some models reaching over 50 knots (57.5 mph or 92.6 km/h). The F50 sailboat class, used in the SailGP series, holds the record for the fastest sailboat class, with a top speed of 52.2 knots (60 mph or 97 km/h).

What does a hydrofoil do to a boat?

A hydrofoil lifts the hull of a boat out of the water as it gains speed. This reduces the wetted area of the hull, minimizing drag and allowing the boat to achieve higher speeds. The lifting action of the hydrofoil also provides a smoother ride by reducing the impact of waves and chop.

Read more about “… Hydrofoil Catamaran: The Ultimate Guide to Foiling on Water”

How fast do hydrofoil boats go?

Hydrofoil boats can reach impressive speeds, depending on their design and purpose. Racing hydrofoil yachts can achieve speeds over 50 knots (57.5 mph or 92.6 km/h), while recreational hydrofoil boats can reach speeds of 20-30 knots (23-34.5 mph or 37-55.5 km/h) or more.

Why don’t boats use hydrofoils?

While hydrofoils offer significant advantages in terms of speed and efficiency, they also come with certain limitations. The complex design and higher costs associated with hydrofoils can be prohibitive for some boat owners. Additionally, the handling and control of hydrofoil boats require a certain level of skill and experience, making them less accessible to novice sailors.

Read more about “… Why do boats not use hydrofoils?”

Hydrofoil yachts have revolutionized the sailing experience, offering increased speed, improved efficiency, and a smoother ride. Whether you’re a competitive sailor looking for the thrill of high-speed racing or a recreational sailor seeking a more exhilarating sailing experience, hydrofoil yachts provide an exciting and innovative option.

Recommended Links:

• Hydrofoil History
• Advanced Hydrofoiling Techniques
• Hydrofoil Equipment Reviews
• How Do Hydrofoils Work on Boats? 2023

Reference Links:

• Sailing Hydrofoil – Wikipedia
• Gunboat Official Website
• Nacra Official Website
• SailGP Official Website
• America’s Cup Official Website

Now that you have a comprehensive understanding of hydrofoil yachts, it’s time to set sail and experience the thrill of foiling firsthand. Whether you’re racing on the high seas or cruising along the coast, a hydrofoil yacht will take your sailing adventures to new heights. Happy foiling!

Disclaimer: The information provided in this article is based on research and personal experience. Hydrofoiling™ is not affiliated with any specific brand or product mentioned in this article. Always consult with experts and follow safety guidelines when engaging in hydrofoil activities.

Review Team

The Popular Brands Review Team is a collective of seasoned professionals boasting an extensive and varied portfolio in the field of product evaluation. Composed of experts with specialties across a myriad of industries, the team’s collective experience spans across numerous decades, allowing them a unique depth and breadth of understanding when it comes to reviewing different brands and products.

Leaders in their respective fields, the team's expertise ranges from technology and electronics to fashion, luxury goods, outdoor and sports equipment, and even food and beverages. Their years of dedication and acute understanding of their sectors have given them an uncanny ability to discern the most subtle nuances of product design, functionality, and overall quality.

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Trending now

The Fresnel Hydrofoil Trimaran is a futuristic sailboat

By Adrian Prisca

Updated on August 31, 2017

Penned down by London-based architect Margot Krasojević, the Fresnel Hydrofoil Trimaran looks like a mesmerizing sailboat of the future, with an astonishing shape and a unique electric propulsion system that’s years beyond the diesel/electric hybrid engines used on the most amazing hybrid yachts nowadays.

The Fresnel sailboat could be a waterbone perpetual-motion machine, because it could basically go on forever as long as it’s sunny or windy outside, with zero emissions and no fuel costs. When there’s no wind, three electric motors, one in each hull, will power the boat from the onboard banks of batteries, that are charged through solar and wind power.

With this 100 percent green propulsion system this futuristic sailboat should be able to deliver the same speed and performances as if the boat would run on fuel. The yacht has been designed both with long distance cruising and racing in mind, with a carbon fiber sail that’s more like an aircraft wing than a traditional sail.

This will help this sailing yacht perform really well even in the lightest of breezes and when it’s in trimaran mode, the yacht should be able to reach a top speed of 40 knots. If you want even more speed the vessel could lift up onto hydrofoils that will increase the top speed even further.

In cruising mode the Fresnel sailboat will turn into a monohull and on battery power alone it could cruise at speeds of up to 15 knots. The batteries are charged through lenses, solar panels and holographic film that’s everywhere on the sailboat, even in the interior of the main cabin.

