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Power Catamarans: A Complete Guide

Dec 06, 2023

less than a min

Power Catamarans, often termed as the epitome of modern maritime engineering, are gaining popularity for all the right reasons. Their distinct design, enhanced stability, and cruising efficiency set them apart from traditional monohull boats and even their sail-driven counterparts. This guide dives into the world of Power Catamarans, shedding light on their advantages and how they compare to other vessels like monohulls and trimarans.

Historical Prelude:

The concept of catamarans traces its roots back to ancient maritime cultures. However, the power catamaran is a relatively modern innovation that marries the traditional twin-hull design with powerful engines, offering a unique blend of speed, stability, and space.

Distinguishing Design:

Power Catamarans are characterized by their twin hulls, which significantly reduce the drag, thus enhancing speed and fuel efficiency. Unlike monohulls, they have a broader beam, which contributes to increased stability and more living space. The absence of a ballast for stability further lightens the vessel, contributing to its speed and fuel economy

Speed and Handling:

One of the significant advantages of power catamarans is their speed and handling. The twin hulls allow for a smoother glide over the water, making them particularly favorable for watersports enthusiasts. Their handling in rough waters is superior to monohulls, thanks to the inherent stability provided by the dual-hull design.

The stability of power catamarans is unparalleled, especially when compared to monohulls. The wide beam and twin hulls provide a stable platform, reducing the rocking and rolling common in monohulls. This stability is not only comforting in rough seas but also crucial when docking or anchoring.

Comfort and Space:

The spacious design of power catamarans offers homelike livability, with ample room for cabins, lounges, and even onboard amenities like grills and bars. The wide beam also allows for large deck spaces, ideal for sunbathing or enjoying the scenic ocean vistas.

Economy and Redundancy:

Power catamarans are economical, with fuel efficiency being one of their selling points. The redundancy built into their design, with separate engines for each hull, provides an added layer of safety, ensuring that the vessel can return to shore even if one engine fails.

Regular Upkeep and Care:

Power catamarans, given their unique design and structure, come with their own set of maintenance requirements. Like all boats, routine checks and upkeep are essential to ensure smooth sailing. The twin hull design means double the underwater gear – from propellers to rudders, which necessitates regular inspections for any signs of wear, tear, or fouling.

Antifouling:

Given that power catamarans have a larger surface area underwater due to their twin hulls, they may be more susceptible to marine growth. Regular antifouling treatments can help in keeping the hulls clean, ensuring optimal performance and fuel efficiency.

Engine Maintenance:

One distinct advantage of power catamarans is their dual-engine setup, but this also means double the engine maintenance. Regular oil changes, cooling system checks, and filter replacements are crucial. It's beneficial to synchronize maintenance schedules for both engines to ensure consistent performance.

The lifespan of a power catamaran largely depends on its build quality, materials used, and how well it's maintained. With proper care, a power catamaran can last for several decades. The engine's maintenance significantly impacts the catamaran's lifespan, with gasoline engines requiring maintenance at 1,200 to 1,800 hours and diesel engines at around 5,000 hours​​. The construction materials play a crucial role; for instance, fiberglass catamarans, when well-maintained, can last for many decades, while aluminum cats might change ownership after 10-15 years but can last a lifetime with proper care​.

World-Renowned Builders:

The power catamaran sector boasts several reputable manufacturers such as Lagoon, Leopard Catamarans, Fountaine Pajot, and other notable names like Seawind Catamarans​.

Lagoon, a revered name under the Beneteau Group umbrella, has carved its niche in crafting luxurious, spacious catamarans. A prime example is the Lagoon 630 Motor Yacht, embodying opulence with its nearly 250 sq. ft. aft deck and 900 sq. ft. interior, comfortably housing up to 12 guests. Known for its superyacht styling, it boasts superior fuel efficiency and a commendable average velocity-made-good of 9 knots.

Leopard Catamarans:

Emerging from the reputable Robertson and Caine shipyard in South Africa, Leopard Catamarans is synonymous with innovation and efficiency. The Leopard 53 Powercat is a testament to this legacy, showcasing excellent seakeeping abilities, offering 3 or 4 cabin configurations, and achieving a top speed of 25 knots.

Fountaine Pajot:

A trailblazer since 1976, Fountaine Pajot constantly redefines catamaran design. The Fountaine Pajot MY6 is a shining example, encapsulating the brand's visionary ethos. Stretching 15 meters, the MY6, equipped with dual engines of up to 2 x 353 Kw and 2 x 480 hp, promises dynamic sailing. Crafted meticulously by Pier Angelo Andreani, the interior mirrors a 20-meter monohull's spaciousness, reflecting modern aesthetics and comfort that stand as a benchmark in the Motor Yacht world.

These manufacturers continue to innovate, offering a blend of luxury, performance, and efficiency in their power catamaran models, making them a popular choice among maritime enthusiasts.

Comparing with Monohulls and Trimarans:

While monohulls are traditional and often cheaper, they lack the stability and space offered by power catamarans. On the other hand, trimarans, with three hulls, provide even more stability but at the cost of additional drag and less interior space.

TheBoatDB - Your Gateway to Maritime Exploration:

If you’re looking to delve deeper into the world of power catamarans and other vessels, TheBoatDB offers a comprehensive boat database. Explore various catamaran models, compare them with monohulls, trimarans, and other types of boats, and make an informed decision on your next maritime adventure.

In summary, power catamarans encapsulate a modern engineering marvel in the maritime domain. Their blend of speed, stability, comfort, and economy makes them an attractive option for a broad spectrum of boaters. Whether you are a long-distance cruiser, a water sport enthusiast, or someone who cherishes the tranquility of the sea, a power catamaran could be the vessel that transforms your maritime adventures into unforgettable experiences.

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Reviewed: Lagoon Sixty 7 Powercat

• By Phil Draper
• Updated: August 10, 2020

Oftentimes, powercats end up looking like wedding cakes. They start wide at the base and narrow with each successive level. Making them look good is a real challenge.

All credit, then, to Lagoon’s regular preferred creative partners, automotive-design legend Patrick Le Quément and VPLP, which respectively take the bows for exterior design and naval architecture on the Lagoon Sixty 7. It’s a catamaran that manages to unite elegance and functionality.

The Sixty 7 and its sailing sistership, the Sixty 5, replace the outgoing Lagoon 630 Motor Yacht and Lagoon 620. Around 80 of the 630s were built from 2012 through this past January, and around 170 of the 620s were delivered in the 10 years since its 2009 debut.

Usable space is the key evolution from old models to new. Lagoon says the new-generation cat designs deliver around 30 percent more floor area inside and outside. The flybridge alone adds about 40 square feet or so of alfresco lounge space below a hardtop with a sunroof. But check out the foredeck: A seating area connects to the salon via a 12-millimeter-thick glass door, making the forward end of the yacht an integral part of the living area.

A two-person sofa is just outside the salon door, and up three steps is an open deck for movable furniture, beanbag chairs and the like. Lagoon has an exclusive range of stand-alone items from the Belgian outdoor-furniture company Tribù, which is responsible for most of the other furniture aboard. And if music’s your thing, then make sure to tick the box for the optional Waterfall Audio sound system; the clarity is unbelievable.

Given the yacht’s volume, the Sixty 7 is surprisingly nimble in turns, and the driving ergonomics couldn’t be much better at the main console in the salon or up on the flybridge. The displays are all from Simrad. A leaning post is standard at the lower helm, and a seat is optional.

The biggest difference between the power and sail versions of this yacht are the diesels and fuel tanks. The sail version has twin 150 hp Volvo Penta D3s. The powercat has more than twice the oomph: either twin 340 hp Volvo Penta D6s or twin 440 hp Yanmar 6LYs. Cat buyers—whether opting for rigs or no rigs—mostly choose the most powerful engine option.

With the Yanmar diesels, 32 percent fuel, 40 percent water and nine people aboard, the Sixty 7 we ran in the Mediterranean topped 21 knots flat out, which means 3,350 rpm and a total fuel burn of almost 48 gph, or 30 hours’ worth of run time. Acceleration from rest to top speed took around 35 seconds. Not bad numbers for something moving through the water with space comparable to a $5 million, 3,000-square-foot Manhattan apartment.

Slow the yacht to a constant 2,000 rpm and 12 knots, and allowing for a 10 percent reserve, owners can plan on 1,200 nautical miles between fuel pumps. Speed up to a 14-knot fast cruise, and that range gets cut in half. Fuel capacity on the powercat version is 1,452 gallons across four tanks, two in each hull.

