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The foil assist.

• Ultimate Performance
• Patented Morrelli & Melvin Hull / Foil System
• Bespoke-built, Epoxy-Infused Hulls

The New Paradigm

• High Quality
• Unmatched Performance & Efficiency
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Why Foilcat?

The FoilCat Team is relentlessly dedicated in our pursuit of the ultimate user experience accentuated by the highest performance and safety standards throughout the marine industry.

A RIDE LIKE NO OTHER

The foil greatly improves ride quality and efficiency.  Reduction in operator and passenger injury and fatigue.

CUSTOMIZABLE

Built to suit from collars to cabin tops and the engines on the back. We work with you to create your dream watercraft.

IMPROVED RANGE

A greater range on same volume of fuel vs any other platform. Our models are 40-50% MORE fuel efficient than our market competitors.

F1x A-class foiling catamaran

World champion, lighter = better, craftsmanship, meet the foiling f1x a-class catamaran.

This is the ultimate singlehanded foiling catamaran of the moment: ultramodern, incredibly fast, very agile, extremely strong and feather-light, in an aerodynamic and ergonomic design. The perfect total package, packed in 1 foiling catamaran. This is the world’s coolest boat for singlehanded races and the winner of several A-cat world championships and many other sailing races.

The 2020-F1x A-cat is exactly the same foiling catamaran that made Mischa Heemskerk Vice-World Champion at the Herveybay Worlds 2018 in Australia and World Champion at Weymouth 2019. All our foiling F1x A-class catamarans come straight, ready to race and ‘Mischa-tuned’ from our factory.

Unique design enables top performances

The F1x A-class foiling catamaran is the ultimate reflection of our current design language. The aerodynamic design accentuates the performance qualities of this super fast foiling racing boat. The sophisticated deck plan provides clear control and minimal air resistance.

Foils The rudders and daggerboard foils used on the F1x A-class foiling catamarans are produced with the highest quality carbon pre-preg fibers. The foils are cured in our own Autoclave . Our winning foil design was created in close cooperation with Glenn Ashby and the designers of AC Team New Zealand .

Construction The F1x A-cat is manufactured entirely according to the carbon pre-preg/ Nomex production method, and cured in our Autoclave. This technology is the same as used in the aerospace industry and within other foiling boats like for example, the America’s Cup.

Design The design of the F1x foiling A-class catamaran was completely conceived by the DNA design team and made at DNA’s own yard. In the DNA design team Pieterjan Dwarshuis, Mischa Heemskerk and the renowned Dutch industrial design engineer Rudo Enserink worked closely together to create the perfect foiling A-class catamaran.

We build your new foiling boat!

Technical details.

The F1x A-class foiling catamaran has a number of unique features that improve performance. For example:

• Semi ridged trampoline. Gives extra torsional stiffness to the boat and increases its aerodynamic characteristics.
• Patented main-sheet-wheel-system. For more direct and faster trim of the main sail.
• Aerodynamically placed traveller car.
• Flexible daggerboard casings. For minimal water absorption in floating mode.
• Aerodynamically shaped ‘beams’.
• Adjustable T-rudders. Foiling with rudder differential is possible.

Specifications

LOA: 5.49 m BOA: 2.30 m Max. draught: 1.20 m Sail area: 13.94 m Total weight: ca. 53 kg Top speed: 31 kn Extra: All measurements according to IACA Class regulations.

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Professional BoatBuilder Magazine

The efficiency of a foiling powercat.

By Dieter Loibner , Mar 13, 2020

Matanzas Watercraft’s founder, Jan Brandt, in his office with a rendering on the wall and the prototype of the Matanzas 29 foiling powercat peeking through the shop door.

Motivated by his own boating experience and America’s Cup foiling technology, a startup builder launches the Matanzas 29, a new breed of powercat for fishing and cruising.

Wherever Jan Brandt goes, a constant companion since his childhood days in Hamburg, Germany, is his passion for watersports. Competitive swimming, surfing, waterskiing, fishing, scuba diving, sailing, you name it, he’s done it—and still does. No surprise, then, that Brandt is also deeply involved with boats, not just using them but also designing and building them. His latest project is a 29 ‘ (8.8m) foil-assisted planing cruising power catamaran designed for twin outboards from 60 hp to 90 hp. Last fall, construction was far advanced as Brandt prepped for finishing, outfitting, and getting the boat ready for sea trials off St. Augustine, Florida, where he set up shop as Matanzas Watercraft LLC.

Inspired by the Sliver 29, a catamaran designed for fishing and weekending, built by SuperCat in South Africa , Brandt defined specifications that suited his own use patterns and his home port in St. Augustine. “I am looking to build a day-use cat for fishing offshore waters but also capable enough to make the run to Bimini and Abacos on a calm summer morning,” his design brief reads. Also on the list: sufficient load capacity for three to four people for day use and provisions for a couple to cruise for a few days; a range of 200 nm on one tank; and a cruising speed of 20 to 25 knots. Brandt: “I need to deal with a 2–3 ‘ [0.6m–0.9m] chop and Atlantic Ocean swells. While an open cockpit with center console and hardtop is totally sufficient, a head and dry storage for gear with maybe just enough space for a bunk for two would be awesome.” Since crab or lobster pot buoys are not much of a concern in Florida, Brandt explored the idea of foil assist to reduce power requirements and improve seakeeping. However, he was adamant about the ability to safely beach the cat and limit overall beam to 9.1 ‘ (3m) to keep the trailering permits manageable.

The Matanzas 29 plywood/carbon prototype has wave-piercing bows with a positive rake and peaked decks that shed water quickly. The bows’ fine entry flattens out toward the stern to encourage planing, even when operating without foils.

He did some preliminary design work himself, but when the project got serious he consulted with Bieker Boats of Anacortes, Washington. Principal Paul Bieker served as the lead designer of the Oracle America ’s Cup sailing team and was instrumental in developing the outrageously fast 72 ‘ (22m) foiling catamarans that ushered in a foiling revolution following the 2013 Cup on San Francisco Bay. Bieker now applies variations of the foiling concept to pleasure craft, most recently with an innovative 53 ‘ (16m) sailing catamaran intended for racing and weekend cruising (see “ Fledging the Eagle ,” Professional BoatBuilder No. 182) and now with Brandt’s foiling powercat.

The basic idea behind foiling is maximizing efficiency while curbing the need for big engines, a notion that has yet to find footing with production boatbuilders. Brandt: “I’m not interested in boats over 25 ‘ [7.6 m] running 250- or 300-hp twin motors. I’ve been doodling around for a year on the idea, spent more time on the hullform, and when I decided to pull the trigger on building one, that’s when I contacted Paul to help me finalize the design, incorporate some of the design criteria and requirements, and make it work from an engineering perspective. He helped crystallize the hull shape and get the details fleshed out.”

Foiling Tech Trickle-Down

A former racing sailor who campaigned a Mini 650, Brandt met Bieker in 2010 while cruising the waters of Puget Sound. He ran his own environmental consulting firm in Seattle and also took up boatbuilding. First came stitch-and-glue kayaks, but soon he graduated to the PT Skiff, an 18′ (5.5m) kit boat by Port Townsend Watercraft designed by Bieker and Russell Brown. With Brown’s encouragement Brandt designed and built the cedar-strip carbon composite Syhoya , a handsome 21 ‘ (6.4m) weekend cruiser powered by a 60-hp Evinrude E-Tec outboard for cruising Puget Sound and beyond.

Previously, Brandt designed and built Syhoya, a 21’ (6.4m) weekender with a 60-hp outboard for cruising the  coastal waters of the Pacific Northwest.

In Brandt’s painstakingly clean and organized workshop a 10-minute drive from his house in St. Augustine Beach, Bieker’s plans laid out on the workbench and the prototype of the Matanzas 29 under construction showed how personal predilection, boating experience, and exposure to innovative design ideas informed his choices. For a simple boat that aims to maximize efficiency and minimize power requirements, the design process was complicated. Some salient features, like the combination of planing hulls with wave-piercing bows and the foil arrangement most commonly associated with fast sailing cats, seem a bit counterintuitive at first, but Brandt explained the underlying thinking.