You might think that the Fresnel Hydrofoil Trimaran is years away but the construction of the first high tech sailboat like this one is scheduled to begin this summer, which means we’ll see this beauty on the high seas pretty soon. It should cost around $15 million to build and I’m pretty sure that it will receive a lot of interest when it’s ready!

[RobbReport]

About Adrian Prisca

Founder of Luxatic and countless other projects, Adrian has shaped this website into a go-to source for discerning readers looking for the latest in luxury products and experiences. He has over 15 years of experience in creating, managing and publishing lifestyle content across numerous platforms and he’s considered a leading voice in the luxury industry. Learn more about Luxatic's Editorial Process .

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Fresnel Hydrofoil Trimaran Sailboat

-Fresnel Hydrofoil Trimaran Sailboat, Solar Powered Yacht, Architecture Images

Fresnel Hydrofoil Trimaran Sailboat Design

Solar Powered Yacht for Holden Manz Wine Estate, Cape Town design by Dr Margot Krasojevic architect

14 Nov 2016

Fresnel Hydrofoil Trimaran Sailboat Images

Design: Dr Margot Krasojevic, architect

Location: Cape Town, South Africa

Fresnel Hydrofoil Trimaran Sailboat by Margot Krasojevic

The design for a solar powered, perpetual motion, hydrofoil Trimaran yacht, commissioned by Holden Manz wine estate, Cape Town.

The Fresnel Trimaran Trimaran has a folding wingsail for a better lift to drag ratio, the sail’s frame is a built up mechanical structure similar to an airplane wing constructed from carbon fibre with a retractable Kevlar sail covered in aero-nautical film.

The sail rotates around the mast and has a series of motorised creases which catch the wind, the wingsail is actuated by motors that control these movements using solar cells and wind energy.

The combination of the Fresnel lens and holographic film clad outrigger concentrates solar power for more of an efficient output. The form of the main hull acts as one unit with the wingsail, which wraps into the main body of the hull creating a continuous surface resulting in the motorised mast changing the shape of the sail allowing it to harness more wind.

The outriggers detach to transform the yacht from racing multihull Trimaran to a cruise boat for leisure. The multi-hulls use recycled carbon fibre materials to reduce the environmental damage caused during processing new carbon fibre sheets.

The multi-hull wingsail design does not carry a heavy ballast which slows down vessels, all the materials used are strong yet lightweight.

A triangulated woven polyester mesh trampoline with a vinyl coating runs the length of the Trimaran, it is connected to the wingsail which wraps itself into the main composite carbon fibre hull, the trampoline frame acts as a water piercer with a heavy ensuring a smoother ride. Wind flows over wingsail and uplift drives the Trimaran forward.

The Wingsail generates wind energy, internal gearing systems convert wind energy to electricity which can be used to part run the motors or contribute to the integrated desalination unit along with the solar cell/ fresnel clad outriggers which run the desalination unit providing up to 4 litres of drinking water per hour.

During bright windless days, wingsails face the sun and only solar energy is generated. On windy days, wingsails rotate to generate largest combined energy from wind and sun. At night, wingsails generate just wind energy.

The outrigger hulls can detach themselves from the main hull, they are constructed from a double section vacuum bonded PVC surface lined with Fresnel lenses and holographic film to focus the light intensity towards the sandwiched solar cells.

The Fresnel trimaran also has a set of fold-out hydrofoils. When it’s in monohull mode, these hydrofoils can be deployed, pushing the main hull up above the water, reducing water resistance by up to 80 percent, allowing for a fast, smooth ride that uses less fuel.

The main cabin is lined with holographic film which defracts incident light, it also acts as a prismatic concentrator which channels light towards the photovoltaic material.

The second stage to the project involves a series of elliptical tracks running across the yacht’s boards attempting to harness the main hull pendulum motion to run the perpetual retrieving magnetic turbine motor.

Fresnel Hydrofoil Trimaran Sailboat images / information from Dr Margot Krasojevic Architecture

Dr Margot Krasojevic

Address: Holden Manz Wine Estate, Green Valley Rd, Franschhoek, 7690, South Africa Phone: +27 21 876 2738

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Windrider rave - the future in the past.

FLYING ON WATER

Over twelve years have passed since WindRider had the original concept of bringing foiling to the average sailor.  But it took the exceptional media coverage of America’s Cup races in 2013 for people to fully appreciate the excitement of sailing on hydrofoils.

