Super-yacht Adastra by John Shuttleworth yacht designs

'Adastra' is a 42.5m power trimaran which was conceived for a couple (anto and elaine marden) for long range cruising. The yacht uses a trimaran shape that allows it to have multiple hulls. this is the second largest of its kind and can be controlled from a distance with an iPad. The superyacht's aerodynamics and hydrodynamics were carefully considered by John Shuttleworth yacht designs who have drafted a streamlined exterior body whose three hulls are slender in form. their shape ensures smooth and faster travel, allowing the vessel to move comfortably over water at hi-speeds, as is evidenced by its performance--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 only 25 litres per hour so that on delivery trips; her range is 10,000 miles starting with 30,000 litres of fuel; at 17 knots she has a 4,000 mile range.

An intense structural analysis of all of the major components of 'adastra' were taken to achieve the lightest weight possible required to establish its low-fuel consumption. Structurally this has been realized through a deck and superstructure made from carbon fibre, with a nomex honey comb core. the hull is a sandwich composition of glass and kevlar foam, while the interior is oak framework with cabinetry completed by honeycomb panels. in addition, all aspects of the boat have been custom built accordingly to further reduce the overall volume as seen for example in the carbon fibre hatches. the luxury boat's surface is a composition of seamless, unbroken surfaces, this outer skin forming part of the framework that absorbs torsional loads.

LOA: 42.5 m
beam: 16 m
hull draft: 1.12 m (1.6m to tip of rudder)
main engine: 1x caterpillar c18 -1150 hp @ 2300 rpm
outrigger engines: 2x yanmar 110hp @ 3200 rpm
generators: 2 x 36 kw custom in the outriggers linked to 110 hp yanmar engines, and 1x 26 kw northern lights in main engine room
owner and guest capacity: 9
crew: 5-6

A 16m long beam results in an expansive main deck offering panoramic views with a lounge area, dining table and navigation station. A forward facing door through the saloon window allows for easy access to the sun bed located on the foredeck. the afterdeck has additional seating as well as a bar, and space for a 4.9 metre tender with a garage directly below which can house a 3.1 metre tender, and whose door has been designed to fold out and function as a large diving platform.

The deck is constructed with carbon fiber with a nomex honeycomb core and the huss is a kevlar/glass combination. The interior is a beautiful lightweight oak design mixed with honeycomb panels. All of this keeps the weight down so the yacht can travel faster and longer. The yacht launched in april 2012.