He wanted to minimize the fatigue of the acceleration/deceleration forces when running the steep chop of St. Augustine Inlet during an outgoing tide, “letting the bows do the work,” rather than endure slamming, Brandt explained. “That’s when we combined the wave-piercing hulls with the foil assist in order to get away from larger engines while still being able to carry the displacement we need, all the things we added that were part of my criteria—the fish boxes and the scuba gear. All that weighs quite a bit, [but we wanted] to manage that with reasonably small motors. That’s how we got to wave-piercing bows and the foils.” Load-carrying capacity, especially at speed, is another reason he decided against displacement hulls.

Passengers can ride on the main deck, under the hardtop, or on the “rumble seat” forward.

Why plywood/composite instead of carbon-reinforced plastic construction, which would have further minimized weight? Brandt reasoned it was less complex and costly for a prototype that has to establish proof of concept and test the nascent market for foiling powerboats. Tooling up for a production run is his goal. The thin plywood—okoume 6mm/1⁄4 “ for the topsides, 9mm/0.35 “ for the bottom—is sheathed in E-glass, a laminate schedule of 200-g (5.9-oz) and 300-g (8.95-oz) layers inside and out. Turn Point Design in Port Town­s­end cut the kit, based on design files it received from Bieker Boats. “That worked perfectly. We have had zero issues with the wood fit,” Brandt recalled. “Every puzzle joint fit the first time.” For the foam-core portions of the boat, he used 20mm (0.79 “ ) Divinycell H80 sandwiched between multiple layers of regular-modulus carbon woven roving of 5.9 oz 0°/90°, and 2×2 twill weave of the same weight, which conforms well to complex 3D shapes. For taping and to reinforce high-load areas, Brandt applied 400 g/m2 (11.8 oz/sq yd) of 45° double biaxial carbon and 9 oz/sq yd (305 g/m2) unidirectionals.

The entire wet deck, measuring 18 ‘ x 10 ‘ (5.49m x 3.05m), was vacuum-bagged with the foam core and three layers of carbon fiber on each side, laid up in various directions. That’s a large piece to build in a compact workspace, so he tackled it first and then stored it against the wall to make room for hull construction. Florida’s warm, humid climate imposes its own demands on working with resins, which ideally are catalyzed and processed in an ambient temperature around 65°F (17°C). Brandt planned to get the big parts done during the cooler time of year, turning on the air-conditioning if necessary and starting at 3 a.m. Doing “the large areas of the hull, we had three layers of glass on the bottom, so running that over 30′ [9.14m] in one shot, even just hand layup, gets challenging, because the initial pot cures before you have the last layer on.” That’s a herculean task for one, but he had help from his wife, Tonya, and then hired some neighborhood kids to do some sanding.

This angle shows the square sterns, the cutouts for the fuel hoses and steering lines, the carbon-reinforced main deck, and the storage boxes.

In addition to all this new construction, Brandt still found opportunities to include some repurposed parts from his Mini 650, which he had raced from Newport to Bermuda and in West Coast regattas. In his stash of spare kit was an extra boom—a 3.7m (11.15 ‘ ) raw carbon tube from CST Composites that always traveled with the boat. It became the beam that holds the anchor roller and forms the front terminus of the foredeck, Brandt noted, adding that he cut and fit sections of carbon spinnaker poles to support the cat’s hardtop.

Outboards with Mustache Foils

As originally conceived, the boat was to be powered by twin 60-hp Suzuki DF 60A three-cylinder outboards. However, working with technicians at Suzuki Marine of North America , which rents shop space from him next door, Brandt opted for the four-cylinder DF 90A, which he considered a better fit for the prototype’s offshore work and for testing the custom mustache foils. Granted, the DF 90A packs 50% more power and a third more weight than a DF 60A, but it’s still modest compared to twin 300s often seen on boats of similar size.

Custom-designed carbon mustache foils on the cavitation plate will boost stern lift as their attitude is adjusted by the tilt and trim mechanisms of the outboards.

“I don’t need 55 knots; 25 is awesome. That’s fast cruising,” he declared. “Every now and then…it’s nice to be in the 30s to run home, but that’s plenty.” If it sounds extreme, Bieker wanted even less. “I think he was initially uncomfortable with the speeds I wanted, until we had a discussion about what the market expects,” Brandt laughed. “The mentality is ‘I gotta be able to go 30, gotta be able to outrun a thunderstorm. I’ve got 40 or 50 miles to the Gulf Stream, and I want to get there in reasonable time.’ Paul’s sweet spot is 15, 16 knots, because you can do that with a lot less power. To go from 16 to 22 knots is a big jump, but 16 knots is not where the market is; it’s not where the utility of the boat is. So I had to push the area of power where he was less comfortable and the threshold of where he did not want to be associated with. That was a big compromise. I credit him for coming my way.”

Outward-facing J-foils forward carry most of the displacement when deployed. Their angle of attack is manually adjustable by ±2° with a sliding bolt, and hinge pins allow the foils to fold up when not in use.

The production of the mustache foils (named after their shape) was outsourced to Chris Maas on Center Island, Washington, a former builder of custom rowing shells and International Sailing Canoes. He said he was using his 3-axis CNC router to machine molds from MDF board and construct the foils in wet layup with Pro-Set epoxy. These foils will be mounted to the cavitation plate, so any adjustment in the angle of attack comes from the outboards’ tilt and trim mechanisms. The main appendages amidships are outward-facing J-foils (similar to those on the 31 ‘ /9.45m Foiler by Enata Marine; see PBB No. 173, pages 39–40). A hinge pin at their heads allows them to fold up when not in use, while the angle of attack is adjusted manually when the boat is stopped, by slacking two bolts and sliding the hinge mechanism fore and aft for a range of ±2°.

“We lofted all the layers carefully,” Bieker said of the foil construction that was performed by Simon Miles, a carbon fiber fabricator in Port Townsend. “We came to 167 layers,” Bieker continued. “Typically we get to within 1mm of the target shape. The structural spar is solid, and toward the trailing edge there’s some hi-temp PVC foam core.” It will be done in five to six cooks at 250°F/121°C (see the sidebar below).

In foiling mode the cat will not be in “full flight” with hulls clear of the water but rather skimming along the surface. As simple and sensibly powered as the boat is, Brandt still wants the capacity to carry a payload of approximately 1,600 lbs (725 kg) for fuel (2 x 35 gal/132.5 l), water (14 gal/53 l) food, paddle, and surfboards, fishing, and scuba gear, a porta-potti, some electronics, and a small refrigerator. To cover his energy needs for starting and house loads, he’ll go with 2 x 75-Ah lead-acid batteries with 650-amp cold-cranking capacity. Two 100-watt solar panels on the hardtop and intermittent charging from the alternators when motoring should keep the lights on and the beer cold.

Deck, stern, and side views reveal the arrangement of the boat with foils deployed and folded up. Note the mustache foils mounted to the cavitation plates of the outboards to increase lift and help trim the boat.

Brandt named his company Matanzas Watercraft after the river that runs past St. Augustine, where he attended high school after emigrating from Germany with his family in the 1980s. Dating back to those days, he knows the surf spots, gnarly riptides, and choppy patches where sea breeze and ebb collide. After dialing in the new boat during sea trials, which include a trip to the Bahamas to test it as a cruising, fishing, and diving platform, he hopes this America ’s Cup–inspired concept will generate the interest that warrants a limited production run. Ideal customers, Brandt reckoned, are sailors who share his passion for water sports, value his high-tech approach to efficiency, and “don’t necessarily need the power that generally is the norm in the market.” It’s a bold bet but one that seems right for the times. “The intent is there, and we have the facilities to do it,” he added.

Dieter Loibner is editor-at-large of Professional BoatBuilder.