Our hope is to bring the WR Rave back into production.  Leveraging WindRider’s image of “Sailing Simplified” our goal is consistent with the original one of bringing a foiling sailboat to the average sailor.  There couldn’t be a better time.

Current foiling craft are expensive, complicated and require exceptional agility and skill.  The WindRider RAVE is meant to be affordable, comfortable and relatively easy to handle.  Hence, the trimaran design, cockpit face-forward below the boom seating and foot pedal steering all contribute to stability, comfort and ease of us compared to other foiling sailboats on the market.

We are currently seeking a partner(s) who can financially support bringing the WR RAVE back as WR RAVE II with some modernization in collaboration with experienced boat designers.

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The $15 Million Fresnel Hydrofoil Trimaran Yacht Is Powered by the Sun and Wind

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The Fresnel Hydrofoil Trimaran might look like a sci-fi writer’s fantasy, but it will soon become a reality for its new South African owners. The futuristic sailboat is the brainchild of Dr. Margot Krasojević, a London-based architect whose career has focused on creating eco-friendly projects that shift existing paradigms. Recent projects include a Canadian prison with its own hydroelectric dam, a coastal home in South Africa powered by the tides, and a water-purifying bridge in Amsterdam.

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The Fresnel (named after a prism lens used to concentrate light in lighthouses) uses a 100 percent green propulsion system that is years beyond the diesel/electric hybrid engines used on some yachts. The sailboat uses solar and wind power to charge the onboard banks of batteries. “We’re aiming for the same speed as if the boat runs on fuel,” says Krasojević. In other words, the owners will gain the same performance without any compromises, not to mention zero emissions and no fuel costs.

Krasojević has essentially created a waterborne perpetual-motion machine. Working with U.K. hydrokinetic engineers and veteran yachtsmen, Krasojević designed a sailing yacht for both long-distance cruising and racing. The carbon-fiber sail—modeled on the fixed-wing sails of recent America’s Cup racing yachts—is more like an aircraft wing than a traditional sail, allowing it to perform well in the lightest of breezes.

When there is no wind, three electric motors (one in each hull) run on the boat’s batteries. Fresnel lenses, solar panels, and holographic film intensify sunlight and channel it to the batteries. “Even the interior of the main cabin is covered with holographic film, which acts as a prismatic concentrator that channels light towards the photovoltaic materials,” says Krasojević. Translation: Every available space is used to charge the batteries.

Beyond long-distance cruising, the owners plan to use the yacht for racing. In trimaran mode, the yacht can reach 40 knots. When the owners want even more speed, the vessel lifts up onto hydrofoils. “This will increase the top speed considerably,” says Krasojević.

In cruising mode, the Fresnel yacht converts to a monohull. On battery power alone, it can cruise at 15 knots. The construction of the high-tech Fresnel Hydrofoil Trimaran is scheduled to begin this summer. It will incorporate the latest lightweight composites throughout the hull. The 115-foot yacht, which should cost nearly $15 million to build, is a one-off project for Krasojević.

But the one-of-a-kind sailboat promises to push yacht design forward. “The goal of this yacht is to use renewable energy every way possible without compromising the design,” Krasojević says. ( margot-krasojevic.squarespace.com )

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New weta trimaran boat review by jonathan weston.

May 01st, 2018

Weta Marine, manufacturer of the successful Weta Trimaran, provided me with the opportunity to try out their new and improved Weta Trimaran. The event? 2018 US Multihull Championships at Fort Walton Yacht Club, FL. 

For the racer, several questions needed answering: Was the savings in weight from the new foam core hull construction a regatta changer? How about gains with the new sails? What about one design integrity? Would older sails, and older boats, be able to compete with the new? We would soon find out. 

For the recreational sailor, advantages to the new boats were obvious. They are lighter, thus easier to maneuver on the land dolly. The stronger construction means longer lasting boats. Plus, they now came in a plethora of colors and color combinations. 

After winning Nationals at the heavy air Columbia River Gorge, Roger had brought me here as a reward and tester of the new boats. However, this was a light to moderate air venue, and I had told Roger I was retired. Perhaps it was Roger’s plan, to have the big guy tank (my nickname is Donuts); the one design integrity would be clearly stamped by my poor results. 

Mike Krantz, a previous Weta National Champion, was there to prove the boats fast just in case, and Randy Smyth, another two-time Weta National and Olympic Silver medalist (2), would prove that old boats could compete just as well as the new ones. My expectations were low, but I couldn’t resist trying out the new and improved lighter Weta. Besides, getting together with old friends at one of my favorite sailing venues, FWYC, I couldn’t lose. 

