foil assisted catamaran

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Unique Engineering

The foil assist.

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

The New Paradigm

• High Quality
• Unmatched Performance & Efficiency
• Unlike Any Other Center Console on The Market

What People Are Saying

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.

LINX TENDERS ARE HIGH-SPEED HYDROFOIL-SUPPORTED PLANING CATAMARANS

Shallow draft catamaran hulls, linx30 highlights.

Linx 30 Showcase

With beach-landing bow door option, linx30 360º viewer.

Cruising Speed

180 nm at 24 kts

Lightship weight

From 3000 kg

Max displacement

Fuel Capacity

400 - 600 l

HYDROFOIL SUPPORTED PLANING CATAMARAN

Hull technology (hspc), excellent stability for sport fishing and diving, twin inboard diesels, or twin outboard engine options, customisable deck options - open layout, or cabin versions, folding carbon fibre bimini & low profile hull for onboard stowage, customisable options.

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• BMCOMPOSITES Edificio Espigon Exterior Global Building Oficina 7 07012 – Palma De Mallorca

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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!

Latest News

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

The Foiling Press – January 2024

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

The Foiling Press – December 2023

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The Foiling Press – July 2024

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Infiniti 60: Concept Yachts presents new 18m foil-assisted catamaran

British yachtbuilders Concept Yachts and Infiniti Yachts have teamed up to introduce a new 18.3-metre multihull model to the market. Named Infiniti 60 Powercat, the yacht has sporty coupé styling and foiling technology that aims to reduce fuel consumption by 35 per cent. 

The yacht will be built in Southampton and will be the bigger sister of past Infiniti 36 and Infiniti 52 models, building on the successful existing collaboration between Concept Yachts and Infiniti Yachts. 

The yacht is designed for use as either a superyacht tender, a fishing vessel or as a compact liveaboard, with plenty of scope for customisation and the option to include two, three or four cabins. There are two main formats available; the standard is the Coupé, while there is also a Grand Tourer Flybridge version.

Design Unlimited has been brought in to style the yacht, and working together with Infiniti Yachts and Concept Yachts, has given the yacht a relatively modest beam of six metres which allows the yacht to berth in conventional slips. The catamaran is also "beachable", meaning it can transition from sea to land with ease.

Efficiency has been a top priority in the yacht's design, and the yacht has been built in resin-infused carbon fibre with multiple propulsion options available, including petrol, diesel and electric.

The retractable DSS foil comes as standard, and Gordon Kay, founder of Infiniti Yachts, was integral to developing the DSS that is fitted on the Baltic 142 foiling yacht Canova . 

Between them, Concept Yachts and Infiniti Yachts have over two decades of experience in the superyacht sector. 

Denison Yachting will also be working alongside Concept Yachts as its sales and marketing partner.

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McCollough Yachts

The Hope 40 combines traditional New England styling with a state of the art power catamaran utilizing hydrofoil technology. Classic “Down East” lines do not reveal that the Hope 40 utilizes a revolutionary foil package. The main foil of the Hope 40 has an adjustable angle of attack, and is fully retractable. In harbors where a foil between the hulls is a liability, the push of a button allows the foil hinge clear of entanglement.

For years customers have asked us why existing power catamarans look like futuristic alien spacecrafts?!? They challenged us to design an attractive vessel that still utilizes the smooth riding characteristics of a foil-assisted power catamaran.     The Hope 40 is our answer!

Conversation with Designer & Builder

This March 28, 2023 webinar with JB Turner of Front Street Shipyard, and David McCollough, goes into detail on what makes the Hope 40 special...

Propulsion that Meets Your Needs

Different propulsion systems make sense for different applications. The Hope 40 is offered with either 2 x 600hp Mercury outboards, or 2 x 550hp Yanmar inboard diesel engines mated to Hamilton Jet Drives. The outboards represent a high value package with amazing performance. The inboard / jet drive combination offers reliability and safety. Choose the option that fits your needs...

Hamilton Jet-Drives

Mercury Outboards

Design Specifications

Specifications are Subject to Change

Yachting World

• Digital Edition

Baltic 142: The superyacht bringing foiling technology into cruising

• Toby Hodges
• May 2, 2019

Foil-assisted cruising is the latest innovation to emerge from Baltic Yachts. We talk to the team behind the Baltic 142 to find out how it works

The Baltic 142 may not be using the hydrofoils popularised by the America’s Cup , but her 29ft 6in long (9m) horizontal sliding foil employs the same principle of lift to reduce heel and boost speed.

