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Roger Hill 19m Power Catamaran - Bajaca

Design Concept

With those goals in mind, it was clear to Roger that a semi-displacement hull form would meet the type of boating and performance the clients were looking for. Live aboard ability was critical so fuel capacity, water-making ability, power generation, and storage were priorities in the design.

Launched December 14 2015, the 18.7 metre Bajaca designed by Roger Hill Yacht Design, New Zealand, was commissioned by a Sunshine Coast businessman with a brief for up-to-date styling above the waterline, self-contained facilities for extended cruising in remote areas, and the ability to run at 25 knots if required.

Construction

Because of previous project experience and construction successes, Roger based the design for construction with ATL Composites DuFLEX composite panels with structural DIAB Divinycell foam cores.

The hull bottoms, lower topsides, chines and engine bearers were cored with 30mm Divinycell H130 and laminated with 2 layers of 850grm E-fibreglass quadraxial. Divinycell H has a proven track record, and its unique IPN chemical structure, yields impressive mechanical performance making it ideal for applications subject to fatigue, slamming or impact loads.

DuFLEX panels, cored with Divinycell H80 and laminated with a variety of fibreglass orientations, were manufactured for all other structural areas, predominantly in flat panel form, but in some cases, with unidirectional laminates for strip planking curved sections, to optimise the engineering and performance in specific areas.

ATL’s Featherlight panels have been supplied for the non-structural interior parts, and are cored with lower density Divinycell H60 and H35 cores laminated with a 600grm quadraxial E-Fibreglass to ensure uniform stiffness, stability and lightweight. The interior panels will be finished with a combination of timber veneers, decorative fabrics and some painted sections.

Roger commented “Construction with DuFLEX will ensure the required weight, stiffness and stability is achieved to optimise the performance and fuel consumption without sacrificing comfort or performance. Using the DIAB foam- cored DuFLEX option has saved approximately 2,000 kgs over more conventional building methods”

To take full advantage of the DuFLEX Building System, Roger worked with ATL engineers to supply the design as a CNC-routed kit to reduce labour and keep wastage to a minimum, and a DuFLEX Z-Press was supplied to Noosa Marine to join the panels and further speed up the build process.

The design layout was developed closely with the owners keeping the cabins as large as possible with full head room. The main cabin/saloon area is open plan with the doors and windows sliding away to allow entry to the cockpit with no step-over sills, and the large dining space is easily served from the galley or the BBQ on the aft platform.

The owner’s cabin is forward, featuring a large ensuite bathroom, and takes the full width of the starboard hull. The prime guest cabin also has its own ensuite and the other two secondary guest cabins share a large, mid-ship bathroom that includes a full-size domestic washing machine and separate dryer.

The design does not have a conventional flybridge, but does have a sun-bathing area on the cabin top where the tender is stored with a davit crane and a surfboard/paddleboard rack. This cabin top area is also fitted with large sliding hatches to maximise ventilations and light into the forward area of the saloon.

The boat will comfortably house family and friends, and the modern design, extensive entertaining both inside and out, luxurious interior, and a cruising speed of 16 knots will make it perfect for long range cruising and living.

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Roger Hill of Roger Hill Yacht Design on the heli-deck of Kukai, the 14-metre powercat he exhibited at the show.

Roger Hill Yacht Design

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Roger Hill Yacht Design Ltd

Yacht design, power and sail, catamaran and mono, private and commercial. Roger Hill Yacht Design is a well established and thoroughly professional design company. Following client`s detailed briefs and requirements through the complete design and build process ensures a high degree of satisfaction for both parties. A project can only be termed a success if the client is happy with the result!

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14.8m Planing Power Cat

Fully spec'd live aboard cruising boat.

This design is a development of our slightly larger 15.9m planning cat design, an up dated and slightly refined styling with similar features and a very similar layout inside.

The NZ based client intends to use the boat in local waters and from time to time ship it up to the Pacific Islands for extended winter cruising. The original concept was to build a much larger, ocean passage capable cat but it was resolved to build a handier size for a couple to use and with the money saved over from the larger cat used for shipping and cruising in the Islands.

This brought us back to a planning hull form instead of the more economic semi displacement hull because there was no longer a requirement for long range and the need to be able to go quite fast from time to time was important also.

The boat is designed to be built completely out of foam cored composites, epoxy resins, and the judicious use of carbon fibre where it can make the biggest impact on the stiffness and weight for a particular panel and justify the expense.

It was built to the NZ MSA survey standard for coastal chartering work which would also qualify it for Queensland waters.

The lower deck has our typical 3 cabin layout, owner’s with ensuite, and 2 guest cabins with a variety of berth configurations. The live aboard aspects are well look after with a full size laundry, water maker, and air conditioning. The main deck has a very large galley with all the appropriate appliances, a comfortable lounge seat and a raised dinette fwd. The cockpit has built in seating around a permanent table, built in BBQ and sink, additional fridge and freezer, and large heads with toilet and shower. The flybridge is fully enclosed and air conditioned, accessed from the lower cockpit via a spiral stairway, there is another fridge and sink behind the offset double helm seat and a larger seating area to port that can also convert to a double berth.

