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Superyacht Adastra, 42.5m Power Trimaran.Described by Boat International as "one of the world's most amazing super yachts, that could spell the future for efficient long range cruising", the striking 42.5m Trimaran Adastra was launched on the 11th of April 2012 in China for Hong Kong clients Anto and Elaine Marden. Adastra is the result of meticulous attention to detail and innovative design to create a yacht that meets the needs of a very experienced ocean voyaging couple and their family, and to provide the level of comfort and style expected in a yacht of this class and size. No effort has been spared in the challenge to produce a beautiful yacht that has exceptionally low fuel consumption and yet provides excellent sea keeping qualities and luxurious accommodation. Measurements taken during the sea trials show that her fuel consumption at 10.5 knots is as low as 17 litres per hour when carrying 10% fuel and water. At cruising load (20 tonnes fuel and water) she uses just 25 litres per hour therefore on delivery trips her range is 10,000 miles starting with 30,000 litres of fuel. Her slender hulls and streamlined exterior allow her to travel faster in the open ocean and at 17 knots she has a 4,000 mile range so can comfortably cross both the Atlantic and Pacific oceans at hi-speed. Adastra takes the power trimaran concept further than has ever been attempted before, previous vessels like Earthrace and Cable and Wireless were stripped out record breaking machines. The challenge of turning this concept into a viable luxury yacht has led us to further research and develop new thinking on stability and comfort at sea for this type of craft. Extensive tank testing and radio controlled model tests in waves have been carried out to analyse stability and performance. Outrigger height has been optimised for ease of motion at sea, and a new outrigger shape has been developed to increase stability in waves. We have undertaken state of the art structural analysis of all the major components in the yacht in order to achieve the light weight required for very low fuel consumption. The deck and superstructure is constructed from carbon fibre with Nomex honeycomb core, the hull is glass/kevlar foam sandwich and the interior is light weight oak cabinetry using honeycomb panels. To help reduce weight further, virtually every aspect of the boat is custom built. This includes carbon fibre hatches, toilets, portlights and ladders, which are all built specifically for the vessel.
Aerodynamics and hydrodynamics above the water line were carefully considered as we developed the overall exterior shape and we kept the boat streamlined both for air and water passing over the structure. The smooth seamless, unbroken surfaces also help to reduce weight as the outer-skin forms part of the structure to absorb torsional loads. Adastra's 16 metre beam creates a spacious saloon area on the main deck which offers superb views through a panoramic window and accommodates a lounge area, dining table and navigation station. A forward facing door through the saloon window gives easy access to a large sunbed on the foredeck. The aft deck has a sofa and bar area to port and a dining area to starboard, further aft there is space for a 4.9 metre tender and directly below is a garage which can store a 3.1 metre tender. The garage door has been designed to fold out and create a large dive platform. The main helm station, which has seating for two, is positioned in a raised pilot house situated between the aft deck and the saloon area and forms part of the cross beam structure. Extra space has been created below deck by slightly flaring the central hull just above the waterline. This area has been split into two sections with a full-width master cabin located aft with access from the deck saloon, and two further guest cabins, accommodation for the crew, and the galley located forward of the engine compartment. Adastra offers comfortable accommodation for nine guests and up to six crew members. The anchoring system is unique with three anchors driven by carbon fibre drum winches run by hydraulics. The primary anchor is a custom 130kg Bruce style anchor that deploys out of the starboard wing. The bow anchor is 80kg and deploys out of the bow with a carbon fibre arm. The third anchor is 60kg which deploys out of the port wing and is used as a stern anchor. Adastra in Malaysia Adastra has now completed 4000 miles through the Phillipines, Indonesia, and up to Phuket in Thailand. The owner says she is a joy to be aboard. Seas up to 12 ft (4 m) have been encountered and the yacht has performed well. Click on a thumbnail for a larger image          
Adastra Exterior Details Click on a thumbnail for a larger image           
Adastra in Hong Kong Click on a thumbnail for a larger image      
Adastra Launched After 4 years in build by McConaghy boats in Zhuhai China, the fuel efficient 42.5 m Trimaran Adastra has been lanched into the Pearl River. Click on a thumbnail for a larger image         
The Shuttleworth Yacht Design team for Superyacht Adastra From left Orion, John, and Sky Shuttleworth
Rendered Images
General arrangement drawings
Interior. Rendered images. © Jepsen Designs. Hong Kong.
Adastra Interior Images Click on a thumbnail for a larger image small.JPG) small.JPG)       small.JPG) 
Adastra under construction in McConaghy yard Zhuhai China
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Adastra, the 42.5m power trimaran wins "Most Innovative Design" at the 2013 World Superyacht Awards.
"Adastra was very different. A remarkably low hull weight of 52 tonnes,
a usable volume of 132 GT and a top speed of 23.2 knots, combined with her dynamic exterior shape and extremely
low fuel burn of around 20 litres/hour at her economical 10.5 knot cruising speed, led the jury to award a judges’ commendation
for extremely innovative design." Shuttleworth Design was responsible for her exterior design, naval architecture, structural design and interior layout Adastra is chosen as finalist in 4 categories in the Showboats Design awards 2013.