Generated from a three-piece mold tool, the Sixty 7′s hulls are slightly longer and flatter aft than those on the sail version because the extra weight of engines and fuel adds approximately 18,300 pounds to the yacht’s displacement. The Sixty 7 powercat draws less too: just 3 feet, 10 inches.

Nauta Design handled interiors. Three principal veneer choices are available: walnut, light oak and gray oak. Accommodations options are modular. Combinations from four to six staterooms are possible, although one sleeping space would normally be specified for crew.

The Lagoon Sixty 7 I got aboard had four double-berth staterooms, including a master in the after half of the starboard hull with a sofa, separate shower and head stalls, and a private entrance aft. The galley and crew mess were in the after half of the port hull. There’s also the option of a galley at main-deck level, but the first four Sixty 7s were sold with the galley down; the fifth will get the galley-up layout.

The Lagoon Sixty 7 has visual appeal, the volume of a house, and the range to cruise the Eastern Seaboard almost nonstop with accommodations for a large cruising family. Sometimes, you can have your cake and eat it too.

Take the next step: cata-lagoon.com

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Powercat Fuel Consumption Comparisons

by Malcolm Tennant Multihull Design LTD

Frequently in magazines and on web sites you will find claims of  ‘greater speeds’, ‘lower fuel consumption’, ‘longer range’ for a particular design. Here at Malcolm Tennant Design Ltd, we pride ourselves at producing fuel efficient powerboats which give high speeds on displacement hulls with as low as possible horsepower requirements. Our efficient hulls allow for longer ranges with a given amount of fuel. To make sure we are delivering the best possible performance to our customers, when possible, we like to compare our hull performance data with other boats as a validation of our design ethos.  When fuel consumption tests are published, it allows everybody to look beyond the advertising blurb and estimated performance figures and get down to what a boat is really achieving.

We recently had the 13.6m Escape launched here in New Zealand and had a fuel test completed on her. We managed to find two other published fuel tests for recently launched (2003) vessels of comparable designs. These other two boats have been designed by reputable designers that are competent in designing power multihulls.

The other results are for a round bottomed with chine semi-displacement powercat and a hard chine planing powercat. The fuel consumption was matched to the displacements of the vessels so that the slightly heavier planing cat would not be penalized. Our vessel, the Escape, is a full displacement hull that is Malcolm Tennant’s signature powerboat hull form.

The results are shown in the following graph. Right across the fuel range the Escape was using less fuel than either of her competitors. Her closest rival below 19 knots was the semi-displacement powercat. However, as can be seen from the graph above 10 knots, the Escape is using on average only 65% of the fuel of the semi-displacement vessel! Even below 10 knots the Escape is only burning 60% of the semi’s fuel. This means more than 40% more range for the Escape at a given speed.

At all speeds compared, the planing cat was using more fuel than the Escape. At the planing cat’s drag hump at around 11 knots the Escape was using only 43% of the horsepower of the other boat! Above this speed the other boat gets onto the plane and her fuel consumption begins to drop until 18 knots where it begins to rise once more. At the top speed the Escape reached with her 200 Hp motors of 23 knots she is burning only 90% of the fuel of the planing cat. The planing cat then uses an additional 480 HP (total) for another 6.5 knots of speed! So unless very high speeds are required in a boat of this length, the displacement cat is superior.

This figure also shows the second advantage of the displacement cat in that the speed can be reduced to a slower cruise speed for a greatly increased range. If we look at 15 knots for example, the Escape is only using 50% of the fuel of the planing vessel. For a given amount of fuel this equates to twice the range! To increase her range, the planing cat could increase her speed to 18 knots. At this point she would still only have 55% the range of the Escape. The other option for the planing cat would be to reduce her speed to 8 knots to achieve the same range as the Escape achieves at 15 knots. At 15 knots the Escape has a range of 616 nm (with 10 % reserve) and she would cover this distance in 41 hours. The planing cat would take 77 hours to complete this trip. This means she would arrive 1.5 days later! On a return trip cruise you would lose three days out of your holiday just to passage making!

This has confirmed for us that our displacement powercat hull form is the ideal cruising power boat,  capable of both high top speeds and extended cruising ranges that cannot be matched by the other conventional hull forms compared here.  To the owner, this equates to lower fuel cost and more time spent on holiday and less time passage making, which should keep everybody happy!

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Cruising on a Power Multihull

Cruising multihulls have the reputation of being fuel efficient compared to equivalent single hull units. Having two or three hulls rather than one would seem to be an intrinsic advantage... but in these times of uncertainty regarding diesel and gasoline prices and above all of ecological awareness, the need to further reduce consumption is becoming increasingly urgent. How can you achieve this when your engines often exceed 300 HP? What are the best ways to go about it? In this article, we give you some tips on how to reduce the time you spend at the pump.

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Published 28/10/2022

By Norbert Conchin

Issue: SP19

Published: dec. / jan. 2023

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Issue #: SP19

Published: December / January 2023

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The Power Multihull sector has experienced a remarkable boom in recent years - few sectors in the boating industry can boast double-digit growth. In this buyer’s guide - which has become a special motor issue over the past two years - no less than 120 models are presented. Out of all these 15 to 100-foot power multihulls, almost all of which are habitable (we have deliberately stopped at 100 feet), the category we have chosen for this issue is the 40 to 50 footers. These models already have most of the attributes for a successful summer or long-distance cruise. Charter companies like Sunsail/The Moorings operate powercats from 43 (soon to be 40) to 53 feet. In this issue’s buyer’s guide, the seventeen 40 - 50 foot power multihulls are all catamarans equipped with two engines whose power ranges from... 90 to 860 HP. By filtering out the most extreme engines (including outboards), we arrive at a convergence of between 250 and 400 HP inboard. We will use this order of power as a benchmark to help us understand how to limit fuel consumption under way.

Two hulls are better than one!

These benefits begin, as we mentioned above, with powercats having a much more frugal appetite than their monohull counterparts. When under way, the drag of two thin hulls is much lower than that of a single wide hull, and this leads to much lower fuel consumption. If we compare a powercat with a boat of the same volume, the evidence is conclusive. Prestige Yachts, which recently arrived on the power catamaran market, would not disagree. The Prestige 590F burns about 30% more diesel than the brand new M48, which requires just 12 gal (45 l)/h at 10 knots and 20 gal (75 l)/h at 14 knots. Yet the powercat has a similar livability despite being 11 feet shorter. It should be noted that the M48 manages with two 320 HP engines while her big sistership requires two 600 HP units. However, the monohull has an advantage when it comes to its top speed - it can reach nearly 30 knots, while the M48 will not go faster than 20 knots. Also worthy of note is that while in the past, a top speed of more than 20 knots was a determining factor in the purchasing decision of boatowners, this trend is rapidly disappearing. For the first models of our target category, the advantage in terms of consumption in favor of powercats remains. If we look at a Sedan version with minimal windage like the Fountaine Pajot MY4.S, the two 250 HP engines consume 6.6 gal (25 l)/h at 11 knots while the Bavaria E40 trawler, with its 2 x 300 HP, burns 8.7 gal (33 l)/h at the same speed. At 15 knots, once the schedule is set, the on-board instrumentation will show respectively 10.6 gal (40 l) and 13.2 gal (50 l)/h - that is to say a 20% fuel saving for the catamaran, which is considerably more welcoming for its passengers. Let’s close this comparison between powercat and monohull with a brief incursion into the top of the range, well beyond our 40-50 feet. On board a Fountaine Pajot 67 Power equipped with a ...

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I have a new Fountaine Pajot MY6 with Volvo IPS 650 motors being delivered to the BVI in February 2023. I am wondering why (and if) the incredibly efficient Sharrow propeller will ever be available for this boat. See https://boattest.com/Sharrow-Propeller. If the tests are correct, as they appear to be, then this will be a great step forward to better fuel efficiency.

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A Guide to Power Catamaran Boats

If you’re into offshore fishing or water sports, the Power Catamaran or “multi-hull powerboat” offers you a great option for your first vessel. These powerboats provide you an excellent combination of performance, stability, and maneuverability.

These boats have a catamaran design, relying on two hulls to float the vessel instead of the typical deep-V hull found on other powerboat models. The multi-hull powerboat is ideal for cruising, and you can set it up for fishing or watersports as well.