Cooking the Foils

While Jan Brandt of Mantanzas Watercraft was putting the finishing touches on his Matanzas 29  powercat in St. Augustine, Florida, the foils were being made at the diagonally opposite corner of the lower 48, in Port Townsend, Washington, roughly 2,500 miles (4,023 km) distant. Working inside his barn workshop that used to house a boatbuilding shop called Seven Seas, carbon fiber technician Simon Miles, 31, stood next to the carbon tool he’d built for the job. He was warming swatches of prepreg with a heat gun to help them stick to the adhesive film he had previously put on top of the cured substrate of the first cook.

Simon Miles heats the prepreg to bond it to an adhesive film he put down onto cured substrate in the foil mold.

Having worked for Oracle’s America ’s Cup team and Mad Fiber, a Seattle company that made high-end carbon racing wheels, Miles is very much at home with high-end carbon work, but this job was new territory, because it required high-temperature tooling, and he was using a new source for the intermediate-modulus prepreg required.

The tooling was built from a plug of machined medium-density fiberboard (MDF). The monolithic carbon mold is infused with Pro-Set High-Temp infusion resin using Sigmatex 660 g/m2 (19.5 oz/sq ft) of 2 x 2 twill, a ply of 200-g/m2 (5.9-oz/sq-ft) woven carbon, and two coats of Pro-Set High-Temp tooling putty against the machine-tool-face end to limit print-through of the heavy woven cloth.

Infusion of the carbon tool.

The centerpiece of the foil project is a 20 ‘ -long (6.1m) shipping container the previous owner converted into a giant oven for constructing high-end carbon fiber parts. “It has Roxul insulation and stainless walls inside,” Miles explained, “and there is a huge heater/blower unit from Electroheat.” For this project, Miles moved the container/oven into his workshop and hooked it up to three-phase power.

To help lower the cost, Miles sourced 108 yd of 190-g/m2 (5.6-oz/sq-ft) unidirectional 250 prepreg from Composite Recycling Technology Center (CRTC) in Port Angeles, Washington. The material was rejected for use in aerospace applications, hence the substantial savings. At CRTC it was stored at 0°F (–17.8°C), which is common for prepreg. Once out of the freezer it must be processed quickly, but the cool ambient temperatures of the Pacific Northwest winter (at or below 50°F/10°C) allowed Miles enough time to complete the work.

Some complexities: The foils, designed by Bieker Boats, comprise 167 layers of carbon laminate, 144 of them unidirectional 0°, the rest off-axis plies (±45°). In the lower part of the foil, the structure will include foam core (Divinycell H100 foam) and Gurit SE 84 laminates. Miles said he planned to switch to the lower-temperature prepreg so the foam does not “blow up.” At 250°F (121°C) H100 distorts, changing density and dimensions, but SE 84 cures below that threshold at a cooler 176°F (80°C). Miles said he would still precook the Divinycell to reduce the chances of expansion after the foam had been shaped. To finish, he will use woven cloth for wrapping, and SE 84 as well. Lastly, the B-side will be faired and sanded.

Miles estimated total construction time would run eight weeks for a springtime delivery.

Dieter Loibner

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How Do Hydrofoil Catamarans Work? (The Science Behind It Explained)

Have you ever wondered what it would be like to fly on the water? Hydrofoil catamarans are designed to do just that, and many people are amazed by the experience of gliding across the water at speeds that are unheard of with traditional boats.

But what are hydrofoil catamarans, and how do they work? In this article, well explain the science behind these revolutionary boats and explore the advantages, design considerations, and safety precautions that come with them.

Well also look at some examples of hydrofoil catamarans to show you just how powerful and advanced they are.

So, if youve ever wanted to know how these boats work and what sets them apart, read on!

Table of Contents

Short Answer

Hydrofoil catamarans work by using foil-shaped wings that protrude from the bottom of the boat, below the water line.

The foils are designed to lift the vessel out of the water, reducing the surface area touching the water, and therefore reducing drag.

As the boat moves forward, the airflow on the foils generate lift, causing the boat to rise out of the water and glide along the surface.

The foils act as an air cushion, allowing the boat to travel at higher speeds than a regular catamaran.

What are Hydrofoil Catamarans?

Hydrofoil catamarans are a type of boat that use hydrofoils to lift the hull above the water.

This reduces drag, allowing for faster and smoother sailing than traditional boats.

Hydrofoils are wings that protrude from the hull of the boat and are designed to lift the boat out of the water.

This reduces the amount of water resistance and allows the boat to travel faster.

The hydrofoils are adjustable, allowing the boat to be tuned to the desired speed.

Hydrofoil catamarans offer an efficient and fast way to travel on the water, making them a popular choice for recreational and competitive sailing.

The hydrofoils work by creating lift as the boat moves through the water.

As the boat moves, the water flow pushes against the hydrofoils and creates a pressure differential.

This pressure differential creates lift, which lifts the boat out of the water and reduces drag.

The hydrofoils also reduce the amount of wave resistance, allowing the boat to glide through the water.

The hydrofoils can be adjusted to match the speed of the vessel, allowing the boat to be optimized for maximum performance.

The angle of attack of the hydrofoils is also adjustable, allowing the boat to be tuned to the desired speed.

The fins are designed to keep the boat stable and can be adjusted to match the speed of the vessel.

In conclusion, hydrofoil catamarans are a type of boat that uses hydrofoils to lift the hull above the water.

How Do Hydrofoils Work?

Hydrofoils are a type of boat that uses a set of wings or fins to lift the hull above the water.

The hydrofoils are attached to the hull and use the water pressure to propel the boat forward.

The wings of the hydrofoils are designed to reduce the amount of wave resistance, allowing the boat to glide through the water with greater efficiency.

The wings are usually made of lightweight materials such as carbon fiber or aluminum and are designed to produce lift when the boat is moving at a certain speed.

The wings can be adjusted to different angles, which can increase or decrease the lift.

When the boat is moving, the hydrofoils create a low-pressure zone underneath the boat.

This low-pressure zone reduces the amount of drag and improves the efficiency of the boat, allowing it to move faster and more smoothly.

The hydrofoils also help to reduce the amount of wave resistance, allowing the boat to glide through the water with less effort.

They are suitable for all kinds of sailing, from racing to cruising.

Hydrofoils can be adjusted to match the speed of the vessel, making them an excellent choice for those who want to sail faster.

Hydrofoils are also a great choice for those who want to reduce their environmental impact.

Hydrofoils reduce drag, which means that they require less fuel to move the boat, resulting in lower emissions.

Hydrofoils are a great way to reduce the environmental impact of sailing while simultaneously enjoying a faster and smoother ride.

Advantages of Hydrofoil Catamarans

Hydrofoil catamarans offer a unique and efficient way to travel on the water.

The hydrofoil design reduces drag, allowing the boat to glide through the water with greater speed and stability than traditional boats.

The hydrofoils are attached to the hull and use the water pressure to propel the boat forward, creating less wave resistance than a traditional boat.

This allows the boat to move faster and smoother, while using less fuel.

Additionally, the fins can be adjusted to match the speed of the vessel, making it easier to control.

The design of the hydrofoil catamaran also allows it to ride high above the water, reducing drag and contact with the water surface.

This allows for a smoother ride, allowing the boat to move faster with less fuel consumption, and less noise and vibration.

Additionally, the hull shape of the hydrofoil catamaran is designed to increase its stability and maneuverability, further reducing drag and allowing for a faster and smoother ride.

The combination of the reduced drag, increased stability, and smoother ride makes hydrofoil catamarans a popular choice for recreational and competitive sailing.

The ability to move quickly and efficiently makes them ideal for racing, and the increased stability and maneuverability makes them well-suited for recreational activities such as sightseeing or fishing.

Additionally, the reduced contact with the water surface can help to protect the hull from damage, making the boat more durable and longer-lasting.

Overall, hydrofoil catamarans offer an efficient and fast way to travel on the water, making them a popular choice for recreational and competitive sailing.

The combination of reduced drag, increased stability, and smoother ride makes them an ideal choice for anyone looking to get the most out of their time on the water.

Factors Affecting Hydrofoil Performance

The performance of a hydrofoil catamaran depends on a variety of factors, including the type of hydrofoil, the size and shape of the hull, and the speed and direction of the wind.

The hydrofoil itself is an important factor in determining the performance of a hydrofoil catamaran.

