Dutch shipyard Feadship has launched Savannah, an 83.5-metre (273ft) motoryacht. The yard explains that she is the first superyacht to feature an eco-friendly blend of single diesel engine, three gensets, batteries, propeller, azimuting thruster and a streamlined hull shape.
“Savannah is a yacht full of premiers,” emphasises Feadship director Henk de Vries. “As the first ever hybrid superyacht, she offers incredible flexibility in operations and loading of the power plant. The result is fuel savings of some 30% compared to the best boats that we have launched to date.”
In addition to the pioneering electro-mechanical propulsion platform Savannah features a floating superstructure, an underwater lounge, ‘open’ aft deck areas are some of the amenities onboard.
“It is not the individual technologies used on Savannah that are new in the yachting world – it is the way they have been combined,” comments the owner’s project manager, Ted McCumber. “The possibility to choose between diesel, diesel-electric or fully electric is truly exceptional. Moreover, Savannah is the first yacht in the world to be running with an azipull and a variable pitch propeller. Only Feadship engineering and the rich experience of this yard could have successfully concluded a project of such scope and vision,” McCumber continues.
Her design is inspired by the 2010 Feadship Future Concept Breathe. Savannah has a dynamic hull shape with a very fine entry, uses one efficient medium-speed Wärtsilä main engine instead of two higher-rev diesel motors, a single central propeller shaft installation on the centreline and three gensets.
Redundancy is ensured by fitting a large contra-rotating and azimuthing sternthruster just aft of the main propeller. The design of the aft ship allows for a propeller that is 40% larger than the norm. Combined with the power supplied by the thruster, the load on the propeller is only half that of a conventional twin screw yacht. This again results in a higher efficiency and fewer vibrations. In addition, Feadship says the large sternthruster also ensures excellent manoeuvrability in marinas.
Savannah will be made available on an exclusive basis for occasional chartering.