With the multi-hull powerboat, you get options for multiple fishing stations over each hull without disrupting the boat’s balance on the water. They are ideal for use in lakes and estuaries, and they excel on the open ocean.

These boats come in lengths ranging from 16 to 30-feet, with plenty of customizable options and accessories. Typically, you get a stern-drive or outboard motor configuration, with center consoles for the driver and loads of storage space onboard.

These boats can carry from six to eight passengers easily, and most models will fit on trailers. This post gives you all the information you need on selecting the right multi-hull powerboat to suit your aquatic needs.

What Is a Multi-Hull Powerboat?

The multi-hull powerboat features a catamaran design, with two hulls running down the boat’s length, featuring a gap between the two. This configuration makes the boat exceptionally stable at higher speeds, allowing fast movement through choppy water inshore or offshore.

The catamaran might seem like a niche boat design. However, it offers you several advantages on the water, such as a smooth ride, stability, and economy. These boats come in a wide range of designs and lengths, with the smallest versions measuring around 12-feet, and the largest extending up to 70-feet or longer.

The longer vessels come with liveaboard facilities and all the amenities you need to spend days out on the water. We like to think of the multi-hull powerboat as the catamaran design of the cabin cruiser or cuddy cabin boat. You get all the same advantages as these models but with an added performance on the water.

You get plenty of options for live wells, rod holders, gear storage, and integrated coolers for drinks and fish. Whether you’re planning a weekend trip or just going out for the day, the multi-hull powerboat is a great choice for your ocean-going excursion.

While the catamaran model is the most popular choice in this category, there are models featuring a tri-hull design. Typically, these vessels cater more towards fishing than performance or watersports, offering slightly less steering maneuverability than the dual hull setup. However, the addition of the third hull brings superior stability to the boat, making them ideal for fishing in choppy water or cruising from island to island on rougher seas.

The ripple hull models typically feature more liveaboard space, with some models having multiple separate living areas beneath the deck.

Benefits of Multi-Hull Powerboats

The Multi-hull powerboat offers you plenty of advantages for fishing, cruising, and watersports. Here are our top reasons for adding this boat to your shortlist of considerations.

Speed and Handling

The multi-hull boat relies on two separate hulls contacting the water. As a result, there is less drag from the hull when cutting through the water. You get faster speeds than you do with a mono-hull design and excellent handling with tight turning circles. These boats do well on open water, allowing for superior stability in rough waters when fishing offshore.

Dynamic Cruising

The multi-hull powerboat features dynamic cruising capability. These boats are most popular with recreational users that want to cruise down the coastline on the weekend or take a few days out on the water for a fishing trip. The built-in accommodations in many designs make it suitable for staying out on the water overnight.

Stability and Performance

Multi-hull powerboats can come with several engine configurations. The motors on these boats offer excellent performance, propelling the watercraft up to speeds of 50 to 80-mph, depending on the model. They also make suitable watersports boats, allowing for skiing and wakeboarding.

Plenty of Storage

The multi-hull boat offers you more storage capability than mono-hull models. You get loads of storage room above and below deck for your dive gear or fishing equipment. There is under-seat storage, and the v-berths in the bow of these models can include plenty of amenities.

Center Console Design

The center console driver configuration is common with the multi-hull performance boat. This driver position gives you more control over the vessel when turning. Some consoles may position closer to the bow or aft of the boat, depending on the length and design features of the boat.

Hardtop Designs

Most multi-hull powerboats come equipped for long ocean-going trips. As a result, they may have a covered driver cockpit leading to below deck accommodations or storage facilities. Some models have wraparound cockpits with doors sealing the cabin, allowing for air conditioning inside the boat on hot days. Other models come with an open plan design and a hard roof.

Trailerable

Most models of multi-hull power bats range from 16 to 24-feet, but there are plenty of longer models. The shorter lengths are easy to trailer, allowing for easy removal for the water and transportation. However, some models may be wider than 10-feet, requiring a special license to operate the loaded trailer. Check with your local authorities for trailer regulations and laws.

Fishing and Watersports Capability

These boats are excellent fishing vessels, offering you plenty of stability for casting on any side of the boat. The center console design means you have walkways on either side of the console, allowing the angler to chase the fish around the boat if it decides to drag the line. Most models also feature setups for watersports like wakeboarding, with T-tower bars or Bimini tops for higher tow points.

Outboard or Stern Motors

The multi-hull powerboat comes with a design for performance out on the water. As a result, these boats usually feature outboard motors with capacities ranging from 150-HP to 450-HP. Some models may use dual-motor setups or stern-mounted motors that hide out of sight.

Multiple Sizing Options

As mentioned, the multi-hull boat comes in a variety of lengths to suit your requirements. Whether you need a large boat for spending days out on the water or a simple day fishing vessel, there’s a multi-hull design to suit your requirements.

Disadvantages of Multi-Hull Powerboats

While the multi-hull powerboat is a flexible design suited for cruising, fishing, or water sports, it does come with a few drawbacks.

Large Engines and More Fuel

These boats feature design and construction for speed, with large outboard motors. As a result, they are somewhat heavy on fuel, especially with a large-capacity dual-motor setup.

Top Multi-Hull Powerboat Models

You have plenty of choices when selecting your multi-hull powerboat. Here are some of our top picks for the best models available.

Calcutta 480

This multi-hull powerboat has a 51-foot length, and it’s ideal for offshore use, providing exceptional stability thanks to the size and the 17-foot beam. It’s one of the largest models available, featuring world-class multi-hull design.

You get a spacious deck with a center console configuration and enough room to walk down either side of the boat when fishing. The dual hull provides exceptional stability combined with the long length, and you get options for diesel-powered or gasoline engines in outboard or in-stern setup to suit your requirements.

The Calcutta brand custom-builds boats for its clients. You get options for fully enclosed bow areas and fishing-style cabins with a roomy helm deck and a sleeping berth included in the bow. You also have an enclosed head for ablutions, but there is no option for a shower.

This model comes with an enclosed cockpit and air conditioning to keep you cool when cruising. The motors on this boat are monsters, featuring a twin setup of 550-HP Cummins diesel inboards available on the sports version for superior power and speed on the water while maintaining the boat’s maneuverability.

There’s a 600-gallon fuel capacity for the thirsty engines, allowing you to spend days out on the water without running out of fuel.

Insetta 35 IFC Hydrofoil

The Insetta 35 IFC hydrofoil offers you the smooth-sailing benefit of hydrofoils, with premium multi-hull designs. The hydrofoil system generates the lift under the hull, allowing for superior, stable sailing in rough water conditions.

The hydrofoil reduces friction and dragging on the hulls, reducing your fuel consumption by as much as 40% compared to other models with a similar dual hull design. The foil fits between the sponsons, featuring design and construction with stainless steel.

Another interesting design feature with this model is the way the inboard motors have positioning towards each other. This configuration allows for maximum thrust for the propellors on the asymmetrical multi-hull.

The foil and motor setup design also allow for much tighter turns than you get with other multi-hull models, giving you similar performance to what you expect in a mono-hull design.

The boat comes with a large coffin box with 156-gallons of space available and an insulated finish. You get eight rod-holders positioned in the bow and aft of the boat. You also get dual 30-gallon transom live wells and an option for a third below the mezzanine seat.

The Insetta 35 IFC hydrofoil comes with a three-pump sea chest, a folding bait station, and plenty of tackle storage. The boat gets its power and performance from dual Mercury 400 Verados, with the vessel topping out at speeds of 58-mph on open, calm waters.

Invincible 46 Cat

This model is the largest in the Invincible range, and it’s a great choice for offshore fishing. This flagship model comes with a 42-foot length and a center console design for easy driver operation. This multi-hull powerboat relies on a hybrid semi-asymmetrical multi-hull giving it great turning capability and maneuverability out on the open water.

The Invincible 46 Cat features a stepped hull with fast acceleration and plenty of lift. You get a quad engine setup with Mercury 450 Racing outboard motors, and the craft can reach a top-end speed of 78-mph. Other notable features of this boat include a vacuum-infused hull and grid-stringer system for an “invincible” boat that’s virtually unsinkable.

Bali Catspace

If you’re looking for a luxury powercat model, the Bali Catspace Motoryacht is a fantastic – but expensive choice. This model features a design from legendary boat maker Olivier Poncin. This model is a natural cruiser and ideal for the longest ocean-going trips.