First Impressions

The initial sight of these new boats as we pulled into Fort Walton Yacht Club was a real eye opener. Sitting there in the warm, Florida sun were eight new boats, as smart looking and pretty as a new Ferrari. Also looking pretty were the fellows unloading them: Roger Kitchen, Weta co-designer from New Zealand, and Richard Hitchcock, Weta Florida Ambassador. 

The “New Weta,” or as I call it, Weta version 3.0, now comes in a plethora of colors, some with white decks for wicked style and racetrack points. Krantz would get an aqua/white combo, I would get cadmium yellow, and Dave Berntsen white. But the best-looking boat was candy apple red with white deck, the fleet Ferrari. Sweet as! (I believe this is a Kiwi saying) Spot on! (That works). 

What was different about this new Weta? Was it stiffer? Lighter? We had no scales to verify, and I wasn’t about to hammer on the hulls. Racing or not, new boats are nice to look at on land or water. The new Wetas look like salt water taffy, or glazed donuts coming hot down the conveyor belt, depending on your hunger level. I was hungry to sail one. 

Was the new Weta easier to launch, move around on land? Yes. But uphill, both ways, in the sand? It’s all about the dolly wheels on this one. The new boats ship with a bit bigger wheels than the old, so even on my own, I could wrangle it with ease. 

My SF Bay Area bros, legend “Davo” Dave Berntsen and newbie David Bacci arrived early to knock rust and taste new Weta. With conditions pina colada perfect for Weta sailing, 15-18 knots, the new boats felt lively. The chop was nothing like what we typically plow, yet the boat seemed stiffer. They just felt great stock right out of the box. Was it my imagination or was the boat quieter? I’m 60, so it might be a loss of hearing, but it certainly seems like the foam core dampens the chop inducing vibration. 

Trunkin Nailed It!

The biggest difference I noticed was in the daggerboard trunk. Previous versions of the Weta have had variances in the width of the trunk and blades. If it’s not a snug fit, you needed to make it one, which took a lot of work. I’ve discovered through my boat and borrowing lots of Wetas, that the two key factors in upwind speed at least, are how new are your sails, and how tight your trunk. Loose daggers get outpointed to weather. Too tight, and it’s a struggle to raise and lower the board. But with the new boats? Goldylocks. The board raises up and down with ease – no restraining shock cord necessary – and seems to be a tight fit. 

This improvement came at a price to the manufacturer, as they couldn’t just buy a small lot of the secret sauce that pads the board snugly. Roger, when asked what exactly this stuff was made of, replied, “a German windshield material,” though I think he means side window padding. Kiwis have different names for everything, just so you don’t confuse them with Aussies (who actually build the boats at XSP in some place called Batman, Indonesia). 

Sails, the X Factor

Before the new boats were launched, the sails were modified just before the World Master Games in NZ by North Sails. Wow, these sails were something to look at. Talk about laminar flow. Gone were the odd wrinkles and leech flutter of the old sails. 

Historically, for recreational sailors, the older Gaastra mylar sails have held their shape for many years. It’s only the punishing racer’s complaints that prompted a change. Roger states that, “Up until recently the sails were pattern cut. The new blue trimmed digital cut sails are using a slightly lighter North manufactured Mylar fabric. We have changed the fabric panel orientation slightly to give more support maintaining the sail shape. The new sail was the result of averaging out 6 sails selected from Gaastra and Norths over the last 10 years to maintain OD.” 

There is even a newer “fathead” or squaretop version of the main being manufactured, which could become class legal in 2019. “The bigger main is easier to control in high winds as well,” claims Bob Hodges, new US Weta Class President. 

There were some modifications made to the boats that included 2:1 jibsheets, fixed bridle traveler, and outboard kite placement speed rings. I was reluctant to use any for the regatta, but will probably do so going forward. All three make the boat easier to sail, so it’s not all about the racing on these improvements. That said, I’ve lived a happy Weta life six years without them. 

In the championship regatta, I did feel fast, even for a donut in light to moderate winds, and would attribute it more to the sails than the weight of the boat, though weight does matter. Even trimming the boat down twenty pounds will not make a difference if you gain thirty over the Winter and head for the wrong start line! The sails trimmed right provided the power to roll the heavy donuts forward. I made enough mistakes to fill a season of sailing, and still finished fourth. So yes, fast boat, really fast sails. I felt the power. 