The designers of the Dynamic Stability System (DSS) say it could improve the performance of this super-cruiser by 20 per cent, delivering a sustained 25 knots – not bad for a superyacht with a predicted lightship displacement of 140 tonnes.

This is the first time the DSS has been used in superyachting, but its benefits will be used for comfortable, fast long-distance cruising rather than gaining an edge on the racecourse. All eyes will be on the Baltic 142 when she launches later this year and sets off on her first ocean passage. If the DSS does what is predicted, it could become commonplace.

The Baltic 142 is due to launch before the end of the year. Photo: facebook.com/balticyachts

Proven technology

The idea, developed by British naval architect Hugh Welbourn and Gordon Kay of Infiniti Yachts, has certainly proved itself on a smaller scale, reducing heel, increasing speed, damping pitching and adding an unexpected degree of steering control in lively conditions.

Gordon Kay, who was at the helm of the Infiniti 46 with its DSS deployed in almost 40 knots of breeze in the 2017 Rolex Middle Sea Race , said: “The boat sat at 28 knots, arrow straight, to the point when I wondered if there was any need for me to drive.”

But can these advantages transfer to a 140-tonner for which speeds in the mid-teens, let alone the 20s, would be considered exceptional? The brains trust behind the project believes they can. These include Baltic Yachts’ head of research and development Roland Kasslin, Farr Yacht Design president Patrick Shaughnessy, BAR Technologies chief technology officer Simon Schofield, Gurit engineering’s Simon Everest, plus Welbourn and Kay. Baltic Yachts’ ability to take on complex engineering challenges and meet them with the latest in lightweight advanced composite building techniques, is well documented.

1-tonne foil

As can be seen in the diagram above, the carbon foil, weighing 1 tonne, will sit in a casing built into the bilge of the Baltic 142 just below the waterline and slightly aft of amidships. As it happens it runs directly beneath the owner’s double berth.

When not deployed the tips of the foil will be just visible, but when in use it will protrude a massive 22ft (6.5m) to leeward. It is designed to be deployed at speed at which point some 40 tonnes of lift can be generated pushing the Baltic 142 upright with a corresponding increase in speed.

Speeds of 25 knots

Gordon Kay says that a conventionally designed yacht beam reaching in 25 knots of wind would heel to just over 20 degrees, but with the foil working heel would be restricted to just 9 degrees and there’s a consequential increase in boat speed. In 25 knots of wind the Baltic 142 could reach sustained speeds of 25 knots depending on sea conditions.

In addition, any pitching motion can be reduced. So apart from speed, the increase in comfort levels is equally appealing. Because the foil is able to generate a large proportion of the Baltic 142’s righting moment, displacement and hull volume can be reduced, although this has presented it own problems.

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It limits the amount of space in the bilge to install the foil and provide enough separation between the upper and lower bearings, which enable it to ‘slide’ under load when the Baltic 142 is at speed.

Simon Everest from Gurit said: “We collaborated with Baltic Yachts to make small adjustments to the accommodation and with Farr Yacht Design to alter the hull shape creating a subtle blister around the foil exit.” The blisters provided the width or beam they were looking for.

The foil is controlled using a system of pulleys the lines for which run to a powerful electric captive winch positioned at deck level. To prevent water ingress from the casing, which is permanently flooded, the control lines are led through composite pipes to a point above the waterline.

The actuator or control lines travel to the outer extremities of the foil to a turning block so another challenge was to design a protective channel or groove on the underside of the foil to carry the line. A self-activating lock to prevent the board sliding straight through the casing in the event of the actuator line failing also had to be developed.

America’s Cup research

There are four sets of bearing cassettes, the outboard, upper pair taking the upward loads when the board is deployed and the inner, lower pair dealing with the downward load at the inner end of the board.

A lot of the bearing technology has been provided by the team at Ben Ainslie’s BAR Technologies whose research into friction is literally microscopic in its methodology and benefits from more than two-and-a-half years’ work on America’s Cup boats. What BAR found during that research was that reducing friction to an absolute minimum was paramount.