Different types of hydrofoils offer different levels of lift, drag, and stability, so its important to choose the right hydrofoil for the job.

The size and shape of the hull also affects the performance of the hydrofoil catamaran, as the hull is the part of the boat that provides the buoyancy and helps the boat to stay afloat.

The speed and direction of the wind also affects the performance of a hydrofoil catamaran, as a headwind or tailwind can cause the boat to be pushed or pulled in a certain direction.

Finally, the weight of the vessel also affects the performance of a hydrofoil catamaran, as a heavier boat will require more lift from the hydrofoil to remain afloat.

Design Considerations for Hydrofoil Catamarans

Hydrofoil catamarans are a special type of boat that use a unique design to offer efficient and fast travel on the water.

The key component of the design is the hydrofoil, which is a fin-like structure attached to the hull that uses the water pressure to push it forward.

This reduces drag and wave resistance, resulting in a smoother, faster sailing experience than traditional boats.

When designing a hydrofoil catamaran, there are a few important considerations that engineers must take into account.

The hydrofoils must be designed so that they can be adjusted to match the speed of the vessel, as well as provide stability and reduce wave resistance.

Additionally, they must be constructed from durable materials to ensure they can stand up to the elements and provide a reliable ride.

The shape of the hull also plays an important role in the performance of a hydrofoil catamaran.

A rounded hull is ideal for reducing drag, while a flat hull is better suited for stability.

As for the size of the hydrofoils, they should be big enough to lift the boat above the water, but not so large that they create too much drag.

Finally, the placement and size of the hydrofoils must be carefully calculated to ensure the boat can reach its maximum speed while remaining stable.

It is also important to consider the weight of the boat and its passengers when designing a hydrofoil catamaran, as this will affect the performance of the hydrofoils.

By taking all of these factors into consideration, engineers can design hydrofoil catamarans that are both fast and stable, providing an enjoyable and efficient ride.

Examples of Hydrofoil Catamarans

Hydrofoil catamarans come in a variety of shapes and sizes, making them suitable for a variety of applications.

Popular examples of hydrofoil catamarans include the America’s Cup boats, the A-class catamaran, as well as the Nacra and Tornado catamarans.

The America’s Cup boats are the fastest boats in the world and are designed to achieve speeds of up to 50 knots.

The A-class catamarans are lightweight and designed for racing, while the Nacra and Tornado catamarans are designed for recreational sailing.

Each of these boats use hydrofoils to reduce drag and improve performance.

In addition to recreational and competitive sailing, hydrofoil catamarans are also used for transportation.

The Sea Eagle is a high-speed ferry that uses hydrofoils to reduce drag and increase its top speed.

The ferry is capable of carrying up to 250 passengers and can reach speeds of up to 50 knots.

Other examples of hydrofoil catamarans include the hovercraft, which uses a combination of air and water pressure to lift the vessel above the water, and the AirFish, which uses a combination of air and water pressure to fly above the water.

Hydrofoil catamarans are an efficient and fast way to travel on the water, making them popular for recreational and competitive sailing, as well as for transportation applications.

The hydrofoils reduce drag and increase performance, allowing these boats to reach speeds of up to 50 knots.

The design of the hydrofoils can also be adjusted to match the speed of the vessel, allowing for a smoother and more efficient ride.

Safety Precautions for Hydrofoil Catamarans

Hydrofoil catamarans are a popular choice for recreational and competitive sailing due to their efficiency and speed.

However, these vessels require extra caution to ensure the safety of all passengers.

Before operating a hydrofoil catamaran, it is important to understand the safety precautions needed to ensure an enjoyable and safe experience.

First, always wear a personal floatation device (PFD) when operating a hydrofoil catamaran.

This will provide a layer of protection if you fall overboard.

Additionally, if the hull of the boat is lifted above the water, it is important to check the area for any debris or objects that may be submerged.

This could cause damage to the boat or injure passengers.

It is also important to check the weather conditions before going out on a hydrofoil catamaran.

Wind, waves, and storms can all be hazardous for these vessels.

They are not suitable for rough water and should be avoided during inclement weather.

Additionally, it is important to check the engine and fuel levels before embarking on any voyage.

Finally, it is important to understand the limitations of the hydrofoil catamaran.

These vessels are designed for speed and maneuverability, not stability.

They are not intended for large groups or for carrying heavy cargo.

The hydrofoil system can also be easily damaged by impacts with rocks and other objects so it is important to be aware of your surroundings and avoid any obstacles.

By taking the proper safety precautions, you can ensure an enjoyable and safe experience while operating a hydrofoil catamaran.

Always wear a PFD, check the weather conditions, and understand the limitations of the vessel before going out on the water.

With the proper preparation, you can enjoy the speed and efficiency of a hydrofoil catamaran for many years to come.

Final Thoughts

Hydrofoil catamarans are a unique type of boat that offers an efficient, fast, and smooth sailing experience.

The hydrofoils lift the hull out of the water, reducing drag and wave resistance, allowing the boat to glide through the water.

With the right design considerations and safety precautions, hydrofoil catamarans can be an enjoyable and safe way to travel on the water.

If youre looking for a fast and efficient way to get out on the water, hydrofoil catamarans may be the perfect option for you.

James Frami

At the age of 15, he and four other friends from his neighborhood constructed their first boat. He has been sailing for almost 30 years and has a wealth of knowledge that he wants to share with others.

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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.

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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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• Digital Edition

Extraordinary boats: TF35 semi-automated foiler

• August 9, 2021

The TF35 is a new one-design catamaran with a unique computer-controlled automatic foil system, that will race in the TF35 Trophy. We get all the info on these incredible foiling catamarans

In recent America’s Cups we have seen a small army of grinders pumping away to bring pressure to their flying yacht’s hydraulic lifeblood, while flight controllers attempt to keep up with their speeding craft’s accelerations in three dimensions. But while these athletic and technical skills are impressive, these days there are simply better alternatives to humans carrying out these roles. Enter the TF35.

The TF35 is a new one design foiling catamaran created to take foil-borne sailing to the next level. It has no hydraulics to keep primed. Conventional ropes and winches handle the sails and raising and lowering of foils, but battery powered electric actuators drive the rest, including split-second adjustments of the foils and rudder elevators. What’s more, these operations are automated, leaving crew free to focus on skills such as helming and tactics.

The shape, size and efficiency of the TF35’s foils means it requires just seven knots of wind to take off upwind and nine downwind (when boat speed reaches 2x and 3x wind speed respectively). It also passes the acid test of foiling upwind and through tacks.

The racks increase righting moment but also protect the foils when alongside pontoons and improve crew safety. Photo: Loris von Siebenthal

A small penalty for having such light wind take-off is ultimate top speed, which is 18-19 knots upwind and 34-35 knots downwind, but still plenty fast enough.

After the prototype launched at the end of 2019, the new TF35 is enjoying its first full season of competition this year. The class follows on from the D35, the one design catamaran that provided sterling service on Lake Geneva for 16 years and countless Bol d’Or Mirabaud victories for Ernesto Bertarelli’s Alinghi , his sister Dona’s Ladycat-Spindrift and many others.

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Aside from becoming fully foiling, a significant difference between the two boats is that the TF35 is designed to race not just on lakes but also on open water, and this year the circuit will include events in Scarlino, Italy, in September.

Behind the TF35 is an America’s Cup-level design team led by Gonzalo Redondo of d3 Applied Technologies, who most recently headed the CFD team for American Magic . On structures is Cup veteran Dirk Kramers with Swiss genius Luc du Bois on the design and flight control system, plus Britain’s own Adam May, Marc Menec and Jean-Marie Fragniere.

The majority of the TF35’s components were created in Brittany with Multiplast building the hulls, beams by Airbus, and Heol Composites fabricating the intricate foils. Spars are from Lorima, with some of the few non-French parts including carbon diamonds and PBO shrouds from Future Fibres.

The mainsail foot touches the central hull to create an endplate effect, but requires an unusual half-wishbone boom. Photo: Loris von Siebenthal

Surprisingly, the TF35’s platform was one of its least important parts. The aim was to remove every gram of weight while maintaining a structure stiff enough to prevent deformation due to high foil and rig loads.