The Weta has extended the life of many sailors who still want the thrill of multihull sailing without the constant pitch poling (though others have, I’ve never flipped it). It’s easy to raise the mast, and the boom – there is no boom to go boom. For those high on the concussion count, it’s something to seriously consider. High school sailor Cam Farrah proved that it’s also a fun, thrilling boat to sail for youngsters. We hope to see more of the tadpoles out there in the future. 

In Conclusion

My take on the deal is that you can have an old boat (boat #18 was in the fleet and still competitive) but you have to keep your sails fresh, and the new sails are indeed better. Bob Hodges proved that with the heavier Weta 2.0 version (seamless amas), and new North Sails, you were still fast. Randy, he’s an Olympic pro sailor, and these were his home waters. He can win with bed sheets on a garbage can. But duly noted by all, after day 1 and getting rolled by top guys including the donut downwind, he changed his kite to a newer one. 

The previous version Gaastra sails have a slightly fuller cut and leech, so they are still competitive in up to 15, but the new Norths are imho far and away faster in breeze. I faired well even in the light air races at 250 pounds, when I kept them in clear air, pointed in the right direction. It’s one of those odd requirements for racing success. 

I was not alone in my assessment. On our Yahoo Group, Berntsen posted: “The new boats are true one design with same layout as all other Wetas. The major improvements in the new boats is build quality;

- blades are very clean and good foils

- foam core construction make boats lighter but all within Weta one design spec

- improvements on trampoline reinforcement

- The best improvement is the new North Sails (Grey with blue trim).  Much stronger material, better sail shape and fast.  If anyone wants to make an upgrade to their older boat - get a new set of sails!  You'll know what I mean when you see/try them.” 

The results amongst the seven new boats chartered or purchased for this regatta were mixed across the board. As you can see, old guys in old boats did just as well as young kids in old boats and old kids in new boats. 

Final Results (Top 10 of 34; 10 races, 1 discard) 1. 437, Randy Smyth[WETA SINGLE], 2-3-3-3-1-4-1-[5]-2-1- ; 20 2. 1193, Mike Krantz[WETA SINGLE], 1-2-1-4-[20]-1-7-2-1-2- ; 21 3. 1003, Robert Hodges[WETA SINGLE], 3-4-2-5-4-[14]-2-4-3-10- ; 37 4. 1190, Jonathan Weston[WETA SINGLE], 7-5-4-2-2-[10]-9-3-5-4- ; 41 5. 254, Keith Rice[WETA SINGLE], 5-6-7-6-3-2-6-[8]-6-3- ; 44 6. 1199, David Berntsen[WETA SINGLE], 10-1-5-1-12-21-[23]-1-4-9- ; 64 7. 622, Carey Jones[WETA SINGLE], 4-[15]-10-12-13-7-3-9-10-7- ; 75 8. 362, Richard Stephens[WETA SINGLE], 8-12-6-10-[18]-3-8-14-14-6- ; 81 9. 1197, David Bacci[WETA SINGLE], 9-10-8-7-24-13-[26]-11-7-5- ; 94 10. 007, Cam Farrah[WETA SINGLE], 14-19-[20]-16-7-11.5/TIE-4-10-8-8- ; 97.5

Yellow: New Boats. Blue: Weta 2.0, New North Sails

In the doubled-up division (crew on board), the Taylor’s won on a new boat. Stephanie Taylor says, “I absolutely LOVE our new custom color Weta! As the Kiwi’s say, “Sweet As”. The new daggerboard fits the trunk like a glove. It looks like a Weta, it sails like a Weta. Let’s keep growing the class!” 

We did not get a chance to put the boat through high wind paces, as racing was canceled for the final big breeze showdown (due to a silly tornado – sheet in, hike harder!) I will honestly have a hard time racing again with the old sails in big breeze. It’s not that big of an investment, and once I get my piggy full, I’ll sport that new boat as well, for the smooth operating dagger trunk alone (okay, it’s the colors, which I believe cost little piggy extra). And for the recreational sailor? As the age old saying goes, “It’s better to look good than to be good.”

By Jonathan Weston

Weta Trimarans

We’d love to hear from you. Send us your stories and photos.

This Futuristic $13 Million Yacht Can Be Powered By The Wind Or The Sun

Super-luxurious megayachts are great, but they're not exactly self-sustaining. That's what makes architect Margot Krasojevic's new yacht concept such a revolution.