That might sound obvious, but when the microscopic behaviour of materials such as carbon fibre was studied it was found wanting in certain parts of the design. For instance, the trailing edge of the foil becomes so heavily loaded against the casing aperture when the yacht is sailing at speed, the surface of the carbon fibre foil distorts.

“It’s as if it’s pushing against a little hill of material created temporarily by the loading – in other words it’s constantly ‘going up hill’,” explained Simon Schofield at BAR Technologies. So to reduce the size of ‘the little hill’ and in turn reduce friction, the trailing edge is finished with a much harder material, in this case titanium.

Each case of bearings contains four cassettes made up of 25 Torlon rollers. They are contained in titanium housings that can be adjusted (with the yacht at a standstill) to alter the angle they meet the foil surface. We got some idea of their size when we were told each bearing set on the Baltic 142 weighs 30kg.

The foil itself is being built by French specialist fabricators ISOTOP and comprises a number of carbon fibre spars running the length of the foil that are wrapped and held together with carbon cloth. The foil is designed to deflect through 800mm at each tip and the leading edge is finished with a foam ‘nose’ designed to crush in a collision.

Technoculture

The all-carbon composite Baltic 142 is intended for fast, comfortable global cruising, but her owner hasn’t stopped at foil technology in his quest for innovation. This yacht will be fitted with diesel-electric propulsion and generating system, which burns less fossil fuel, is less space hungry and quieter than a conventional drive train.

Weight is being saved by specifying a 700-volt electrical system that uses lighter cabling and allows equipment normally run on heavy and space hungry hydraulics to be powered by the main battery bank.

The machinery room, housing the remarkably compact 400kW propulsion motor, two 210 kW generators, four banks of Alkasol lithium-ion batteries, watermakers and other ancillary equipment, has been assembled outside the yacht in Baltic Yachts’ Jakobstad facility and was craned into position as a complete module.

There has also been a major effort to improve serviceability so that long periods of independent cruising can be undertaken and maintenance carried out without having to seek out a specialist yachting facility.

With styling and interior design by Lucio Micheletti as well as the in-house team, the Baltic 142 sports a sleek, low deck saloon with a hard, fixed bimini extending over the forward cockpit area. Below, her vast deck saloon, providing panoramic views, forms the focal point of her luxury accommodation.

Unusually, the owner’s suite is located almost amidships, where motion is at its least, with further accommodation for six guests in three cabins. Other features include a Rondal rig with electric in-boom furling, a lifting keel and a propeller leg rotating through 180 degrees.

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Improved Efficiency with Hydro Glide Foil System™

The Aquila Hydro Glide Foil System™, designed by catamaran and foil specialists Morrelli & Melvin Design & Engineering, is available as an option on the extremely popular Aquila 36 Sport  as well as the Aquila 42 Yacht . It enhances the performance, consumption, and handling of the already spectacular performance of these two power catamarans. For the Aquila 36 Sport, the hydro-glide foil improves miles per gallon by 40% when compared to a competitor's 36' power catamaran and decreases the fuel consumption rate by 37%. 

As reviewed by Boating Magazine: “It’s hard to believe that a piece of metal with no moving parts can be the approximate equivalent of adding 200 horsepower, 100 gallons of fuel, and 100 miles of extra range.” But, that’s what happens when the Aquila Hydro Glide Foil System is attached between the two hulls. 

Improved Boat Efficiency | Aquila Hydro Glide Foil System™

An In-Depth Look at the Hydro Glide Foil

How the Hydro Glide Foil Came to Be

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• Hydrofoil Technology

Hysucat technology: planing is fun but foiling is electric

Getting boats to fly above the water surface is simple in theory, but tricky in practice and has challenged designers for over a century. Starting from 1980s some huge advances was made in this direction. Not just for fun or sports, but to gain some day to day functional advantages and enhanced efficiency. The new foiling technology once invented for military usage in 1980 found its way in service boating and RIB tenders used for varied purposes. Since the creation of RIB boats in early 1970s development concentrated on enhancing power capability and materials used. Hard hull slamming, instability and increasing fuel consumption were considered as unbeatable side-effects for long time. Until in the beginning of 1980s when two men in the University of Stellenbosch in South Africa enhanced RIB technology with catamaran hulls and foils. This may sound easy but in reality combining these elements demanded years of try-and-test with dozens pages’ data analysis and engineering searches. Why so serious?