The D35’s flying central hull now terminates beneath the mast with a long, heavily-rigged bowsprit protruding more than 4.5m forward of the bows. The rig is relatively conventional for a modern day multihull, with a wing section rotating spar and sails that, thanks to the boat’s near permanent upwind apparent wind angle, are never eased far.

To reduce weight the mast has a diamond and a two-part construction, allowing it to fit into a 40ft container along with the boat.

The mainsail is a ‘deck sweeper’, with part of the foot touching the flat deck of the centre hull, creating an end plate to increase the sail’s efficiency. However, this requires an unusual boom – it is curved, like half of a windsurfer’s wishbone boom.

The foil sits inside its own case enabling it to be raised/lowered in manoeuvres. The case can be inclined using a worm drive to alter overall rake

Understandably, much of the development has been focussed on the TF35’s foils, their operation and software control.

Most other flying cats have J-shaped lifting foils, with some ‘V’ (dihedral). This shape provides some inherent ride height stability (the more immersed the foil becomes, the more surface area there is to provide lift) without requiring constant trimming.

However, due to the foils on the TF35 being computer controlled this is less necessary, so they can have a more efficient, flatter and less draggy shape, albeit with a massive 2.7m span.

TF35 auto adjustment

On most flying catamarans the amount of lift a foil produces is determined by its rake. On the TF35 rake of the entire foil is controlled by a rope-driven worm-drive. This is a broad brush setting, determined by conditions, point of sail, wave state, etc.

The T-foils span 2.7m; substantial but necessary to achieve light wind lift off. Photo:

Split second adjustment of the amount of lift comes from an aircraft wing-style flap on its trailing edge which is able to articulate by up to 5°. This demanded some intricate construction but its operation requires substantially less power than adjusting the rake of the entire foil.

Compared to the main foils, the TF35’s rudders are a simpler inverted ‘T’ configuration with the shaft on each fitting into a cassette attached to each transom via gudgeons and pintles.

Like the main foil, lift is also adjusted by computer/electric actuator via a flap on the elevator’s trailing edge. The amount of rudder lift determines the overall pitch of the boat. This, in turn, affects the rake of the main foils, thus trimming them in conjunction is vital – another job that’s vastly improved by automation.

A key feature of the AC50 s was rudder differential – ie negative lift in the windward elevator, or a downward force that dramatically increases righting moment.

The TF35 also offers rudder differential, but to a much more limited degree. The automation means crew only have the option of switching rudder differential on or off, similarly they have just four settings for ride height and overall boat pitch.

This leaves the software to ensure that foils are trimmed to the optimum and that rudder differential (where loads can quickly spiral out of control) never causes structural limits to be exceeded.

The main lifting foil hangs off the end of a titanium bulb, with its trailing edge flaps all but invisible

The computer is stored alongside a lithium-ion battery within the central flying hull, controlling four electric motors operating trim flaps – a relatively straightforward system. However, the software behind it, monitoring parameters such as ride height, 3D attitude and accelerations with split second accuracy, is monumentally complex. It requires a multitude of sensors from state of the art GPS to ultrasonic altitude sensors and rate gyros.

While maxi racing yachts with complex hydraulic systems typically use a programmable logic controller (PLC), so the TF35 has a similarly programmable brain, the difference being that it is electronic, controlled via software.

This is especially tested during manoeuvres, when the software must recognise when two foils are in the water and the boat is developing twice its usual lift. So vital is this software that it’s one of the TF35’s strictest one design elements.

As a piece of ground-breaking technology, the TF35 is perhaps the first one-design class to have its own operating system.

TF35 specifications

Hull length: 10.85m / 35ft 7in Beam: 6.30m / 20ft 7in Draught: 2.45m / 8ft 10in Mast height: 21m / 68ft 11in Weight: 1,300kg / 2,866lb Sail area Mainsail: 79m² / 850ft2 Sail area Jib: 34-41m² / 365-440ft2 Sail area Gennaker: 120-140m² / 1,290-1,506ft2

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How SailGP’s foiling F50 catamarans sail so much faster than the wind

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” iFLY – Born to FLY “

Just enjoy foiling, ” high performance sailing “, ” we love speed “, ” join the adventure “.

iFLY15 – Technical SPECS

Length 4.63 m, 15 ft..

A Foiling Catamaran for 1-2 person(s) does not need to be any longer than this. The ancient rule that says you need length to achieve speed does not apply, as hulls do not touch the water at most times.

Width 2.50 m.

This width provides plenty of righting moment, still being road legal ato be transported in horizontal position without disassembly.

7.5 m mast / 11.2 sqm mainsail

7.5 m mast with 11.2 sqm deck-sweeper mainsail. – 8.5 m mast on iFLY RAZZOR Pro with bigger rig

Draft: 95 cm

Weight: 90 kg.

90 kg ready to sail. A very light boat, providing nonetheless excellent stability for everyday suitability.

Crew 1-2 - max.180kg

Flysafe® foil control.

T-Foils Main Foils and Rudders FlySafe automatic dynamic foil control Additional Option: Main Foil Differential >>>

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LATEST DEVELOPMENT OF “DECK SWEEPING” MAINSAIL THE ROLLABLE HERU WING RIG LIGHT WIND FORESAIL «CodeF»

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Looking for the perfect setup for your foiling sailboat.

We can recommend the best iFLY setup and accessories for your boat. Get in touch for the ultimate sailing experience!

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A great number of innovations all over the catamaran and the perfect match of all components allow controlled high-speed foiling experience. iFLY15 is full of innovations, e.g. in hull design, hydrofoils, rudders, automatic flight control system, two-layer wing trampoline, high performance rig…

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full carbon – lightweight – performance design: Born to foil

High Performance Rig Options

LATEST DEVELOPMENT OF “DECK SWEEPING” MAINSAIL WORLD PREMIERE: THE ROLLABLE HERU WING RIG : WORLD PREMIERE: LIGHT WIND FORESAIL «CodeF». ALLOWS UPWIND FOILING (as well as other courses/points) ALREADY IN EXTREMELY LIGHT BREEZE. Know More >>>

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AERODYNAMIC INNOVATIVE WING TRAMPOLINE CREATING LIFT.

Full Carbon T-Foils 

SCIENTIFICALLY DEVELOPED high-end foils for early take off, high speed and maximum stability.

flySafe® dynamic foil control system

The foils are controlled independently, dynamically and precisely on both sides by the flySafe® foil control system . This enables high performance sailing through stable flight. The unique foil control system of IFLY15 is a 7 years proven system developed by CEC Catamarans.        Know More >>>

IFLY MAIN FOIL DIFFERENTIAL TECHNOLOGY

MDT FOIL CONTROL – iFLY rake control The sophisticated main foil differential is an active flight assistance – The Rake is adjustable while sailing. Advanced Rake Control is for the experienced, performance-oriented Catamaran sailors / pro sailors and is a feature on the iFLY RAZZOR Pro.      Know More >>>

Innovations and more   >>>

In the hand of the experienced sailor, iFLY15 is a high-performance racing machine. STABILITY IS NOT CONTRADICTORY TO HIGH PERFORMANCE OR SPORTINESS , on the contrary, it is a prerequisite for safe reaching and maintaining constant high speeds. Stable flight allows the sailor to concentrate on the course, on the wind, as well as on opponents and strategy – rather than permanently getting distracted by working on the foiling balance.

EARLY TAKE OFF IN WINDS AS LOW AS 2Bft. / 6 KNOTS , by combining the innovative “KickOff” foil control with a trampoline that provides boost and with the latest generation of rig and foils.

BOAT SPEEDS FAR BEYOND DOUBLE WIND SPEED CAN BE ACHIEVED . Enjoy high speed foiling with top speeds far beyond 25 knots – in ideal conditions up to 30 knots.

CONTROLLED FOILING EVEN IN THE UPPER WIND RANGE BEYOND 22KNOTS OF WIND SPEED – supported by the new FlySafe® Automatic Foil System.