The dual hull and high ride height from the water provide exceptional stability for the boat, even in the roughest offshore and coastal waters. The boat comes with a lounge on the deck, and there’s plenty of room around the center console cabin to walk the length of the boat on either side of the vessel. The top level of the boat features the captain’s station and wheelhouse, with luxury living quarters underneath.

You get a huge lounge and a v-berth with sleeping quarters for spending the night out on the water. The cockpit presents the captain with a 360-degree view of the water, and the high riding position gives you a view of the ocean that extends for miles.

The boat comes with all the amenities you need, including tables, a full kitchenette, and luxury sleeping accommodations. There are plenty of entertainment options for TVs and stereo systems down below, with an optional hardtop Bimini.

The Bali Catspace Motoryacht receives its power from a single or dual engine setup featuring 150-HP or 250-HP Yamaha motors.

Wrapping Up

With so much variety available in multi-hull powerboats, you have options for any activity out on the water. These boats are more common in coastal waters, and they make excellent fishing vessels.

Decide on the model that suits your activity, as most have a purpose-built design for fishing, watersports, or cruising. There are plenty of customization options, so make sure you keep a budget in mind as the additions can cost more than 20% of the boat’s initial sticker price, increasing your costs.

John is an experienced journalist and veteran boater. He heads up the content team at BoatingBeast and aims to share his many years experience of the marine world with our readers.

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The Planing Power Catamaran: A Different Kind Of Cat

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Planing powercats deliver the high speeds dayboaters and weekend anglers crave — but without so much pounding in choppy seas.

The air cushion ­created between the two hulls dramatically reduces wave impact at running speeds. (Photo: World Cat)

Powercats are different beasts than sailing cats, and the powercats you're most likely to see on your local waters are those in the 20- to 40-foot range (like my 22-foot Glacier Bay). Unlike the big cruising powercats, which are more like cat trawlers with top ends maybe a little over 20 mph, smaller cats have planing hulls that perform much like today's modern powerboats.

Depending on the engine package, there are a few cats that top out in the lower 30s, lots in the lower 40s, some in the 50s, and a few that break 70 or even 80 mph.

While a similar length monohull may have a 40-mph cruising speed in a 2-foot chop, the monohull captain will pull back the throttles and cruise at 30 to avoid being beaten up. The cat guy, on the other hand, may be able to keep on doing 40 thanks to the smoother ride. But having two hulls underfoot does create some interesting similarities in how these different types of boats react to input from the helm. So you'll see a few of the tips here mirror those used for sailing or cruising catamarans. Whatever type of cat you may be captaining, remember the following:

• Center the wheel and use only the throttles to control the boat. Powercats have their engines exceptionally widely spaced apart, and are far more responsive than monohulls when steered via throttles. Generally speaking, turning the steering wheel will only serve to reduce the effectiveness of working the throttles. This, of course, is assuming you have two engines. There are a few rare cats with one engine.
• At identical rpm, the engine in forward will create more thrust than the engine in reverse. So even if the throttles are set evenly when opposed, the boat will likely slide forward a bit as opposed to spinning in its own length. As a result, when attempting to speed up the maneuver it's usually best to favor giving the reversed engine extra oomph as opposed to the one in forward (assuming you don't want to move forward while turning the boat).
• Check the speed and direction of the wind before docking , and remember that some cats, particularly those with low draft, can be blown around more easily than many monohulls as there may be less hull below the waterline.
• When docking in a new slip for the first time with lines that haven't been preset, bear in mind that once you're docked, securing the boat can be difficult in some situations because few powercats have centered cleats. Most will have a single cleat on either side, in some cases obstructed by a bow rail and/or pulpit, which can make crossing lines difficult.
• Never shut those engines down until all the lines are secured . Again, remember that many cats can get blown out of kilter faster than the average monohull, and if you don't have lines preset, it may take a moment to figure out how to best secure them. Many a captain has done a perfect docking job and then shut off the engines, only for a gust of wind to push the boat right back out of the slip before the lines can be tied. Keep those engines running until the boat is 100% secure so you can apply power, if necessary, to maintain position.

Why Two Hulls?

Like all boats, catamarans come with distinct advantages (smooth ride, draft), and areas of compromise (docking, turning). Regardless of design aesthetics, the first question is usually: Why two hulls?

Mike Myers, vice president of product development for World Cat explains: "Catamaran hulls experience little to no drag or resistance to get on plane, resulting in greater fuel economy. They have a steady rise in speed and fuel burn with little to no spikes in fuel consumption."Planing powercats have a unique trait — which many cat lovers consider the top advantage over monohulls — the impact-absorbing cushion of air created by a compression tunnel between hulls.

And when it comes to beam, catamarans' parallel hulls create reliable stability, which helps to avoid heeling and capsizing, and greatly reduces the vessel roll at rest and at trolling speeds.

"Many boats are primarily designed around comfort for the captain. This usually means anyone at the front or sides of the boat takes most of the jostling,"Myers says. "The catamaran-style hull delivers ride comfort, smoothness, load distribution, and stability."That stability draws anglers to powercats of typically 20 to 40 feet; and cruisers to sailing cats 40 to 60 feet and beyond.

— Rich Armstrong

Taming The Cat

When it comes to handling powercats in open waters, the most important thing to remember is that all boats are different. Just as you wouldn't lump the handling characteristics of all monohulls together, the same goes for powercats. But many have a few common traits to consider.

• Some powercats have relatively low buoyancy in the bow compared to monohulls, as many have very narrow hull entries . As a result, in some cases, idling into a sea can allow waves to break over the bow. Gaining some headway so the bow rises a bit and packs air into the tunnel can alleviate the issue.
• Some planing powercats will run smoother at faster speeds than slower speeds, as they compress air in the tunnel between the two hulls. In these cases, speeding up may actually provide a more comfortable ride in some sea states as compared to slowing down. Depending on your boat, its tunnel may result in other differences from the monohull that you may be familiar with. Learning about these will improve you experience.
• Some powercats display a "snap roll,"which is a very fast righting motion that can rock the boat uncomfortably, especially when drifting in a beam sea. In these cases, people who may want to drift often (such as anglers) will sometimes deploy a drift sock off the bow to reduce rocking and rolling.

Photo: World Cat

• In general, powercats are often more weight-sensitive than monohulls, especially when the bow is loaded down . It's always best to be aware of how you're loading your boat, and if the tunnel is slapping or the bow is digging into waves, consider shifting weight aft.
• Some powercats, particularly older models, lean out in a turn rather than banking in. There's no way to eliminate this phenomenon (although trimming up an outboard engine when initiating a turn may reduce it a bit), so it's important to give passengers a warning to hold on before making any aggressive maneuvers.
• "Sneezing,"or blowing a puff of mist out the front of the tunnel that the boat then runs through (getting everyone aboard damp), is a phenomenon associated with some powercats. In many cases, trimming the bow up a bit will significantly reduce or even eliminate sneezing.

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Lenny Rudow

New Boats, Fishing & Electronics Editor, BoatUS Magazine

Top tech writer and accomplished sports fisherman, BoatUS Magazine Contributing Editor Lenny Rudow has written seven practical boating books, won 30 awards from Boating Writers International — many for his marine electronics articles – and two for excellence from the Outdoor Writers Association of America. He judges the NMMA Innovation Awards, and is Angler in Chief at FishTalk, his own Chesapeake-based publication. A great teacher and inspirational writer, Lenny hosts many of BoatUS Magazine’s very-popular how-to videos, which can be found on the BoatUS YouTube channel, or at BoatUS.com

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The 70 Sunreef Power JAMBO breaks records in fuel economy!

The 70 Sunreef Power JAMBO is a rare example of a luxury medium-sized power yacht (60-80 feet) with extremely high fuel efficiency, trans-Pacific range and top speeds reaching 20+ knots. This exceptional yacht was conceived by Sunreef Yachts with the help and advice from Laurent Bourgnon, a famous sailor with a wealth of experience in catamaran regattas. His expertise has been invaluable in the design of the first Sunreef power yacht. All other semi-custom yachts from the Sunreef power line have maintained the same hydrodynamic and performance-oriented line of the 70 footer.

The yacht is currently cruising around Raiatea, French Polynesia, where the Bourgnon family has been settled for a while and enjoys the relaxed local lifestyle.