Foiling refers to the use of hydrofoils attached to the hull of fast boats, which provides additional lift at planing speeds – often enough to lift the hull completely clear of the water. Foils work in a similar way to aircraft wings. In simple terms, as they move through the water they deflect the flow, which exerts a force on the foil. If that force is upward, the faster they move, the greater the lift. Foiling may seem like a recent technological phenomenon but it has actually been 100 years in the making. The first development of a foiling water vessel was a 60hp motorboat designed and built by Italian inventor Enrico Forlanini in 1906, obtaining patents in both the UK and the USA. He had a prototype operating on Lake Maggiore soon after. British boat designer John Thornycroft followed up with a series of scale models featuring stepped hulls and a single foil, and by 1909 had a full-scale 22ft prototype running. Later, in 1919, Alexander Graham Bell broke the world marine speed record with his Hydrodrome 4. During WWII, the German military developed a 17-tonne foiling mine layer that was tested in the Baltic at speeds of up to 47 knots. By the early 1950s, the first commercial hydrofoil ferry was running between Italy and Switzerland and a decade later, a private hydrofoil yacht featured in the Bond movie Thunderball.

It wasn’t until the 1960’s and 1970’s that foiling technology was introduced to the military and used commercially with the launch of the Boeing Jetfoil, first serving the Hawaiian Islands and later Hong Kong and Macau. Traditionally, high-speed hydrofoils used large V-shaped foils that jutted out beyond the boat’s beam. This made berthing tricky and increased the draught. They were also costly to construct, vulnerable to damage and difficult to power, as the propellers of conventional shaftdrives would be clear of the water once foiling. Lastly, although hydrofoils were often more efficient than conventional hulls, high-speed cats could usually match the efficiency without the drawbacks. The problem was decreasing stability of catamarans at high speed. These facts served as starting point for further research for speed boat racer Malan Conradie and Professor Gunter Hoppe, a world authority on hydrofoil technology and head of Marine Dynamics at the University of Stellenbosch in South Africa. The idea of development fast, stable and efficient foil-assisted catamaran hull without side-effects fascinated the duo and studies begun.

For 15 years, Conradie had worked with Professor Hoppe. Conradie did the technical design, interior and exterior design work, and Professor Hoppe designed the hydrofoils. All designs were tested the test tank facility at the university and sea trials were carried out to evaluate the hydrofoil concept. At later stage Conradie took the beta-version hull to the offshore powerboat events where it proved its superior design by outperforming the competition.

This collaboration resulted in the birth of the original Hysucat – “Hydrofoil Supported Catamaran ” – which led to a new breed of hull designs that became popular in South Africa and later worldwide. The resulting company took the name of the new concept as its own – Hysucat. There should be noted, that as original patents had expired now large number of hydrofoil-supported cat-hulled vessels (from 6m to 50m in LOA) are using the Hysucat technology without using the original brand. So what exactly is so special about Hysucat? First it is the hull or, to be more specific – hulls consisting of an asymmetrical, planing catamaran hull and special hydrofoil system. The main hydrofoil fitted between the catamaran hulls acts like any classic foil operating in a fluid medium – the top surface generates a low pressure area, the lower surface a high pressure area and the mass of water flowing past the foil is deflected downwards. The resultant is lift generated far more efficiently than the hull planing surfaces – typically the Lift/Drag ratio of a planning hull is 4:1 while that of the hydrofoil is 20:1. The main foil a stainless steel wing in the shape of a chevron, positioned slightly ahead of the boat’s center of gravity that spans the tunnel created by the catamaran hulls. It is parallel with – but not protruding below – the bottom of the hulls, meaning that the wing is always in the water and that there may be some protection for it in case of accidental grounding. There is no doubt that air trapped and compressed in the tunnel at higher speeds will also add to the lift potential before passing through the end of the tunnels at the transom.

Smaller trim hydrofoils are also fitted on the inside of the catamaran tunnel near the transom. These smaller foils play an important role in the automatic longitudinal trim stabilization of the hull in that as they approach the water surface in the catamaran tunnel, the bow trims down, their lift decreases (due to free-surface effects) and then, due to lift reduction, the transom trims back down again. In general, the hydrofoils are protectively fitted between the catamaran hulls as they are fitted to the hull keels as deep as possible so as to keep them fully submerged but no lower than the keels – as they do not protrude below the hull nor are they wider than the tunnel beam, there are no operational or aesthetic constraints as a result of fitting Hysucat hydrofoils. Generally speaking the Hysucat design offers the best features of a monohull and a catamaran combined. While starting to accelerate the foil-assisted boat overcomes its own bow wake easily without engine overpowered effort needed for monohull or average catamaran. This is really important in choppy waters when “normal” cats tend to bury in waves.