FOILING PLEASURE AND PERFORMANCE ALSO IN CHOPPY WATERS

FREEDOM ! FLYING SOLO OR OPTIONAL WITH CREW . You have the choice. No manhunt for crew. But still enjoy the opportunity of taking a friend or family to fly with you. Up to 140kg of crew weight. (To keep the boat and especially the mast light, we specified the iFLY15 components intentionally not for double trapeze.)

NO HOISTING AND LOWERING OF DAGGERBOARDS while sailing. (Only for beaching or in shallow waters.)

FREEDOM TO SWITCH BETWEEN FLYING MODE OR SAILING AS A CONVENTIONAL CATAMARAN (with at least the leeward hull touching the water). Within seconds iFLY15 can be switched to Non-Flight mode, even while sailing. In that mode, iFLY15 will not take off, but the foils will still create lift and give an extra agile sailing behavior, which is on the same time very stable as rudder Foils will avoid pitch poling. Non-Flight mode is providing additional security in extreme high wind speeds. It is also useful for less experienced sailors or in all situations, where taking off is undesirable (e.g. in the harbor or while towing…).

EASY TO LEARN FLYING BY AVERAGE SKILLED AND TRAINED SAILORS

EASY BEACHING AND SLIPPING , as simple as with any conventional beach catamaran by using a standard catamaran beach trolley. Foils remain flat under the keel, with the daggerboard lifted as on a conventional catamaran.

SIMPLE TO DISASSEMBLE PLATFORM . Width of 2.50m is also road legal in most countries for horizontal transport without disassembly.

DAGGERBOARDS CAN BE PLUGGED IN FROM ABOVE and Foils securely anchored from below with one central screw.

FAST SET-UP OF THE iFLY15 FROM ROAD TRAILER TO SAILING . Simple rigging the mast, no genacker boom, no foresail, no spi.

SILENT AND CALM PLANING ABOVE THE WAVES . Flight height of up to 90cm, avoiding even high waves below.

EASY TO FOIL THE JIBE (without landing). Stable maneuvers are made easier by the fact that the four T-Foils always remain in the water.

« INTERNATIONAL FORMULA 15 FOIL » Class Association. The new development class for FOILING, SINGLE HANDED on MULTIHULLS. Multi manufacturer class in the tradition of a Formula18, A-Class or international Moth. Enables large regatta fields and evolution of the boats, following the technical progress (which is especially essential in the case in Foiling). Strict regulations to avoid uncontrolled exaggerated development.

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The iflysail team, is looking forward to your message, more to know about ifly foiling , interesting tech, high performance rig options >>>, flysafe® dynamic foil control system >>>, ifly main foil differential technology >>>.

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New Hope 40: A Power Cat with Foils

At first glance, the Hope 40 looks like another Down East picnic boat, but with a slightly broken sheer line. But then take a look under the hull. It’s a state-of-the-art power catamaran with hydrofoil technology.

The new Hope 40 is the brainchild of McCullough Yachts in Newport, Rhode Island, and it’s going to be built at Front Street Shipyard in Belfast, Maine. On its website, McCullough says, “For years customers have asked us why existing power catamarans look like futuristic alien spacecraft.” They say their reply is the Hope 40, “an attractive vessel that still utilizes the smooth riding characteristics of a foil-assisted power catamaran.”

The main foil on the Hope 40 has an adjustable angle of attack and is fully retractable at the push of a button. The boat has two options for propulsion: twin 600-hp Mercury outboards, or twin 550-hp Yanmar diesels linked to Hamilton jet drives. The outboards offer high performance, while the inboard/jet drive offers reliability and safety, according to McCullough.

For accommodations, there’s a queen-sized berth in the bow, and a guest cabin with two berths a bit aft. The new cat has two heads, one with a separate shower. The galley is up on the bridge deck.

We don’t have more details yet, but we’ll be following the progress of this interesting new boat.

Specs.: LOA: 43’; Beam: 16’5”; Draft: 1’9”; Disp.: 18,000 lbs. Fuel: NA; Water: NA; Power: 2×600-hp Mercury outboards or 2/550-hp Yanmar diesels with Hamilton water jet drives. Read more:

http://mcculloughyachts.com

http://frontstreetshipyard.com

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Designed with a singular vision...To deliver unmatched performance and efficiency!

Introducing the insetta 35ifc  – the bar has been raised.

The Insetta 35IFC was designed with a singular vision… to be the best-performing center console sport fishing catamaran in its class.  Enjoy unmatched performance, range, and efficiency thanks to the 35IFC’s hydrofoil-assisted design.

In addition to being the best High-Performance Fishing Catamaran in its class, it also provides a smoother and dryer ride in the rough stuff!

This boat was designed for people who fish, by people who fish!  From its integrated livewells to its cavernous coffin boxes, level open deck layout, massive insulated storage and so much more, this boat was designed for maximum range and fishability!

Here’s what our customers have to say: “Holy crap do I love my 35 IFC with the Merc 300 V8’s on the back. We ran her down to Key Largo the other day, snorkeled all day, got lunch at Shipwrecks Bar and Grill, and ran back. Cruised between 40 and 45 mph, mostly around 42. So smooth it’s nuts. Burned maaaayyybe 40 gallons for the whole day. As we cruised the dashboard was telling us between 1.7 and 1.8 mpg, but I’m pretty sure we cruised more than 40 miles and burned between 35 and 40 gallons, no more. So… suffice it to say that you guys have absolutely crushed it and changed the game here. Fantastic work”! – Alan, Hull #4

Check out our FAQ’s section below for more about the Insetta 35 with  IFC!

Specifications

Length Overall

Maximum Beam

Maximum Draft

Fuel Capacity

Cruise Speed

Cruise Miles Per Gallon (MPG)

Over 850 miles*

Cruise Range

Standard Features

Standard “Insetta White” Gelcoat Molded in Diamond Non-Skid Tackle Storage Stbd Side Tackle Storage Port Side 19 Gallon Freshwater Washdown/Shower 5 x In Deck Storage Hatch 2 x In Deck Macerated Fish Boxes 625 Qt Insulated Coffin Box, Split Boxes Walk through Transom Access (Door Optional) Two 36 gallon Integrated Transom Livewells Fresh and Raw Water Washdown 34 Rod Holders (gunnels and coffin box) 7 Stainless Gemlux Pull-Up Cleats LED Navigation Lights Boarding Ladder

Recessed Stainless Bow Rail

Helm / Console

Fiberglass Hardtop with Powder Coated Aluminum Supports Tempered Safety Glass Enclosure for Console 6 Integral Rod Holders Built into Rear Support Molded Fiberglass Leaning Post with Rear Face Seating and cooler 3 Wide Helm Seats 6 S/S Cup Holders Storage Box and Rigging Tray on Rear Facing Seat Storage Drawers Under Helm Seats 165 Qt Leaning Post Ice Box Located Under Rear Face Seats

Base Upholstery

Equipment and Electronics

3 Part Internal Foil System

3 Pump Capacity Sea Chest with Dual Livewell Pumps & Raw Water Feed

4 1100 GPH Bilge Pumps (2 in Each Sponson)

Standard Capacities

490 gallon fuel capacity.

625 Qt Insulated Coffin Box with Divider

165 Qt Leaning Post Ice box

Dual 36 Gallon Livewells

19 Gallon Freshwater

Frequently Asked Questions

IFC is Insetta Boatwork's Internal Foiling System.

You can expect a significant increase in cruise speed; Improved handling and stability in rough conditions; Better acceleration; A boat that is less affected by increased payload; A 20-40% increase in fuel efficiency; and a 20-40% further cruise range! Additionally, the IFC technology will also provide a drier ride in choppy conditions and Provide for more responsiveness when turning at speed!

The system is a fixed setup, there is nothing to operate and there are zero moving parts.