The trimaran combines self-harvested energy, a mast made out of carbon fiber, hydrofoils, and an out-of-this-world futuristic design to create one of the most innovative, eco-concious, and eye-catching yachts ever.

For starters, the boat's huge mast is motorized, allowing its sail to catch as much wind as possible at the best possible angle.  It wraps around to form a part of the center hull as well.

The retractable wing-like sail attached to the mast is made from Kevlar, a high-strength synthetic fiber.  And it doesn't just catch the wind — it catches the sun as well.

Tiny solar cells cover the sail, allowing it to soak up the sun's rays and convert it to energy used to power the yacht.

Though the sail is quite large, it probably wouldn't collect enough of the sun's energy on its own to power the ship in the event of no wind.

To aid in the collection of the sun's rays, the ship's two hulls feature super-reflective Fresnel lenses and holographic film to reflect as many of the rays as possible to the huge sail. Additionally, if there is no wind blowing at all, the entire sail can fold upward, directly toward the sun, to soak up as much sunshine as possible.

Combining all that power from those two sources, the Krasojevic says the boat can operate almost completely self-sufficiently.

Krasojevic isn't stopping there with the boat's eco initiatives. She told the Daily Mail that she is looking into designing a way for the boat to also use kinetic energy derived from the ship's movement.

The three-hulled trimaran style of the ship can transition into a monohull mode, ideal for cruising. When in this mode, a set of hydrofoils (similar to an airplane's airfoils) can lift the boat above the water, reducing water resistance by up to 80% and allowing the boat to be much more efficient with the energy it harvests. 

Krasojevic aims to start construction on the yacht in April of this year. 

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“iFLY15 is the unique combination of high performance with easy accessibility – for maximum performance and maximum fun.”

Cec catamarans -ifly15 team, “we love speed while keeping control – high speed needs to be controllable. the flying boat of the future, is a stable foiling sport catamaran.”, cec catamarans – ifly15 team, „ foiling: one of the things you have to experience to really feel it. “, jimmy spithill, skipper oracle team usa, “stable flight is the key to high performance sailing”, “ifly15 – get the balance right between a nice sporting challenge and a reasonable and controllable level – enjoy the exhilaration, the speed and the adrenaline in your veins, but always stay master of the situation “, “stable flight attitude is the most important prerequisite for high performance sailing.”, victor diaz de leon, sailgp team usa, “stable flight attitude is key for easy foiling. ifly15 with superior flight stability delivers immediate flying fun within the first minutes. advantage through high-tech.”, “the ifly15 is the quickest boat around the course, … “, arno terra – sailor, ifly 15 one design and ifly razzor pro, the  performance  foiling  catamaran, for maximum speed and maximum control.

• Easy access to a high HIGH PERFORMANCE FOILING CATAMARAN
• Automated DYNAMIC FLIGHT Assistance SYSTEM – FLYSAFE® FOIL CONTROL
• highest quality standards – High-tech full carbon sailboat
• completely modular – fully customizable
• adjustable rake – MAIN FOIL DIFFERENTIAL during sailing for even more performance in the version IFLY Razzor Pro
• Foiling Versatility and Speed …

The quality and performance have been proven for 8 years and further developed to maximum perfection in every detail

IFLY HYDROFOIL SAILING – EXCELLENCE, FIELD PROVEN TO PERFECTION

Racing     and     more   …..

⦿ Have a high performance racing machine on regattas

⦿ single handed or double Foiling

⦿ crew weight up to 180 kg

⦿ Racing and fun:

⦿ Sail with Family & friends

in any sailing condition:

⦿ Full foiling – upwind and downwind

⦿ Waves and Flat waters

⦿ Light and strong winds

⦿ early take off

⦿ Foiling maneuvers

Transport and Facilities

⦿ Easily transportable on a road trailer

⦿ Slipped with a conventional beach trolley

⦿ ready to sail in 20 minutes

⦿ iFLY15 is designed to sail on the sea and lakes

Stay tuned for foiling events and specials!

Flysafe® Flight assistance

Main foil differential technology – mdt, innovative, sophisticated foil control for unbeaten performance, high speeds and easy access, ifly15 and ifly razzor pro, ifly main foil differential – mdt, ifly razzor pro.

early take off in lightest breeze

F oiling maneuvers are heavily supported, superior flight attitude through active foil control, dynamic control of f light high , pitch and role, non-linear control and feedback control system for best flight stability, even in waves, the foils do not need to be manually manipulated, optimized performance: advanced sailors can adjust rake and gearing, more about flysafe®>>>, active flight assistance, the foil can be trimmed actively while sailing, the key to maximum performance , mdt for performance-orientated pro sailor, mdt extends the flysafe® foil control, to sail large xxl rigs, more about main foil differential ->>>, performance downwind: staying on the foils, full foiling, in 5-6kts tws, reaching max. boat speeds of up to 2.5*tws, performance upwind: full foiling from 8kts. tws, taking off from 7kts tws, video youtube channel, ifly15 foiling catamaran.