The advantages of this unique, hybrid system is that it further amplifies many of the existing benefits of the catamaran hull-form. These are

• Due to catamaran-shaped hulls Hysucat designed boats have reduced running resistance. Therefore, high speeds can be reached much easier with lower-powered engines with up to 70% less fuel consumption. This gives two-folded advantage in terms of cheaper engine set-ups and smaller fuel expenses.

• Consuming less fuel for propulsion, the Hysucat design dramatically broadens the cruising range of the boat. Hysucat can go much further for less time and money.

• Improved ride quality in rough seas due to the motion damping effect of the hydrofoils.

• Easy, monohull-like control. The foils do not impair handling nor create directional-instability or broaching problems. Although sensitive to handle, Hysucat do not need special handling techniques.

• Hysucat foil-assisted boats can reach up to 50-60 mph speeds with 30-35 mph as average cruising. Again such figures are reached with less resources both engine and fuel-wise.

Furthermore, some of the advantages are felt only while riding the Hysucat boat. First effect is low spray noiseless dry ride of the foil-assisted boat. Due to lifting effect and low resistance, there is less slamming and in turn less spray from the bottom of the boat. So there’s no need to overdress the guests and personnel with protective (and expensive) water-proof outfit.

Essential point of difference is load bearing capacity. The forces that are created by foils are working almost regardless of weight. The payload of the Hysucat foil-assisted boat is twice bigger than the average boat. Hysucat is less sensitive to the load distribution as well. Figures prove that 8m Hysucat can easily blast with up to 12 guests onboard.

Again, with less slamming and as a result – less shaking of the vessel come such important feature as no-fatigue effect. This is essential for a pleasant ride for those not familiar with sea or fatigue-vulnerable by nature.

Last but not least, the catamaran-shaped hull provides wider beam and greater storage – precious commodity for the RIBs.

With this some suggestions must be acknowledged. First issue that is always raised is foils prone to impacts. Reported tests and real issues show that normal production foils can survive some object-hitting but not hard grounding on rocky bottom. Serial producers propose break-away setups that help to protect the hulls in case of really severe impacts.

The other point is the complex construction process with extremely tight allowances for foils production. This means thoughtful selection of the producers that deliver the boat able to show the foil-technology in full effect.

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Metal Shark Ferry Builds: NYC Ferry

In July 2016, Metal Shark was selected by HNY Ferry Fleet, LLC (a Hornblower company) to build 88′, Incat Crowther-designed, 150-passenger high-speed ferries for its new NYC Ferry Service. By incorporating the same serialized building processes honed on its military fleet builds, Metal Shark built and delivered the entire six-vessel order in record time. With less than ten months’ time from project start to the delivery of the first vessel, Metal Shark delivered all six ferries on or ahead of schedule, between April and June, 2017. NYC Ferry officially launched on May 1, 2017, with Metal Shark-built H 102 given the honors of ferrying the first load of customers on the new service’s inaugural revenue trip. Metal Shark is proud to count HNY Ferry Fleet, Hornblower, and NYC Ferry among its growing list of satisfied customers. In September 2017, a second order of NYC Ferries was announced . Production of 150-passenger and 350-passenger ferries for NYC Ferry is ongoing.

NYC Ferry Image Gallery

Metal Shark Ferry Builds: Potomac Riverboat Company

In January 2017, Metal Shark was selected by the Potomac Riverboat Company division of Entertainment Cruises to produce four 88’, high speed/low wake, 150-passenger aluminum catamarans for a new Washington DC transit service.The low-wake, low-wash USCG Subchapter T vessels were designed by BMT Designers and Planners and combine passenger comfort with fuel efficiency and low environmental impact. The new vessels provide commuters in the Washington DC metro region with service between Old Town Alexandria, Virginia; National Harbor, Maryland; and Georgetown and The Wharf in Washington DC. Potomac Riverboat Company parent Entertainment Cruises is the nation’s largest dining and sightseeing cruise company, with a fleet of 30 ships operating in over a dozen major U.S. cities. Construction on Potomac Taxi I and II commenced in March 2017, with both vessels finishing in September, approximately six months later. The remaining vessels, Potomac Taxi III and IV, were delivered in February and March 2018.