1. Exterior Design and Syling with Orion Shuttleworth Design.
New video of Adastra at 22 knots.
News in from Anto Marden after the first 2500 miles of his voyage. " We have been onboard on this leg for 12 days from Cebu, Ternate, Bitung and now Raja Ampat. She's behaved well. including a bit of bad weather - 4/5 on the beam. Basically she is a Joy to be aboard."  Adastra in Raja Ampat - September 2012. Photo taken by Christian Kaufmann - Raja4Divers. www.raja4divers.com Adastra completes maiden voyage from Hong kong to the Philippines Anto Marden reports, "She seems to be a very good sea boat. She has what can only be described as a stately motion." Adastra wins "Best Design" at Asia Pacific boating awards in Hong Kong. John Shuttleworth Yacht Designs Ltd receives "Most Innovative Company" award at the China (Shanghai) Boat Show. John Shuttleworth Yacht Designs Ltd, and the companies involved in the design and build of Adastra have collectively been awarded the title of "Most Innovative Company" last week at the China (Shanghai) Boat Show. The unique nature of the design has been recognised by a panel of judges drawn from local and international Media and Marine Industry Professionals. ADASTRA build and launch videoVideo of Adastra being built and launched, with brief interviews with the owners, the builders, and John Shuttleworth
McConaghy boats took this short video of Adastra off the coast of China. Loaded with 17800 litres of fuel, 2750 litres of water and 17 people, she is doing 22 knots.
After 4 years in build by McConaghy boats in Zhuhai China, the fuel efficient 42.5 m Trimaran Adastra has been lanched into the Pearl River. Naval Architecture, Structural Design and Exterior Design - John Shuttleworth Yacht Designs LtdJohn Shuttleworth Yacht Designs Ltd. is based in West Sussex, England and has gained a reputation for designing fast, strong, and safe boats. In the 1980s Shuttleworth's design team developed the concept of "Integrated Structure," resulting in boats that were lighter, stiffer, and stronger than any previous multihull designs. Their designs became consistent race winners, and several have broken and still hold some of the toughest long-distance ocean sailing records. Many of Shuttleworth's racing and cruising multihulls have completed round the world voyages. They continue to develop and use this technology to design both sailing and power multihulls, where significant savings in fuel consumption and increased range can be achieved. Always working closely with their clients to achieve their wishes, Shuttleworth Designs have kept to their philosophy of "form follows function" which has resulted in a unique style that can be recognised by anyone who is familiar with their work. Exterior Design and Design Project Management - Orion Shuttleworth Design LtdOrion Shuttleworth Design Ltd specialises in yacht design and visualisation for a variety of clients including yacht owners, naval architects, engineers, boat builders and manufacturers. The company offers a wide range of services including yacht exterior and interior design and styling, custom component design, rendering, animation, 3D modelling and design project management. With over 10 years' experience in yacht design, Orion has worked on a diverse range of projects from production motor yachts to high performance sailing multihulls. In 2009 he joined the ground breaking and multi award winning 'Adastra' project, working closely with the client until the launch in 2012. The company is now focused on the design of multihull and monohull, motor and sailing yachts, as well as visualisations for a variety of industries. Go to www.orionshuttleworth.com Structural Design – Asta LtdAsta is a specialist composite engineering company providing working solutions for designers and fabricators in all applications of structural FRP. Their clients are: yacht designers, architects, civil engineers, boat builders, and designers of lightweight structures. They provide: stress analysis, FEA, production engineering, composite solutions, construction drawings and reports. In many cases the structural engineering has been unrestricted by codes or regulation and as a result genuinely innovative solutions have been developed. Builder - About McConaghy Boats For more than 40 years McConaghy has been at the cutting edge of race yacht construction; leading the way in research and application
of new materials and technologies to build some of the strongest, lightest Ð and most successful Ð racing yachts ever launched.
But that is only part the McConaghy success story. With manufacturing bases in both Australia and China, McConaghy now deploys its wealth
of talent and its mastery of laminated construction techniques across a number of different divisions, extending the strong commercial
platform that has allowed it to defy industry trends and continue to thrive. Interior Design - Jepsen DesignsJepsen Designs is a Hong Kong-based architectural and interior design Firm. Although not exclusively working on yacht interiors, Jepsen Designs has worked with clients, naval architects and boat yards around the world for the past 20 years. Projects have varied from the interior design of modern sailing and motor yachts to the restoration of classic motor launches to the conversion of Chinese wooden junks into high-class pleasure vessels and house boats. Whilst drawing from Scandinavian modern design principles fused with Eastern accents, the Jepsen Designs team has developed versatility in creating designs and styles to match unique client expectations. Years of sailing and racing experience within the team further bolsters Jepsen Designs' understanding of the technical and functional challenges a naval project offers. Jepsen Designs is today widely acknowledged as a well-established interior design firm in Hong Kong.
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