Motive power is from a pair of 540hp electronic diesels and a cruising speed of 25 knots will be easily achieved. Also in the engine room will be the 12 Kw gen set, the hot water heater, and the water maker.

Do you like what you see?

Contact RHYD about this design

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BOAT REVIEW Roger Hill 18m Foil-assisted Power Cat Souvenir

• Smooth and fast
• Luxuriously appointed
• Masses of space
• Joystick helming a breeze
• Massive range
• Huge range for ocean voyaging

Every new design from catamaran guru Roger Hill contains fascinating innovations. His latest vessel even has the wildlife talking.

The channel markers whizz by like lamp posts on a motorway and the two blokes fishing mid-channel in a tinny become a navigation hazard which requires a decision well in advance of their rapid arrival. It keeps me on my toes and I am constantly scanning the chart-plotter and way ahead trying to anticipate a rapidly-moving scene. A short sortie out to sea and we get a taste of Souvenir ’s offshore capability. A slight left-over swell proves that the foil lets us down easy instead of slamming. Down swell the same applies with no decelerations as she overtakes the wave ahead. The Zip Wake trim system works well in conjunction with the foil to make high speed offshore work a possibility.It is not until later in the afternoon when I am left bobbing along in the OC Tender ready to take photos, that I realise just how impressive this craft is. Being buzzed by an 18m work of art going like the clappers is enough to give you a glimpse of the future. It’s also enough to get you talking to a potty-mouthed black-backed gull.

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Roger hill 12m design takes shape with duflex composite panels.

The divinely named “Celeste”, a 12-metre Roger Hill-designed power catamaran, is in build at G & T Marine, Auckland – it’s the first time seasoned boat builder Grant Symmans has worked with the DuFLEX panel system and Z-press from ATL Composites.

The privately-owned, custom-built, displacement-hull power cat is on track for delivery by May 2023 to an experienced owner looking for volume and ease of cruising.

So far, according to Grant, he has used the Z-press to join the DuFLEX panels for superstructure and cabin top.

“It’s a first for me,” he states. “Roger is a huge fan, so we went with it. It’s labour saving, comes as a kit, and the DuFLEX is lightweight and sturdy.”

The 12-metre vessel is a “fairly straight forward” build, single level sedan with a beam of 4.8-metres.

“Using DuFLEX has made construction a simple process and at this stage we’re impressed with it. We’ll know more when we do the hulls,” Grant adds.

Using ATL’s Z-Press streamlines the composite panel joining process, applying heat and pressure to cure the epoxy adhesive on the Z-Joints. Joins cure fully in 7 to 20 minutes, depending on the ambient temperature, type of hardener, core type and thickness of the panel.

Roger Hill, specialist power multihull designer, says the client sought a well-appointed powercat for “the next phase of his cruising lifestyle”.

“I have always said that these displacement hull power cats we design are ‘sailor’s power boats’,” he explains. “That is, when you have been a yachtie all your life and you’re facing the unavoidable ravages of time on your old body but don’t want to give up boating, these cats are a good option!

“For Auckland-based yachties who have been cruising around at around 6 to 8 knots, a lot of the time motoring (as you get older), and a lot of the time beating to windward, these smaller displacement hull power cats are ideal.

“They cruise most economically around 14 to 15 knots, or about twice the speed you have been used to going all of your previous boating life, and they are really fuel efficient. Also, they will motor directly into any head wind and nasty sea state without spilling your drink, or leaning over.”

Fortuitously, the client is Roger’s very first when he struck out on his own and established his design firm 27 years ago.

“He owned his lovely 11.9-metre cruising yacht from new, it fitted his requirements perfectly all of that time and he kept it in immaculate condition. Like all of us, he is getting older and the physicality of sailing a yacht basically on your own was starting to tell.

“He made the very hard decision to sell and move on with the next phase of his boating life. They went out for a ride on a smaller 10-metre displacement power cat we designed and from that, he commissioned his new 12-metre design.”

While there is nothing particularly new or radical about the design, there are some unique features.

“The client wanted something that he could trust and depend on to fulfil his future yachting aspirations,” explains Roger. “As with the original sailing yacht, the new power cat is specifically detailed around his requirements.

“Things like the very clever swimming diving platform that lowers down between the motors to form steps down to a wider bottom panel that allows easy access into the water for diving and launching a small RIB.

“It’s just the two of them, and the layout will be very comfortable for them to live aboard for extended periods through the summer as they have done with their yacht for many years.

“The choice to go with outboards was based on being able to explore areas they have previously not been able access with a deep draft keel, so adding a new dimension to their cruising ambitions.”