The fuel consumption was originally 13 litres/ hour/ engine at 10 knots at 2,300 RPM. Following structural and technical modifications made by Sunreef Yachts (installation of water bulbs of 5.5m, and additional aft swimming platforms, increasing the JAMBO’s LOA to 85feet) and other companies (remapping of the engines for optimal use, and new sustainable and smooth antifouling), these numbers have been significantly reduced. The consumption now is 7.5 litres/ hour/ engine at 10 knots at 1,500 RPM, or 15 litres /hour!

“Thanks to the remapping of the engines, they now generate 420HP (instead of the original 370HP each), increasing the maximum speed to 22 knots. To cruise at a top speed of 22 knots, JAMBO needs 160 litres/ hour for both engines at 3,400 RPM, which is a very good result,” confirms Laurent Bourgnon.

EXAMPLE ITTINERARY/BUDGET/CONSUMPTION/RANGE

Distance: 8,500 nautical miles

Time: 1,000 hours (with several stopovers along the way)

Total fuel consumption: 15,000 litres, or 1,000 hours x 15 litres per hour at 10 knots

(Lower consumption on the Atlantic Ocean due to good currents; higher consumption in the Patagonian channels with opposing currents, strong wind and speed reaching 15 knots to reach safe harbour for the night)

Consumption per mile: 15,000 litres divided by 8,474 miles = 1.77 litres per hour

Range at 10 knots with 20,000 litres = 11,300 nautical miles

Budget : 15,000 litres at 0,50 Euros: 7,500 Euros

To continue from Puerto Montt to Raiatea, JAMBO needed only 5,000 litres of the total 20,000 litres of its reserves.

A perfectionist to the last, Laurent is still working on improving JAMBO’s performance and fuel efficiency. He is now working on new propellers, which are far more efficient that the original ones. Another remapping of the engines is also planned. The proposed changes will further increase the top speed, and bring an additional 20% improvement in fuel consumption. All together it makes the 70 Sunreef Power the best yacht for travelling to the most remote places around the world at a reasonable cost while maintaining luxury and maximum safety.

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9 Best Power Catamarans For Rough Seas and Coastal!

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Power catamarans are gaining popularity in the cruising world thanks to their enhanced stability and ease of operation. They’re ideal for coastal cruising but can also be used for ocean crossing thanks to their stability and speed.

Here are some of the best power catamarans on the market:

• Fountaine Pajot MY6
• Nautitech 47 Power
• Horizon PC74
• Lagoon Seventy 8
• ArrowCat 420
• Sunreef Supreme 68

In this article, I’ll review some of the best power catamarans out there. I’ll also go over the main features of different power cats and if they can handle rough weather. 

But before we dive in, let’s get a better understanding of what power cats are.

Table of Contents

What Is a Power Cat?

A power catamaran (power cat) is a motor-powered boat that, unlike traditional boats, has two hulls connected by a bridge deck. These vessels are more stable than monohulls because of their wide base.  

Power cats also don’t have a leaded keel to weigh them down, so they’re pretty lightweight and fast. The lack of a keel also means that power cats are more suitable for shallow waters.

They feature large engines designed to handle their bigger bodies and weights, and serve different purposes, like fishing, cruising, or crossing rough seas. In addition, each hull has a separate engine which makes them more maneuverable, especially at turns and tight spaces.

Power catamarans don’t have sails or masts and get all of their power from the combustion engine (or electric motor), unlike their sailing cousins. In addition, these vehicles are much easier to steer because of their increased stability.

Power catamarans have more interior and exterior space thanks to their multihull design, making them perfect for cruising and liveaboard . They also have ample space for storing everything you need on a cruise without worrying about weighing it down. Catamarans offer increased privacy as well because each hull houses one sleeping area, separated by the living area between them.

Are Power Cats Good in Rough Water?

Power catamarans are good in rough waters particularly because of their multi-hull design. Their wide base makes them stable, and their high speed allows for outrunning bad weather.

Power cats that feature a high bridge clearance, will handle rough waters effortlessly. With the added height, you won’t experience pounding and slamming even in heavy waves, allowing the crew to easily control the vessel in challenging situations.

These boats are also faster than their sailing counterparts, which means they can get you out of rough waters quickly.

In addition, since catamarans are large and tall, maneuvering is easier because you have a better view of the surroundings. Additionally, you can steer from the interior cockpit (on certain models), making it easier to control the vessel in bad weather.

Finally, although a power cat doesn’t have a keel to help it right itself in case of capsizing, it will still float easily because of its positive buoyancy.

Are Power Catamarans More Efficient?

Power catamarans are more fuel-efficient than monohulls because they don’t have leaded keels. While keels are designed to offer stability by weighing down the vessel, they increase the wetted surface and thereby add drag.

Due to the catamarans’ narrow bow entry, there’s lower resistance, leading to smoother acceleration and greater fuel economy in catamarans. In addition, power cats show fewer spikes in fuel consumption in a single power band, especially because of their smooth acceleration and fuel consumption.

The figures reported by cat owners or manufacturers show that power cats have the best power-consumption-to-speed ratios.

That being said, you can improve fuel efficiency by maintaining lower speeds; studies have shown that speed can be the most important factor in fuel efficiency, regardless of the number of engines or hull types. 

Now that you have a better understanding of power catamarans, let’s take a look at the ten best models on the market.

1. Leopard 53

This 53ft (16.19m) power cat is the fourth generation of the widely popular Leopard catamarans, and brings with it all the great features from her predecessor, the 51. 

Although the 51 was the company’s best-selling cat, they added these features to the 53 along with new ones to repeat its success. For example, they have built an enormous saloon, flybridge, and galley by removing the foredeck cockpit in the 51 PC, making it 30 percent larger than the previous model.

This model comes with three or four stateroom layouts, with the 3-stateroom version featuring an owner’s stateroom, two sinks, a loveseat, and lots of storage space.

With two Yanmar 370 hp engines, a maximum speed of 22 knots, and a cruising speed of 17.5, you can enjoy a magnificent ride, whether it’s long-distance cruising or a fun night out with friends.

2. Fountaine Pajot MY6

This luxury power cat is 44ft (13.40m) long, making it super spacious and suitable for families and big parties. With its spacious flybridge, sunbathing lounge, and enormous galley, it’s nothing short of a second home on the water. 

You can steer the cat from the saloon or the 21sqm (68 sq ft) flybridge which features a sunbathing lounge, a pool, and a galley.

This motor yacht continues to delight with its luxurious combination of privacy and pleasure, with views of the sea in almost every interior space. With three cabins, two bathrooms, six cabin beds, ample storage, and a kitchen that opens into the cockpit, you can enjoy practicality and luxury in one place.

The MY6 is exceptionally seaworthy and stable thanks to its wave-piercing hulls and Volvo IPS engines.

Like all power cats, it has straightforward steering, enabling you to control this beast even in the roughest circumstances.

3. Nautitech 47 Power

Powered by dual Volvo Penta D4 engines, this model can output 225-300hp, reaching a maximum of 22 knots and a cruising speed of 18-20 knots . This 46′ 8″ (14.23m) long power cat comes in three or four cabin versions, depending on the customer’s preference.

No matter which layout you choose, you’ll get a spacious, luxurious, and comfortable catamaran with panoramic views from the cabin. The sleek, streamlined exterior design ensures elegant sailing and seaworthiness.

It’s easy for passengers to navigate the deck thanks to its seamless design that connects the saloon to the cockpit and the rear deck. The stern features a big swimming platform that can also accommodate a tender. The cockpit is usable in different weather conditions thanks to the clear covers wrapping the whole area.

This efficient catamaran promises long cruising for big families and groups with two 300L water tanks and a pair of 645L fuel tanks.  

4. Horizon PC74

The Horizon PC 74 is another luxury power cat that can give you the comfort of your home on water. This 73′ 9” (22.48m) long power cat with a 2,000gal (7570L) fuel tank is an enormous vessel that can accommodate more than 14 people.

The enormous hardtop on the three-piece windshield, the teak dining table, the U-shaped bar, the sun pad, and the swing-out stools all guarantee that you’ll have the luxury cruising experience of a lifetime.

This vast and wide catamaran allows you to access the aft deck from the flybridge via a curving staircase. The vast aft deck has a ten-person dining table, a wet bar, and storage space. You can separate the interior and exterior spaces through sliding glass doors and make the space appear bigger by opening them.

Reaching a top speed of 23 knots and a cruising speed of 19 knots, this enormous catamaran was built for efficiency and practicality.