Potomac Water Taxi Image Gallery

Metal Shark Ferry Builds: New Orleans RTA

In January 2017, Metal Shark was selected by the New Orleans Regional Transit Authority (RTA) to produce two 105-foot, 150-passenger, BMT-designed, aluminum high speed catamaran passenger ferries. These new vessels were designed to bring vastly improved passenger comfort and convenience, operating economy, safety, and environmental friendliness to New Orleans ferry routes, replacing the RTA’s two ferries built in 1977 and 1937. RTA 1 was completed and delivered to New Orleans in July of 2018, with RTA 2 completing in October. The USCG Subchapter “T” compliant ferries are powered by twin 715-horsepower Cat C-18 Tier 3 diesel engines, and as per RTA’s requirements the vessels feature a low wake/low wash, high efficiency hull design for reduced environmental impact. “In the past 18 months, we have delivered over fourteen 150-passenger and 350-passenger ferries to New York, Washington, DC, and now, New Orleans,” said Metal Shark CEO Chris Allard. “As a local Louisiana company, it has been an honor to build these modern, comfortable new vessels for the people of New Orleans and visitors from around the world.”

RTA Ferry Image Gallery

Excursion Vessels

Metal shark excursion vessel builds: hubbard’s marina.

The “Flying Hub II” was a first-in-class foil assisted catamaran hull built by Metal Shark for Hubbard’s Marina, a Florida-based fishing and tour boat operator, and was delivered in August of 2017. Powered by twin 350-HP Yamaha four-stroke outboard engines, the vessel reaches speeds in excess of 35 knots. It is equipped with bench seating for 20+ passengers beneath a large canopy. The Flying Hub II was specifically configured for fishing excursions, nearshore and offshore, snorkeling trips, dolphin watching tours, and water taxi services. Learn more about the Flying Hub II .

20-Passenger Foil Cat Gallery

Metal Shark Excursion Vessel Builds: Pure Florida

The second Jutson-designed foil-assisted catamaran excursion vessel built by Metal Shark, “Sea Flight”, was completed and delivered in August of 2019. Bench seating to accommodate up to 33 passengers is ideal for it’s intended use to offer a wide range of sightseeing, river and sunset cruises, Jet Ski tours and rentals, boat rentals, fishing trips and charters, eco-tours, educational field trips, and private family and corporate cruises. The vessel is powered by twin 440-horsepower Yanmar 6LY440 diesel engines coupled to Hamilton HJ292 water jets via ZF Marine 280-1 transmissions. Sea Flight cruises at speeds in excess of 30 knots and boasts a top speed of 40+ knots. Learn more about the Sea Flight.

33-Passenger Foil Cat Gallery

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[email protected]

Ewell USACE Foil Assisted Catamaran

Key features.

• Length Overall: 61′ 4″
• Breadth: 23′ 11″
• Draft: 3′ 4″
• Displacement: 85,000 LBS
• Max Speed: 32 Knots
• Fuel Capacity: 1,052 Gallons
• Potable Water: 115 Gallons

Foil Assisted Catamaran, 5083-H116 Aluminum Hull, With Stainless Steel Hydrofoils

Machinery, Survey Equipment, and Special Features

• Main Engines: (2) MAN V8-1000 CR, 985HP @ 2300 RPM
• Reduction Gears: (2) ZF 500
• Water Jets: (2) Hamilton HJ 422
• Propulsion Controls: Hamilton Jet MECS Control
• Generators: (2) Kohler 20EKOZD – 20 kW, 120/240V
• Electronics:  Furuno – Radars, NAVnet TZTouch, GPS, AIS
• Crane: Morgan Marine 300.3 Knuckle Boom
• Survey Equipment: Retractable Multi-Beam Survey Strut

Green Features

• Intersleek 900 Bottom Paint
• LED House / Navigation Lighting
• Tier III compliant main propulsion engines

Accommodations

• Galley, head, 2 single bunks

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Professional BoatBuilder Magazine

Foil-assisted guide boat.