The most innovative development in foiling technology

About ifly15, stable flight  is  key for both: first for highest performance and foiling in a wide wind range, including rough and wavy conditions, but also easy access into foiling…...

iFLY stands for uniqueness in design and function. Its superior Flysafe ® active foil control system autonomously supports the stable horizontal flight position in the longitudinal and lateral direction. The 4 T-Foils do not have to be operated by the sailor during sailing.

Average skilled dinghy or catamaran sailors with some trapeze experience can safely foil with the iFLY15 after only a few hours. Quick access – the immediate sensation of success – steep learning curve. In the hand of an experienced sailor, iFLY15 offers a whole new sailing experience with previously not experienced speeds and agile maneuverability.

The flight control system, combined with numerous fine-tuned innovations , ensures safe foiling even in strong winds and rough seas.. Stable flight attitude allows pushing hard, so in good conditions, iFLY reaches high boat speed beyond 30 knots in a controllable way.

IFLY15 offers freedom to fly alone or in pairs. Due to the exclusive use of high-tech materials , iFLY15 is extremely rigid and weighs less than 90 kilos ready to sail. With its low weight and its state-of-the-art hydrofoils, it is airborne in winds as low as 2Bft. / 6 Knots.

iFLY15 has a length of only 15 feet, is easy to transport, quick to get ready to sail, and can be easily slipped from the beach using a conventional beach trolley.

Its sophisticated design reflects the highest demands on quality and function.

iFLY15 – customer reviews

 « LESS CRASHING IS MORE FUN »

MARCUS LYNCH, PROFESSIONAL SAILOR AND OLYMPIC COACH, GC32 OMAN, NACRA17

« I WAS INITIALLY AMAZED AT HOW EASY TO HANDLE THE IFLY IS AND AT HOW IDLE THE BOAT IS EVEN IN STRONG WINDS. »

ANTOINE, IFLY OWNER FROM GENEVA

VERY STABLE, EXTRAORDINARY STABLE. IT IS EXTREMELY INTERESTING, BECAUSE YOU IMMEDIATELY SEE THE ACCESSIBILITY OF THE BOAT.

FRANÇOIS GABART

« GREAT BOAT, LIKE A MOTH ON STEROIDS ! »

VICTOR DIAZ DE LEON, MIAMI, PROFESSIONAL SAILOR. US TEAM SAILGP, INTERNATIONAL MOTH, MATCHRACING MELGES 32, J70

WHAT A GREAT BOAT THIS IS, AND I ABSOLUTELY LOVE IT”

PHILIP WALKER

« THE DYNAMIC FLIGHT CONTROL SYSTEM ALLOWS LONG AND STABLE FLIGHTS »

GERHARD FLORIN, IFLY OWNER FROM GENEVA, SWITZERLAND

TO FELLOW SAILORS WHO LOVE THE THRILL OF SAILING WITH SPEED WHILE MAINTAINING CONTROL”

ROY BALLENTINE

« WELL BALANCED AND RAKE DIFFERENTIAL ALLOWING FOR GREAT PERFORMANCE UPWIND! »

CARLOS ROBLES,PROFESSIONAL SAILOR 49ER, PALMA DE MALLORCA

« A SENSATIONAL FOILING EXPERIENCE. THE SPEED IS IMPRESSIVE »

INGMAR WARNICKE: COMMODORE OF YCSO, YACHT CLUB SCHARBEUTZ, BALTIC SEA

⭐ ⭐   ⭐   ⭐   ⭐

IFLY RAZZOR PRO – THE NEW IFLY FOR EXPERIENCED SAILORS

THE SINCE 7 YEARS PROVEN IFLY15 WITH FLYSAFE® DYNMAMIC FOIL CONTROL has now a pur Racing fellow: THE iFLY RAZZOR Pro. THE iFLY racing VERSION ENABLES EVEN HIGHER PERFORMANCE, to sail in extremely tough conditions and allows sailing with XXL rigs. THE MAIN DIFFERENCE BETWEEN THE IFLY15 ONE DESIGN AND THE IFLY RAZZOR PRO IS A BIGGER RACING RIG, SPECIAL FOILS AND THE MAIN FOIL DIFFERENTIAL (MDT), WHICH IS MANUALLY TRIMMED BY THE SAILOR. THE MDT IS WORKING HAND IN HAND WITH THE FLYSAFE® DYNAMIC FOIL CONTROL SYSTEM.

flying – sailing – Blog

“We’re taking off! Foiling is THE Watersports Trend! – „Boot International 2024“ in Düsseldorf / Germany once again showcases: Foiling is THE trend in watersports.