5. Lagoon Seventy 8

This 78’1″ (23.80m) power cat with two 494 HP engines and a 2246gal (8500L) fuel capacity is one of the largest power cats on the market, offering both comfort and reliability. The enormous flybridge can feature a jacuzzi, a sunbathing area, a large foldable dining table, and a hardtop with a moveable roof. However, you can customize the flybridge based on your preferences.

The designers have compromised nothing in terms of elegance and high-quality materials with top-of-the-line finishes and interior paneling to create the kind of luxury you want.

The saloon is huge, well-ventilated, and separated from the exterior by glass doors and panoramic windows.

But what sets Lagoon Seventy 8 apart from other power cats, in addition to its enormous size, is the wide choice of layouts. You can choose between five different versions, all offering the same amount of storage space, living and sleeping area, and privacy.

Additionally, some versions are fully customizable, allowing you to pick every detail to your liking.

6. ArrowCat 420

This 41′ (12.73m) long express cruiser is a semi-custom catamaran with two-stateroom and three-stateroom layouts. The ArrowCat 420 is designed and built with comfort and strength in mind, and capable of handling rough waters safely.

The two Suzuki 350 hp engines give this model a maximum speed of 40 knots and a cruising speed of 20 knots.

The streamlined design and the angled hulls ensure the vessel cuts through the waves effortlessly, making it easy to maneuver.

The fully-equipped head features an electric toilet, a shower, sink, and mirrors, coupled with a dining table, floor storage locker, and teak-finished floors. This cat is built to combine luxury and comfort for both onshore and offshore cruising.

7. Bali 4.3

This 43′ (13.1m) power cat is made for ocean crossing in mind. With five different layouts featuring different combinations of cabins and heads, the company ensures you’ll get the kind of setup you want. Regardless of the layout, this cat offers a spacious master suite with a large double bed and other private sleeping quarters.

You can quickly add to the overall space by removing the adjustable glass doors to merge the cockpit with the saloon.

A feature that sets the 4.1 apart from its predecessor is the fixed aft deck between the hulls, which provides a passageway and eliminates the need to go from one hull to the other without entering the cockpit.

8. Sunreef Supreme 68

According to its designers, this model was built with a radical concept in mind while staying true to the company’s promise of building the most comfortable and spacious power cats in the world.

One of the greatest features of the Supreme 68 is its aft garage that houses a 5m (16 ft) tender and two jet skis in addition to other water toys.

You can also transform the aft to a large platform for water sports by lowering the garage door.

The four-stateroom layout features ample storage, ensuite guest cabins, queen-sized beds, and TVs to create a memorable stay. The white and beige furniture with chrome details and floor-to-ceiling glazing create a soothing atmosphere that blends with the practicality of the well-equipped galley. 

However, if you’re looking for something different, you can opt for a customized model from three different layouts.

9. Hudson 48

The sleek, diamond-cut design of this 46.46’ (14.16m) long power cat is usually the first thing to catch your eye.

It’s a light displacement cat that ensures fast cruising with a top speed of 24 knots and cruising speed of 8 knots thanks to the two 370hp Yanmar V8 engines.

The three-cabin layout features a master stateroom with a spacious and well-ventilated design made possible via the three overhead windows and opening deck hatches.

The saloon’s enormous helm station allows for comfortable and safe accommodation, making it great for rough waters and bad weather conditions.

This model also offers a few entertainment options with its large TV systems and mood lighting. The storage areas and the full-sized walk-in wardrobe give this model a comfortable, homely setting.

Here are Some of My Favorite Catamaran Cruising Resources

Thank you for reading this article. I hope you found it helpful as you hopefully start your sailing adventures. Here are some resources that I use as a sailor that I hope you’ll also find helpful. These are affiliate links, so if you do decide to use any of them, I’ll earn a commission. But in all honesty, these are the exact things that I use and recommend to everyone, even my own family. Sailboats: If you’re looking for the best boat to suit your needs, I would recommend a catamaran. If you’re interested, I can show you the differences between catamarans and other types of sailboats .

Books:  For getting started, I really like  Cruising catamarans made easy . It is actually a textbook from the American sailing association; it is used to get a cruising catamaran certification. There are some other great books, and I have compiled a list of books about cruising catamarans that you will find useful.

Communication:  Being out on adventures, whether it be sailing or climbing mountains, good communications are essential to being safe. I recommend two things Google fi (incredibly simple cellular data all over the world) and Garmin inreach mini (for text and voice in remote areas without cell coverage)

Sailing courses: Online sailing courses are great for beginners starting out their sailing career; it’s an efficient way of learning the basics of navigation, throttle controls, and maritime safety. I suggest starting with two free courses from NauticEd .

To see all my most up-to-date recommendations,  check out this resource  that I made for you!

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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Introduction

The benefits and compromises of owning a power catamaran are usually obvious for different consumers, depending on their circumstances, boating ambitions and level of experience. However, a rapidly growing number of seasoned boaters are learning the joys of owning a catamaran and end up becoming firm catamaran supporters.

We have witnessed amazing changes to how families go boating together on a catamaran. For many families, the catamaran yacht has enabled their kids to join and bring their friends without overcrowding the boat. Guests do not have to be seasoned yachties to enjoy the day in the stable and protected cockpit. While entertaining can be done with style and without stress.

The most compelling argument of all must be this: seasoned monohull boaters are converting to catamarans by the truckload. Many converted former motor yacht owners are now passionate advocates of power catamarans. For experienced yachties demanding performance, the advantages are simply too great to ignore.  It is rare to hear of any catamaran owners ever going back to a monohull. Once you become a catamaran owner, you are hooked for life.

“Why should I buy a power catamaran instead of a similar sized motor yacht?”

We are regularly asked by buyers “why should I buy a power catamaran instead of a similar sized motor yacht”. Like everything, there are benefits and compromises to the power catamaran. Despite ourselves being firm Catamaran converts and lifetime believers, below we offer a balanced comparison of the pros and cons.

Advantages of Monohulls

A monohull, as the name implies, has just one hull. This is the most common type of hull design, but why? To produce a well balanced comparison lets start by investigating the benefits of monohulls:

Slow roll period

• Many brands and builders to choose from

More usable space below waterline

Familiar handling.

While monohulls roll back and forth far more than a catamaran, monohull fans will argue that the slow roll period of a monohull has a comforting effect.

There any many brands and builders to choose from as most builders still only produce monohulls. Whilst this trend is changing, 50+ years of composite boat building has been heavily monohull focused. This does mean that there is a far greater selection of vessels, designers and brands and builders to select from.

Whilst the monohull comparably has less interior space, the wide waterline beam (width) allows for greater use of the internal hull height. This either enables builders to mount tanks and storage below cabin floors or to actually expand the cabin below waterline. As a catamaran gains performance via its light displacement and narrow waterline beam, this is often not practical on a catamaran.

Jumping from one boat to another will feel extremely familiar as the differences in handling between brands is minimal, with the exception of planning hull vs displacement hull. Focusing on planning hulls, however you will quickly feel familiar jumping from one boat to another. On the contrary, the difference in handling from a monohull to a power catamaran are immediately apparent.

Disadvantages of Monohulls

Now that we have seen the advantages of a monohull, lets analyse some disadvantages one might encounter while boating on a typical V-bottomed or deep-V motoryacht.

Low stability

Bow steering, rolling at anchor, significant bowrise.

Due to the wide flat hull shape required to get the monohull more quickly into planning mode, it can produce a rather bumpy ride when motoring through waves. Performance through waves can be significantly improved or diminished depending on the hull shape. For instance, a deep V hull will be more comfortable through waves than a shallow V. However, both are significantly outperformed by even the worst power catamaran designs.

A monohulls heel angle is directly affected by weight placement. Moving too much weight to port or to stbd will cause the vessel to heel. This is significantly noticeable when at anchor however even underway an incorrectly loaded monohull can dangerously heel. This can be overcome underway by the use of trim tabs. However, is best overcome by conscious weight placement and management.

Bow steering usually occurs when motoring at speed in a following sea or when passing another vessels wake. If you are inexperienced and do not know what is happening it can be quite frightening. Basically, the boat will suddenly and often expectantly turn hard in one direction while rolling hard in the opposite direction, despite your efforts to steer straight. Bow steering can be prevented with the installation of trim tabs. They can enable you to raise the bow up and out of the water when in a following sea. Trim tabs are not needed on a catamaran due to the natural separation of hulls bow steering.