By Dieter Loibner , Aug 7, 2020

This 31′ foil-assisted aluminum catamaran was designed by Jutson Marine Design and built by ACI Boats of Port Townsend, Washington. Aside from good seakeeping, the boat also can access shallow-water landing spots, allowing passengers to step ashore via a fold-down ramp.

Designer Scott Jutson checked in with us from New Zealand as he was waiting to board one of the last flights back to Vancouver, Canada, to ride out the coronavirus pandemic. He reported that sea trials just finished for a new design built by ACI in Port Townsend, Washington: a 31 ‘ foil-assisted aluminum catamaran with an asymmetrical hull shape for the Alaska guide market.

“The hullform represents a new development for us and the builder, and it really works,” Jutson said. “The client’s brief was for remote operations by an Alaskan guide for fishing and hunting. Distances traveled (in a relatively small boat) require excellent seakeeping, speed, and fuel economy. Longest run requires a steady 35-knot cruise. The boat is powered by two Suzuki 350 DPs with 22.5 “ [57.15cm] props and has a fuel capacity of 300 gal [1,136 l] in two tanks. Performance at full load [7,500 lbs/7.9 t] sees a top speed of 44 knots and an optimal cruise of 35.8 knots at 4,650 rpm with a range of 1.39 nm/gal.”

Jutson, whom we portrayed in 2014 , also emphasized the design of a new hullform that features an extended waterline to a plumb stem and a semi-symmetric bow shape for rough water stability. The foils go across the tunnel’s full beam without center struts and are designed to be load and trim tolerant so the performance delta between light and full load is relatively small. Construction is welded aluminum plate using 5086 grade for high-load areas (bottom and frames) for maximum strength and minimal weight.

Modified asymmetrical hulls and foil assist help the vessel perform in rough conditions, averaging 1.5 nm per gallon at 30 knots during tests with 2x 350-hp Suzuki DP outboards.

“We are very familiar with this size catamaran,” said builder Cory Armstrong. “In fact, the 30 by 11 [footer] is our most popular model.” ACI’s symmetrical planing cats achieve about 1 nm/gal over 30 knots, Armstrong added. For the new Jutson design with the Hysucat foil configuration (for more on this type, see Gunther Migeotte’s “Hydrofoil-Supported Catamarans,” PBB No. 157 , page 68) the target was a 25% improvement in fuel economy and a 50% or more reduction of vertical accelerations. Armstrong said, “We ran several trials from light to fully loaded conditions, and in all cases we achieved better than 1.3 nm/gal up to 35 knots, and at 30 knots of cruising speed the boat was in the range of 1.5 nm/gal. Most notable was the seakeeping, particularly in mixed chop [when] we ran 30 knots in some pretty nasty stuff. I was extremely pleased with the added benefit of foils in conjunction with the modified asymmetrical hull in her ability to handle rough seas while maintaining excellent fuel economy.”

Scott Jutson, 275 West 18th Ave., Vancouver, V5Y 2A8, BC, Canada; tel. 604–760–2549.

Armstrong Consolidated, LLC, 2900 Washington St., Port Townsend, WA 98368 USA, tel. 360–385–1203.

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NEW BUILD - 11m Foil Assisted Power Cat

This is a semi-asymmetrical, foil assisted catamaran  designed to offer economical cruising speeds of 24 -26 knots with twin 300hp outboards with up to 24 passengers on board.

Designed by Noah Thompson (NZ), the boat is available in a variety of layouts to better address the needs of dive and tour operators. Foil-assistance permits a higher level of comfort and lower fuel consumption.  

The NXT 35 SP is slightly bigger than the 35 DC but has similar characteristics : seaworthy hull, huge cockpit area, economy of operation and maintenance free construction.

This powercat workboat is ideal for small resort owners, passenger runs, dive operations, and surf charters. With several units already delivered and in service in various parts of the world, the NXT 35 SP is characterized by excellent performance and good load carrying capacity.

She is ideally suited for  the Mediterranean or tropical climates with open or enclosed sides, drop down clear screens and a layout fully customizable.

The main characteristics of this powerful and compact commercial catamaran are :

Total length 10.9m

Very strong aluminum construction

Outboard (gas or diesel) twin 300 hp and up.

Speed 35+ knots

16 to 24 pax capacity

The catamaran is available in a variety of configurations and can be customized to meet an operator’s exact requirements.  The hull is standard but the cockpit layout can be easily modified and is basically designed in cooperation with the operator.