Performance Sailing – Sail GP News: Racing on the Edge – T-Foil proves to be the winning design

Regatta and foiling News: Long distance Race – Duc d’Albe 2023 – Club Multicoques Hyères – sailing Race @iFLY Razzor Pro

iFLY Main Foil Differential Technology – MDT Foil Control – high Performance sailing

IFLY FOILING Adventure

FOILING – REGATTA – EVENTS

Long distance Race – Duc d’Albe 2021 – Club Multicoques Hyères – sailing Race @iFLY Razzor Pro

INTERNATIONAL IFLY foiling FLEET RACE 2021

iFLY15 successfully crossing the English channel / world record Attempt Cowes to Dinard / Saint Malo

Catamaran europe central, the iflysail team, is looking forward to your message.

EAGLE 4.6 POWER TRIMARAN

- Efficient -Fast - Safe - Stable-

The Eagle 4.6 metre power trimaran is a practical and efficient powerboat that can be propelled at good speeds using a small outboard motor. The economical construction method, easily driven hulls, and the ability to be powered by small outboards make this a cost effective powerboat.

Widely spaced amas (outrigger hulls) make the Eagle extremely stable, and 10 individual watertight compartments make it nearly unsinkable. High stability makes the Eagle great for all forms of fishing, and the low amas make it easy to climb aboard after swimming or snorkeling. 

The slender, deep vee main hull cuts through chop easily, gives a much smoother ride than most monohull powerboats and requires less power to propel. With an 8hp outboard motor and outboard mounted hydrofoil, the Eagle has a maximum speed of around 15 knots, but is happiest and most efficient when cruising at around 10 - 11 knots. The Eagle is most suitable for outboard motors form 5hp - 15hp but can be used with smaller motors. In Initial testing the Eagle achieved over 9 knots with only 3.3hp*.

The Eagle is designed to work best with an outboard motor fitted with a hydrofoil. We recommend the SST-B Series Hydrofoil.

Stitch and tape plywood construction is simple and cost effective and the Eagle can be built by anyone with good DIY skills, although prior experience working with stitch and tape is recommended for this boat. 

*Test with 3.3hp outboard motor performed in calm conditions with one person aboard. 

SPECIFICATIONS

Length Overall: 5m (16ft)

Main Hull Beam Overall: 0.89m (2.9ft)

Main Hull Overall Length: 4.6m (15ft)

Beam Overall: 2.1m (6.9ft)

Max Persons: 3 Persons

Weight (Not including motor) : 100kg Approx

Eagle 4.6 Power Trimaran METRIC plans

MOD 70 hydrofoils

Ultra-modern, lighter = better, craftsmanship, mod70 hydrofoils - design.

We produce the Mod70 hydrofoils for the trimarans in this fast, offshore sailing class. Teams Argo Racing and Beau Geste Racing already sail with uptip L-foils designed by Martin Fischer. In cooperation with Andrew MacPherson (Macca) two sets of foils have already been developed and shipped.

We build your new foiling boat!

Material & technology.

Basic material: the foils are made of carbon pre-preg. The Mod70 hydrofoil models are milled from the 3D-file and Autoclave-resistant carbon tooling is made. With our unique ‘one-shot’ production process, we manufacture all our continuous fiber foils under vacuum cured in our Autoclave.

The production method specially developed for this purpose creates a hydrofoil that cures in one go, without glue joints and including internal stiffening ribs. The result is a super-strong hydrofoil that is as light as possible.

The pre-cutting process of laminates is done by our automated pre-preg cutting machine of the brand Zünd . This process ensures excellent product quality and constant product weight.

For the Mod70 hydrofoils, the board up and down facilities in the foils are also fitted.

CHARACTERISTICS MOD70 HYDROFOILS

Length: 3.40 m Foil-tip-length: 1.35 m Width: 0.56 m

The above specifications refer to the daggerboard foils.

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