At times you will undoubtedly come across anchorages that aren’t completely flat. When this happens, monohulls, that rely on the weight of their COG (center of gravity) to be aligned below their COB (center of buoyancy) to keep them upright, will start to rock from side to side. Things roll around inside, plates go flying. It’s uncomfortable or sometimes impossible to cook, and only the hardiest of yachties will be getting any sleep. 

While all of this is going on, at the next mooring ball, the power catamaran owners are sitting in their cockpits sipping sun-downers, barely noticing the movement, quietly getting tipsy before a long night’s sleep.

The degree of bowrise varies with monohull designs. However, for those of you unfamiliar with this term, bowrise is the tendency of a boat to point its bows up in the air before it gets into planning mode and then settles somewhat. This puts passengers through an uncomfortable, and sometimes unnerving experience whilst also exposing the vessel to a decreased level of stability and safety.

POWER CATAMARAN

Advantages of power catamarans.

Whilst individual designs can vary by design and their usage, the benefits below are typically universal for most catamarans. In comparison to the equivalent length monohull a catamaran shall deliver the following advantages:

Superior ride comfort

Enhanced stability at anchor and underway, up-scaled cabins and interiors, larger single level cockpit and saloon, significantly improved fuel consumption.

• Drastically improved close-quarter maneuvering

Catamarans experience slower deceleration through wave impact. This significantly reduces slamming through waves. This has been measured with accelerometers in like for like tests to have a 25% reduction in G forces when riding over waves.

Due largely to their wider beam, catamarans have a remarkably higher righting moment compared to monohulls. This prevents them from rolling side-to-side when at anchor, and keeps them sitting level both underway and at rest . This is regardless of placement of people or luggage, this also eliminates the need for catamarans to use trim tabs.

More interior volume, especially in power catamarans that carry their beam all the way forward. Even applicable in the smallest cats that will usually have stand up headroom in each cabin, unlike smaller monohulls. As a result of this increased volume, a power catamaran will always feel over sized – more fairly compared to a monohull 15-20% longer in length. A 35ft power catamaran for instance is more fairly matched against a 43ft motor yacht.

Catamarans generally provide far more living space in the main salon and cockpit in comparison to similarly priced monohulls. The galley, main salon and cockpit are also all on one level, above the water line … making life aboard as well as your view much more enjoyable.

Due to their reduced displacement and wetted surface area power catamarans are impressively efficient. The wider monohull bows create a large bow wake and greater resistance, which require more HP to get onto plane. Not only does this burn more fuel, but also enables a catamaran to get onto plane under just one motor. This is a significant safety advantage, enabling a boat with only one working engine to return to shore before dark rather than limping home at below planning speeds. The ability to plane at lower RPM’s enables cruisers not wanting to travel at groundbreaking speeds to achieve highly efficient low speed planning. Vastly expanding their cruising ground while not breaking the bank nor taking all day to get to the next anchorage. Learn more about power catamaran fuel consumption HERE>>

Drastically improved close-quarter maneuvering: A large separation between the port and stbd engine drastically improves close-quarters maneuvering. This enables a power catamaran to literally rotate within its own waterline length by simply putting one engine in reverse, and one in forward. Add a joystick control and you’re in command of one of the easiest boats that you will ever dock.

Disadvantages of Power Catamarans

Despite the significant benefits gained by the power catamaran, there are also a few unusual traits associated with powercats:

Outward banking

Snaking at anchor, tunnel-slap, unusual appearance.

When making sharp turnsm a monohull will bank (roll) into the turn. A catamaran, on the other hand, due to its increased stability and righting moment will actually bank slightly outward. If coming from a monohull background, initially this sensation will feel unusual. However, If you have no prior expectations regarding the outward bank offers ,no benefits or disadvantage over the inward bank.

Due to the power catamarans wide beam and asymmetry, when at anchor a shifting breeze will cause the vessel to turn to port and stbd in a snakelike movement.  If the wind has some strength and continues to shift, this movement can become uncomfortable. We therefore recommend attaching an anchor bridle whenever anchoring which completely eradicates this effect.

In certain conditions, catamarans can experience tunnel slap. This is where a wave passing under the tunnel rises up and slaps the wingdeck surface causing a thud or slapping sound. This effects different catamaran designs in various ways depending on whether they are of displacement or planning type. A displacement catamaran requires a high wingdeck to overcome the wave crest heights in order to ride over the top of the waves. Planning catamarans, on the other hand, should have narrower and shallower tunnels. This forces a compressed air mixture through the tunnel, creating a cushioning and lifting effect lifting the catamaran above the surface of the water with intensity increasing as speed increases.

When asked, many monohull owners claim they do not like the unusual appearance of a power catamaran. Whilst styling preference is subjective, at Makai we have worked hard to design a power catamaran that delivers all of the benefits of a catamaran. Whilst doing so with attractive and unmistakable styling.

CONCLUSION : Power Catamaran or Monohull?

Whilst each have their own advantages and disadvantages the final choice is completely down to personal preference. Clearly, we are die hard catamaran believers, but we also believe that what is most important above all else is just getting outside and on the water, having fun and being safe. So, when you find the boat that does all of the right things for you, go for it!

Learn more about MAKAI Yachts HERE>>

Learn more about the MAKAI M37 HERE>>

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Fuel Efficiency Means More Time Aboard

Experienced boaters understand that fuel costs can affect how much they can use their boats. While it is not the only factor, fuel-price fluctuations can have a serious impact on the amount of cruising boaters can do, the range of their cruising, and the time they can commit to the sport. That is why Aspen efficiency makes sense. Contributing factors to fuel burn on any boats, whether they are monohulls, multihulls, go-fasts, or slow cruisers, are weight, wetted surface, and appendage drag. To go faster other boatbuilders add more horsepower which means increased engine weight, fuel weight, equipment weight and appendages. Others find efficiency by simply going slow which means longer running times that ultimately add to fuel consumption. We prefer to approach the challenge another way, with a hydrodynamic hull form that slips easily through the water requiring less power to propel the boat. Aspens offer speed, efficiency, and performance without adding extra horsepower.

Our engine configurations provide power options to suit our owners’ needs, whether it is the smooth reliable power of an inboard diesel or the flexibility of two outboards of different horsepower matched to each unique Aspen hull.

On the inboard package, the reduced appendage drag of the single rudder and prop matches the asymmetrical hulls of the patented proa design.

The outboard package is designed to use both engines together but can use one or the other at a time, depending on the desired speed. For instance, the smaller engine acts as an efficient trolling motor when fishing.

Patent No. US 8,109,221 B2

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THE KEYS66' Valder Yachts Power Cat 2021

$ 3,999,000

• GLIDES ABOVE THE WAVES ON FOILS
• CAPABLE OF OVER 40KTS, RANGE OF OVER 2000 NM AT 10KTS
• LAND YOUR HELICOPTER
• STAND ALONE OR MEGA YACHT SUPPORT VESSEL
• ORIGINAL OWNER, NEVER CHARTERED

Constructed of carbon fiber, powered by MAN 1300 engines The Keys is able to glide above the waves on foils at 45kts. Fluid styling and elegance features throughout the interior. The open plan salon provides natural light through large windows. Features include a cozy lounging area, a cocktail bar and well-appointed galley. Forward of the main helm is a full beam master stateroom with ensuite bathroom. Three other staterooms complete the interior highlighted with natural wood tones and woven flooring coverings creating a modern yet timeless elegance.

Specifications

• Price USD: $ 3,999,000

Valder Yachts

Fort lauderdale, florida, united states, power yacht.

• LOA: 66 ft in
• Display Length: 66 ft
• Beam: 22' 3"
• Water Capacity: 556 gals
• Fuel Capacity: 2500 gals
• Engine Details: MAN V8
• Engine 1: 420.00 HRS 1300.00 HP
• Engine 2: 420.00 HRS 1300.00 HP
• Engine Fuel: Diesel
• Days on Market: INQUIRE

+ Fuel Consumption

• 800 RPM: Cruise at 10 knots, 4.44 L/NM fuel consumption. Travel up to 2027 NM in 203 hours. 
• 1000 RPM: Speed up to 11 knots, 7.54 L/NM. Travel 1194 NM in 109 hours. 
• 1200 RPM: Achieve 14 knots, 9.78 L/NM. Travel 920 NM in 66 hours. 
• 1400 RPM: Glide at 20 knots, 8.26 L/NM. Travel 1089 NM in 54 hours. 
• 1600 RPM: Swiftly move at 26 knots, 7.78 L/NM. Travel 1157 NM in 45 hours. 
• 1800 RPM: Reach 30 knots, 8.64 L/NM. Travel 1041 NM in 35 hours. 
• 2000 RPM: Hit 34 knots, 10.82 L/NM. Travel 832 NM in 24 hours. 
• 2200 RPM: Soar to 37 knots, 11.88 L/NM. Travel 757 NM in 20 hours. 
• 2388 RPM: Top speed of 45 knots, 12.54 L/NM. Travel 717 NM in 18 hours.