The choice to use the DuFLEX system came from the client seeing it for himself, visiting the 16-metre “Omahu” and speaking to its owner who had a previous sailing cat built out of DuFLEX and was extremely positive about the process.

“The preliminary design for the structure of “Celeste” was based on standard foam cored composite boat building methods. From that the options were costed up and DuFLEX won the job!

Cored with Divinycell foam, the DuFLEX panels in CELESTE have a combination of H80 and H100 densities in the hull shell. The hull bottoms are cored with 20mm H100 DuFLEX Strips that are laminated with a 460 grm unidirectional E-Fibreglass which will have an additional laminate applied on both sides, while hull sides are a mix of H80 thicknesses and laminated with double layers of 800grm quadraxial chosen to meet performance and engineering requirements.

Grant Symmans was a more traditional builder accustomed to using plywood, timber, and fibreglass skinning methods of construction, but he was intrigued with system and its multiple benefits – precision cut, time saving, labour saving and minimal waste.

Grant and his two co-workers are now well into the build.

“They made the large cabin top first and it went together very well and quickly, and they are now starting to plank up the first hull.”

“The client, whose father was a New Zealand timber boat builder and built many cold-moulded Kauri sailing yachts, was quite tentative about the process but is now also becoming much more relaxed and happy as he sees the boat coming to life.”

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Kingfisher boats is proud to have a range of sizes available to suit most needs. Click here to read more about the advantages of powercats

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The Kingfisher 620 Hardtop Powercat is pure magic. Safety, luxury, and adventure seamlessly merged, creating an unforgettable escape. From a cozy cabin to thrilling open seas, it's the epitome of boating perfection. For those craving an unparalleled experience, this Kingfisher is your dream come true. James Cook, Tauranga

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ROGER HILL DESIGN TAKES SHAPE WITH DUFLEX

The divinely named “Celeste”, a 12M Roger Hill designed power catamaran, is in build at G&T Marine, Auckland

This is the first-time seasoned boat builder Grant Symmans has worked with the DuFLEX panel system and Z-press from ATL Composites. The custom-built, displacement-hull powercat is on track for delivery by May 2023 to an experienced owner looking for volume and ease of cruising.So far, according to Grant, he has used the Z-press to join the DuFLEX panels for superstructure and cabin top.

“It’s a first for me,” he states. “Roger is a huge fan, so we went with it. It’s labour saving, comes as a kit, and the DuFLEX is lightweight and sturdy.”The 12m vessel is a “fairly straight forward” build, single level sedan with a beam of 4.8m.

“Using DuFLEX has made construction a simple process and at this stage we’re impressed with it. We’ll know more when we do the hulls,” Grant adds.

Using ATL’s Z-Press streamlines the composite panel joining process, applying heat and pressure to cure the epoxy adhesive on the Z-Joints. Joins cure fully in 7 to 20 minutes, depending on the ambient temperature, type of hardener, core type and thickness of the panel.

Roger Hill, specialist power multihull designer, says the client sought a well-appointed powercat for “the next phase of his cruising lifestyle”.

“I have always said that these displacement hull power cats we design are ‘sailor’s power boats’,” he explains. “That is, when you have been a yachtie all your life and you’re facing the unavoidable ravages of time on your old body but don’t want to give up boating, these cats are a good option!

 “They cruise most economically around 14 to 15 knots, or about twice the speed you have been used to going all of your previous boating life, and they are really fuel efficient. Also, they will motor directly into any head wind and nasty sea state without spilling your drink, or leaning over.”

Fortuitously, the client is Roger’s very first when he struck out on his own and established his design firm 27 years ago.

While there is nothing particularly new or radical about the design, there are some unique features.

“The client wanted something that he could trust and depend on to fulfil his future yachting aspirations,” explains Roger. “As with the original sailing yacht, the new power cat is specifically detailed around his requirements.

“Things like the very clever swimming diving platform that lowers down between the motors to form steps down to a wider bottom panel that allows easy access into the water for diving and launching a small RIB.

“It’s just the two of them, and the layout will be very comfortable for them to live aboard for extended periods through the summer as they have done with their yacht for many years.

“The choice to go with outboards was based on being able to explore areas they have previously not been able access with a deep draft keel, so adding a new dimension to their cruising ambitions.”

Cored with Divinycell foam, the DuFLEX panels in Celeste have a combination of H80 and H100 densities in the hull shell. The hull bottoms are cored with 20mm H100 DuFLEX Strips that are laminated with a 460 grm unidirectional E-Fibreglass which will have an additional laminate applied on both sides, while hull sides are a mix of H80 thicknesses and laminated with double layers of 800grm quadraxial chosen to meet performance and engineering requirements.

Grant Symmans was a more traditional builder accustomed to using plywood, timber, and fibreglass skinning methods of construction, but he was intrigued with system and its multiple benefits – precision cut, time saving, labour saving and minimal waste.

www.powercatsnz.com

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