The IFC Technology in effect smooths out rough seas by allowing the boat to run from wave crest to wave crest at a relatively smooth and stable attitude. The IFC System creates lift which help to in effect “Carry” the hull higher in the water. The system acts as a set of wings carrying the boat at speed, keeping the hull from having to follow each wave across its entire contour. In other words the surface of the waves have less effect on the hull as the IFC system is lifting the boat. Additionally, the aerodynamic lift created by the catamaran hulls creates even more lift at the bow of the boat, keeping the nose high and preventing the “slamming” or sneezing found in other catamaran hulls.

No, you don’t. The foils are flush mounted to the bottom of the keels of each sponson (as well as up in the tunnel.) At its centerline the main foil of the IFC system is only slightly lower than the keel line. The boat will easily load onto a standard catamaran trailer. There is no big contraption hanging way down under the boat.

Remember, the foils are INTERNAL to the tunnel. At its lowest point the main foil is only slightly lower than the hull and is higher than the props. Because of this the odds of striking the foils are extremely low. The boat is designed to be lifted by the foil. The structural integrity of the foil system is such that the weight of the boat could be supported many times over by the foil. As such, if you did somehow manage to strike the foil on something EXTREMELY SUBSTANTIAL, like a stone shoal, the likely outcome is that you may (in a very worst case scenario) bend or break a foil wing. If that were to happen, you could still operate the boat to port with the remaining foils. The IFC foils are made from a very high-grade stainless steel and designed to meet or exceed relevant guidelines for impact and strength.

As water travels through the tunnel and around the foil, a tremendous vortex is created. This force keeps most debris from being trapped in the tunnel or around the foil. Between the pressure of the air moving through the tunnel, and the vortex created in the water, the tunnel and foils will stay clean and clear.

The outboards of the 35 IFC are mounted on a slight outward angle to place the propellers properly to maximize the thrust and flow efficiency created as the water travels through the tunnel and around the foils. This mounting also helps the boat to lean into a corner, much like a monohull.

Firstly, we’d ask, “Why would you want to?” But the short answer is no. IFC is an integrated system that is integral to the design of the boat.

The short answer is that boats with technology similar to IFC have been in use for many years, but not in the recreational market. Commercial and Military applications are quite prevalent. The initial design of a hull and system like this is quite complex and can be cost prohibitive. We at Insetta feel the gains in efficiency, speed, range and ride quality far outweigh the initial design and build cost.

Upon deciding to build a foiling Cat, Insetta assembled a team of naval Architects and Marine Engineers to refine an existing and proven design. Using their own state of the art construction techniques, Insetta brought an application specific version to the fiberglass Center Console market.

Optional Features

Customizable Garmin or Simrad Electronics JL Audio 10 Speaker Stereo System Flush Mount Acrylic Helm Bow Shade Custom Gelcoat or Combination of Colors Deluxe Upholstery Third Center Livewell Under Rear Facing Seat 40 gallon Seadek Flooring or Flexiteek Decking Additional Gunnel Rod Holders (18 standard) Recessed Wireless Phone Chargers Swivel Base Rod Holders Outlets for Electric Reels Additional Drink Holders on Leaning Post, Coffin Box, Gunnels and Helm Forward/Rear/Side Spreader Lights T-Top Outrigger Bases/Poles Gemlux Electric Head With 19 Gallon Blackwater Holding Tank Freshwater Sink and Vanity Inside Console Underwater Lights Heavy Duty Dive Ladder LED Under Gunnel Lighting On-Board Battery Charger Windlass Custom Aluminum Trailer Cockpit Table/Bow Table

Why did Insetta Boatworks decide to build a boat with IFC?

For decades, Hydrofoil power boats have proven to be the most efficient craft for a variety of offshore operations.

While pursuing a B.S. in physics in 1960, Victor Insetta was employed doing anti-submarine research that utilized high speed Deep-V patrol boats equipped with hydrofoils. Their ability to pursue submarines at high speed, operate safely offshore, and, being foil borne: allowed their hull to run clear of the water avoiding direct hits from torpedoes. Decades later, Vic and his family rode comfortably on hydrofoil ferries in Italy, flying over white capped waves in the bay of Naples.

In 2017, The Insetta 45 was chosen to be the official chase boat of the America’s cup! Four 45’ Insetta’s catamarans were shipped to Bermuda to assist at various cup events. Sailboats, competing from several countries, were catamarans with hydrofoils ! The Insetta 45’s ran parallel to these “foiling sail cats” to assist with TV coverage. The sailing cats were traveling at speeds approaching 50 mph, 2 ½ times the wind speed . Efficient … you bet . They could also turn on a dime at over 40 mph…

It became obvious: that a foiling cat would make a great offshore outboard power boat… Many foil power boat designs in the past, had wide foils that stuck out the sides, increasing their beam and draft. It made them difficult to dock, and they couldn’t operate in shallow waters. Joel Shine (chief operating officer) of Insetta Boatworks found a catamaran design that had hydrofoils mounted in the tunnel, (that location between the tunnel walls actually improves their efficiency), and does not add to its draft. Further improvements could be added by using our ultra-light high strength infused composite construction.

Joel, Vic and our technical staff reviewed the foiling cat’s initial specifications and performance data, and then sea trialed two foiling cats with internal hydrofoils. Our staff includes a second physicist and pilot… Glen Dobbs. We are all active boaters and we determined we would build our version of a foiling outboard powered cat. We contacted a Naval architect, who designed several successful foiling power cats . He is now a member of our technical staff.

Our 35 “foiling cat” design has set the standard for Foil-Assisted Sportfishing boats. The hull, foils, materials, and engines are synergistically combined, to provide: unrivaled high-speed cruising efficiency , and provide safe offshore handling, with unimpeded shallow water operation, including beaching, without foils or props contacting the bottom.

Insetta 35IFC

The premier internal foiling catamaran.

Integrated 36 Gallon Livewells & 625 QT Coffin Box Standard

Designed to fish.

850+ Mile Range!

Best in Class MPG, Smoother/Dryer Ride!

Performance.

Click the button below to contact or email us for more info!

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The Foiling Press – February 2024 – February was a busy month for…

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We kicked off the year with a full house here at Insetta Boatworks! Three beautiful 35IFC’s in…

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SIT&FLY

you can  fly

THAT FLIES ALONE

Extended version on your desktop computer

A foiler designed for any sailor.

The idea was to create a SIT & FLY foiler, that is to say a boat with foils that practically flew alone, and endow it with an exceptional stability so that any sailor could fly easily, regardless of their physical or technical preparation, also allowing them to access into the competition with foils so far suitable for only a few specialists.

The mothquito foiling catamaran perfectly meets this objective. proof of this is that none of our riders had ever flown on a boat with foils before and as you will see in the videos they all fly without any difficulty. , i sincerely believe that it is the best guarantee that the mothquito is made for you., you will soon be able to try it for yourself. happy flight.

Designer and CEO:

IFS Foiling & MOTHQUITO

THE BOAT THAT FLIES ALONE

The Mothquito Foiling Catamaran is the first foiler in the world with an increased dynamic stability and performance, by the IFS system, a system that increases its dynamic length and beam to make foiling easy, safe and fun for any sailor.

Due to this system, the Mothquito surprises with its great stability, both at take-off and during flight, requiring the crew member simply the same physical effort that would be required to sail in any conventional dinghy boat without trapeze and without the need for a special technique.  

In the Mothquito you just have to sit down to sail and the boat will practically will flies alone.

For all these reasons, the Mothquito is an easy and suitable foiler for all types of sailors, a true SIT & FLY.

At the same time, it can be a fundamental tool for schools and training centers, which are increasingly in demand for easy-to-fly, stable, yet fast and fun foilers.

But make no mistake, the Mothquito is more than just a docile and stable foiler. The Mothquito is a high performance catamaran racer. With a dynamic beam in flight of 4.8 m2, this boat manages to significantly increase its righting moment, which allows it to have a sail area of ​​17.5 m2 in its basic configuration, to launch the boat at high speeds without heeling or feeling of risk.

With mothquito you don`t need:.

Previous experience.

Specific technical training.

Special physical preparation.

Navigate against heeling as in the Moth.

Hang on a trapeze compromising your safety.

Height sensors and flaps to regulate the flight height, since its V foils automatically regulate the height.