+ Disclaimer

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Long range power catamarans

Peter Brady provided a brief history ( Multihull World Magazine, #142 ) of how he saw the development of long distance power catamarans:

Arthur Defever 1960’s (“long range cruising” monohulls) –> Robert Beebe 1974 (“passage maker” monohulls) –> Malcolm Tennant 1990’s (catamarans) &  Roger Hill 1990’s & Peter Brady 1990’s in Australia (catamarans).

The qualities of the “passagemaker” were defined by Beebe as 2,400nm range at 7.5kn, self-sufficient for at least two weeks.

Brady opines that 2,000nm at displacement speed is a “reasonable bench mark”, with 55-65′ boats making 8kn at “displacement speed”.

This “displacement speed” indication is perhaps a better metric and allows calculation of the standard “ hull speed ” calculation of 1.34 x sqrt(LWL), with a “displacement speed” changing the multiplier from 1.34x to 1x or 1.1x (so a 49′ boat would average 7-7.7kn, a 64′ boat would average 8-8.8kn).

It is worth saying now that many trimarans and catamarans are acknowledged as NOT being limited by this theoretical hull speed as the formula is based on the hydrodynamic (wavemaking) properties, but hulls that are very narrow for their length (some say 8:1 or more on LWL:BWL) may instead be more limited by the interaction properties of the waves off each hull. There is not

So as a working definition, a passage maker or long range cruiser can be classified as being able to go at least 2,000nm on standard tanks at a speed of 6-8kn (depending on length, but 36-64′ covers most cruising size boats).

I have collected fuel consumption, displacement and size for quite a collection of power catamarans that I consider cruising boats. By this I mean they have considerable range and autonomy, have a displacement or semi-displacement hull shape, and can sleep at least two couples. This precludes the larger and smaller fast fishing boats (hull shape; range), patrol boats (comfort; sleeping), and all the smaller aluminium cats.

Based on the data I have collected, for production boats, these are long range passage makers:

• Sunreef 70 – range 3200
• Africat 420 – range 2800
• Fountaine Pajot 46 Cumberland – range 2100

and for non-production boats, these are those I can find enough data to support as long range:

• Tennant 66 Domino – range 7000nm+
• Tennant 60 Catbyrd – range 6000nm+
• Tennant 54 PH8 – range 3000nm
• Tennant 44 St John – range 2000nm
• Roger Hill 66 Tenacity – range 2500nm
• Roger Hill 66 Lola – range 3200nm
• Brady 17.5 Passagemaker – range 3200nm

By definition, these power catamarans (a mix of one-off and production boats) are not long-range:

• Fountaine Pajot 37 Maryland (with 75hp engines, not 150hp) – range 1500
• PDQ 41 – range 1500
• Pachoud 49 Solitaire – range 1250
• Fountaine Pajot 37 MY – range 1200
• Lagoon 43 – range 1200
• Horizon 52 – range 1150
• Fountaine Pajot 35 Highland – range 1100
• Fountaine Pajot 44 MY44 – range 1100
• Ligure 50 – range 1100
• Aquilla 48 – range 1050
• Fountaine Pajot 40 Summerland – range 1000
• Fountaine Pajot 44 Cumberland – range 1000
• Leopard 51 – range 1000
• Leopard 43 – range 1000

and those with less than 1000nm range at the requisite speed:

• Aquilla 45 – range 950
• Leopard 37 – range 900
• Fountaine Pajot 34 Greenland – range 900
• Aspen 120 – range 750
• PDQ 34 – range 680

Going non-production, you are generally into one-off builds. Even though the big-name designers may have sold multiple hulls of the same initial design, these are often modified over the build so that they may only partly resemble each other once finished.

Lastly, the technical list of non-long range power catamarans ignores the fact that all of those referenced have an excellent range of at least 900nm. There are few times in a passage maker’s travels where more range is needed – the Pacific (Panama-Marquesas) and Atlantic (Bermuda-Azores, Cape Verde-Barbados, Cape Town-St Helena) are such, but these are an extremely small part of the time on water a passage maker spends compared to being close to land and places where diesel – quality or not – is available.

As a final warning, almost all of the above it theoretical waffle. It doesn’t take into account some vital points of decision: is the boat designed and built to handle the conditions of a long passage? Are the people aboard capable and ready for such voyages?

If you know of other long range power catamarans and can provide at least three data points of speed-consumption, please let me know and I can add them.

Other interesting articles about power catamarans are:

• Shuttleworth on his Adastra
• Some of Malcolm Tennant’s ideas
• Alex Simonis on the Leopard 43 and why Power Catamarans Don’t like to go Uphill
• Noah Thompson on hull fuel efficiency

and for some first hand information, Domino and SnoDog are fantastic.

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3 thoughts on “Long range power catamarans”

I didn’t know this about power cats. So few go long range! How interesting.

[…] the range you can travel a lot (no ocean crossings and possibly no multi-day trips). We want to go long range cruising […]

Thanks for the sensible critique. Me and my neighbor were just preparing to do some research on this. We got a grab a book from our area library but I think I learned more from this post. I’m very glad to see such great info being shared freely out there.

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54 Yacht Power Catamaran

Aquila’s rapid growth and global success have challenged our international design and engineering teams to elevate expectations with a newer, larger, and more elegant cruising model. The Aquila 54 Yacht Power Catamaran embodies the reliable features and construction methods of the hundreds of Aquila yachts and boats cruising the waters of the world. This model also enhances on board luxuries with full-size refrigeration and layouts that include 3, 4, and 5 cabin options as well as skipper's quarters and “galley-down” layouts.  Owners will delight in panoramic views that fill the master cabin with natural light through large hull side windows, adding to the spacious feeling of the full-beam forward master cabin.  Engineered with an open flybridge and solid glass front windscreen, or a completely enclosed and climate-controlled flybridge, the Aquila 54 Yacht Power Catamaran features the versatility to appeal to a global audience of boating enthusiasts.

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Experience the Aquila 54 Yacht

The Aquila 54 Yacht Power Catamaran embodies the reliable features and construction methods of the hundreds of Aquila yachts and boats cruising the waters of the world.

Full In-Depth Walkthrough

Take a walkthrough with us! The Aquila 54 Yacht Power Catamaran embodies the reliable features and construction methods of the hundreds of Aquila yachts and boats cruising the waters of the world. This model also enhances on-board luxuries with full size refrigeration and layouts that include 3, 4, and 5 cabin options as well as skipper's quarters and “galley-down” layouts.

Behind the Design

With added versatility and more space, the Aquila 54 Yacht Power Catamaran embodies the reliable features and construction methods of the hundreds of Aquila yachts and boats cruising the waters of the world. This model also enhances on-board luxuries with full size refrigeration and layouts that include 3, 4, and 5 cabin options as well as skipper's quarters and "galley-down" layouts.

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BoatTEST: Aquila 54 Yacht Performance

View a full, in-depth Captain's performance report on the Aquila 54 Yacht, by BoatTEST - the most credible source for reviewing test data and performance. 

BoatTEST: Aquila 54 Yacht Features

View BoatTEST's thorough review with Capt. Steve on the Aquila 54 Yacht. This boat isn't just bigger. A lot of independent thought went into the design and features. Check it out. 

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Aquila models.

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TECHNICAL FEATURES

Specification at a glance, water capacity.

169 US gal / 640 L

fuel Capacity

370 gal / 1400 L

Displacement

28 819 lbs / 13 829 kg

STANDARD ENGINES

2 x 250 | 320 | 370 hp

Waterline length

39 ft 7 in / 12.07 m

length overall

40ft 0 in / 12.19 m

3ft 7in / 1.10 m

21ft 8 in / 6.61 m

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Cruising speed, load carrying capacity.

12410 lbs / 5629 kg

Holding Tank Capacity

42 gal / 160 L

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