Options include :

Luggage room

Small crew cabin with one double berth

Dive ladder

Surfboard rack

The details of all vessels are offered in good faith but we cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. Any buyer should instruct their agents, or their surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to sale, price change, location or withdrawal without notice.

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Stability | Sea-Keeping | Efficiency | Endurance

Advancing marine technology through research & development, partnership and collaboration.

FASTcc specialises on projects for the US and International Governments, Workboat and Ferry Operators and Private Yachts and Sports Boats which are high-speed craft.

By teaming up with us, you can ensure that the most up-to-date technology is implemented while you can stay focused on adding your distinctive competence to your projects and letting us focus on our speciality. Our consulting team has a long-standing, proven track-record in the categories under our “platforms” section.

Please browse to our services page for more details on working with us and what we can offer.

Please contact us on one of the below addresses should you require more information or want to start a conversation about one of the following:

Partnering & Collaboration – [email protected] New Vessel – [email protected] Retrofit – [email protected] Technical Inquiry – [email protected] Public Relations & Press – [email protected]

Learn about our company

Over the past four decades, our firm has been actively involved in the research and development of various technologies that are pushing the boundaries in marine technology for high speed vessels of all sizes. As hydrofoil-assistance gains momentum throughout the world, it is crucial for naval architects, designers and manufacturers to incorporate the latest technology into their applications. We team with your designers and engineers so that together we can build the best-in-class design to ensure the highest performance and reliability which is crucial for a successful project.

Please read more about our company on the “Our Company” page.

We encourage you to explore our website, specifically the various platform sections and their relevant applications to gain an understanding of how Hysucraft TM can help your unique application. Visit our services page for more details on what we offer, view our our company page to see who we are and what our values are. When you are ready to develop your next project that will push the human race forward, please contact us through our contact us page.

What to expect with Hysucraft

Sea-keeping, videos & latest news.

Safehaven is very pleased with the performance and especially the effect of the hydrofoil. The craft achieved 45kts which is a good result. She came onto the plane very easily with no hump, and only needing 40% of engine load in transition. Seakeeping seems very impressive.

ThunderChild II second offshore world speed record, Ireland to Iceland

On the 19th of July 2021, ThunderChild II established a second Offshore World-Speed-Record from Killybegs, Ireland to Rejkaviks, Iceland. Please see ThunderChild II at Iceland after 866 nautical miles with …

International Offshore World Speed Record

ThunderChild II and ThunderChild III was designed by Frank Kowalski and built by Safehaven Marine in Cork, Ireland. FASTcc designed a Hysucraft foil system consisting of a mainfoil slightly forward …

Recent videos of the Safehaven Marine Thunder Child II

The following videos shows Thunder Child II, with a Hysucraft foil system, which is a contender for a North Atlantic record run. The videos show trial runs and exhibits of …

Safehaven Marine launches Thunder Child III

Frank Kowalski of Safehaven Marine contacted FASTcc to investigate hydrofoil assistance on their Thunder Child crafts. FASTcc proposed to develop an optimised Hysucraft foil system consisting of a main foil …

USACE Damrell Christening

A third USACE Survey Boat was developed by FASTcc and Technology Associates incorporated as a typical Hysucraft and named DAMRELL. It is slightly larger than the latest 2 USACE Survey …

USACE Survey Vessel EWELL Launched

The USACE Survey Vessel EWELL, owned and operated by the US Army Corps of Engineers (USACE) Norfolk District, was commissioned in January of 2018. Its construction was managed by the …

FASTCC & Jutson Designed 44′ x 14′ Foil Assist Asymmetrical Catamaran

The vessel has twin inboard 440 hp Yanmar Diesel driven jet propulsion. Transport Canada Approved 35 Passenger Tour Vessel! View a video taken from ACI’s autonomous drone of the vessel.

Technology Associates (TAI) and FASTcc delivers US Army Corps survey vessel

Photo: USACE Website Technology Associates Inc. (TAI) and Aluma Marine and Fabrication LLC, Harvey, La., have delivered the 61’4″x23’11” Catlett to the U.S. Army Corps of Engineers in Baltimore. Read …

New Eco Tour Foil Cat For Vancouver

Building on a very positive season Vancouver whale watching operator Wild Whales has commissioned a second foil assist catamaran for their Granville Island based operations. Passenger comfort and fuel efficient …

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