Increasing the dynamic length:

You increase longitudinal stability, improving dynamic longitudinal trim in flight and reducing the risk of nose dive and pitch poles., increasing the dynamic beam:, increased transverse stability is achieved, increasing righting moment and performance, with a significant reduction in heeling., that is why mothquito marks a before and after, a new concept in the world of foiling which is summarized in a single expression:, sit & fly.

With Mothquito you know how.

BACKGROUNDS

As foiling progresses, more and more fans and sailors want to experience the sensation of flying, even if only once.

But the reality is that many of them are in doubt as to whether they will be able to fly continuously and controlled, since flying these machines does not seem as easy as sitting down.

In many cases, it requires significant physical preparation and endurance to be able to keep the balance in flight based on counter-heeling, making counter balance and playing with the mainsail sheet hunting and molding to maintain balance and not repeatedly go overboard.

In other cases, as in the majority of catamarans, it will be necessary to hang on the trapezoid to reduce the heeling, and at high speeds the maneuvers are very fast and precise, so the risk in these circumstances does not It exactly coincides with the idea of ​​enjoy it.

In summary we can group the current foilers into 3 large groups:

They are small foilers, monohull or multihull, for a single handed and they have a central inverted T-foil and another inverted T-foil in rudder on the same line. When they are monohull, flying on these boats without falling into the water is not easy. You have to establish a continuous balance by flying against heeling and keep your balance playing with the main sheet, and your weight.

In the case of multihulls, the outer hulls act as a float to stop preventing the overturns, as the small lateral wheels do on a bicycle when the child learns. but this solution does not eliminate the difficulty of the flight and slows down the speed of the boat every time the float enters into the water. they also use flaps with mechanical height sensors to control the flight height, and therefore require care and maintenance., they are dinghy catamarans for single or double handed and have four inverted t-foils., with a dynamic beam of around 2.5 m, which usually coincides with their hull beam, these foilers are much more stable than the 2t foils, but in them the use of trapezoids is usually common to compensate the heeling, which not everyone likes and less at high speeds., they also use flaps with mechanical height sensors to control the flight height, and therefore require care and maintenance., 2j + 2t foils, they are high-performance catamarans, of greater length and for more than two or three crew. it is common to see them compete on international circuits. their main foils are in j, which is the same as an underwater v when the boat heels, so they regulate the flight height without the need for flaps. they are very technical boats that require a lot of training and good physical shape. in addition they are not affordable since their price is usually not within the reach of every pockets..

If you are a training center or sailing school...

We are developing a strategic plan for the commercialization and international expansion of the Mothquito that may interest you.

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Using Hydrofoils to Improve Boat Performance

• By Capt. Vincent Daniello
• March 15, 2024

In my early days as a captain, few boats cruised faster than 30 mph. Back then, bigger engines and the fuel they burned added too much weight, netting little more speed. Today, even modest performers top 50 mph thanks to lighter engines and boat construction, where more ponies push fewer pounds.

Electric propulsion leaves boats yet again ­struggling in that extra-­pounds paradigm. ­Adding fuel—­ measured in kilowatt-­hours of lithium batteries—attenuates attempts to go faster and farther, at least until batteries become lighter. But there might be another way. I tested an electric-powered SunTracker Party Barge 22 DLX both before and after Hydrofin installed its hydrofoil system, which lifts a boat while moving through the water. This effectively overcame 800 pounds of lithium iron phosphate (LiFePO4) batteries—40 kilowatt-hours—that fueled twin Elco EP-50 electric outboards. In the end, flying on foils increased the boat’s speed by well more than a third and improved efficiency markedly. So, what are hydrofoils, and can they enhance performance aboard other boats too?

Performance Takes Flight

“We’re a long way from batteries that provide lightweight energy. Our hydrofoils create lift to overcome that additional weight,” says Jason Minor, Hydrofin’s founder. The patented system, engineered by noted catamaran and America’s Cup sailing foil-design firm ­Morrelli & Melvin of ­Newport Beach, ­California, utilizes powder-coated aluminum foils—essentially underwater wings. Mounting pads epoxied to hulls allow incremental adjustment of location and angle of attack, so Hydrofin foils lift nearly half a boat’s weight. “A typical bi-toon with a gas 150 runs around 30 mph. Adding Hydrofin foils can easily make it run 37 to 39 mph,” Minor says, adding that 30 percent better economy is common at cruising speeds. Riding higher on wings makes boats run smoother, dryer and quieter too. (See our Hydrofin test on a Misty Harbor 2528 pontoon with a Merc 150 hp gas outboard at boatingmag.com/hydrofin .)

Put to the Test

Hydrofin foils lifted so much battery weight that our Elco-powered test boat required larger propellers to see full improvement. Comparing performance from the final propellers, with foils removed, the boat reached 17.2 mph turning just 5,400 rpm and drawing an overloaded 67.2 kW. With ­Hydrofin foils installed, those same props turned 5,750 rpm to reach 24.9 mph at 58.56 kW. The original propellers, without hydrofoils, reached 6,000 rpm and 17.9 mph while consuming 49.06 kW, which we used to compute 39 percent increased speed and 16 percent improved efficiency with hydrofoils installed.

Worth the Weight

Minor says that about one-third of installations benefit from new props, which is expected when essentially lightening a boat by half. Those underwater wings alleviate passenger weight too, which often impacts gas-powered pontoon boatspeed. “A boat might lose 6 or 8 mph when full of people,” Minor says, versus carrying minimal crew. “That same boat would see just a 2 or 3 mph drop with our hydrofoils installed.”

Tri-toons, with lift from a third hull and planing strakes, tend to benefit a bit less. Minor says that gas tri-toons typically see 15 to 25 percent increase in speed or fuel economy. On a 25-foot Qwest Tri-toon powered with a prototype 350 hp equivalent Hyper Electric outboard and 1,150 pounds of batteries, Minor reported that the boat gained from 15 percent to 29 percent efficiency in the 20 to 35 mph cruising range. Hydrofin foils proved 7 percent more efficient at 43 mph, which was wide-open throttle without the foils, and they added 6 mph top speed, reaching 49 mph at the same 270 kW. (See our test of the Hyper Electric in ­Motorhead on page 74.)

Foil Downsides

While Minor was installing the Elco-powered test boat’s foils—about a half-day procedure—I kept an eye out for pitfalls. Foils increase draft by about 4 inches, but they’re ­mounted well aft of amidships, where they shouldn’t interfere at most beaches. Modifying the boat trailer’s inner bunk impacted aligning the boat back onto the trailer at the ramp, but this can be easily remedied with side guide pipes common on monohull trailers. In a hard grounding or collision, foils are engineered to break away, and Minor reports no damage to hulls or mounting pads, only foils themselves, in the few times it has occurred. Operating in very shallow water would surely be problematic, but Hydrofin’s optional electric-actuated system fully retracts well above a ­pontoon’s bottom.

Other Boats

Hydrofin’s system adapts to nearly all pontoon and tri-toon boats, and they’ll work on small power catamarans but not monohulls. “The foils need a gap away from the hull,” Minor explains, which comes when they’re mounted between two hulls. Hydrofin’s foils also won’t work past about 55 mph, when water flow causes foil cavitation.

Long-standing ­wisdom maintains that more ponies pushing fewer pounds increases speed. That’s still true, but Hydrofin shows that boats can also grow wings and fly.

How Hydrofin Foils Attach to the Hull

On twin-hull boats, Hydrofin hydrofoils mount to pads epoxied to hulls between pontoons, with braces extending upward to the deck. Foil location and angle of attack adjust fore-and-aft trim and total lift. Finlets mounted aft add more lift to further tweak the boat’s  ride and trim.

Oversize fins, chosen to carry battery weight, range from 343 to 1,822 pounds lift at 25 mph. 

Tri-toons utilize a modified mount and fins that ­create from 537 to 1,021 pounds of lift at 25 mph, where a 25-foot Qwest tri-toon with Hyper Electric ­Marine’s 350 hp electric outboard was 29 percent more efficient with Hydrofin foils installed, while top speed increased by 6 mph, according to Hydrofin.

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