Heesen Yachts has revealed that the hull and superstructure of YN 17850 Project Nova have been joined together at its yard in Oss. The 50m yacht displaces 315 tonnes with a gross tonnage of 499. In ‘boost mode’ the yacht will have a top speed of 16.3 knots and will have accommodation for 12 guests.

The shipyard has taken Van Oossanen’s patented Fast Displacement Hull Form (FDHF) and with Project Nova, intends it to be the first of its kind equipped with hybrid propulsion.

The FDHF has had notable success at semi-displacement speeds where the resistance values displayed by the FDHF are 15 to 20% better than those of well-designed hard chine hull forms.

Heesen has been the first shipyard to apply the FDHF to superyachts, starting with the very successful 65m Galactica Star, and continued with 42m Alive, 55m Azamanta, and 50m Sibelle.

However the shipyard has decided with Project Nova not to focus on speed but instead on lower fuel consumption and silent cruising. At 12 knots Project Nova will have a fuel consumption of 98 litres per hour (excluding generators) and at 10 knots this will be reduced to a 57.5 litres per hour. Her cruising range of 3,750nm at 12 knots will be achieved with a fuel capacity of just 45,000 litres.

With her two water cooled DC electric shaft motors of 127 kW each, Project Nova can cruise at speeds up to 9 knots using the generators alone. At this speed the consumption is predicted to be only 45 litres per hour with very little noise.

Exterior lines have been contributed by long time Heesen collaborator Omega Architects with interior styling by Sinot Yacht Design.

It is undoubtedly a sign of Heesen’s continued success that the yacht is being build on spec. Heesen has ten yachts under construction with deliveries running into 2018. The yard considers the project to be “the next logical step” after using the FDHF to success.

SB understands that, demonstrating a few departures from trends of recent years, the yacht will not have a beach club but will instead feature a watersports room and sauna. A dedicated gym will be positioned ahead of the engine room and the tender will be recessed in the foredeck.

Project Nova is available for purchase and is scheduled to be delivered in Spring 2017 after intensive sea trials in the North Sea.

Van Oossanen Naval Architects will be talking to SB in the February issue about noise and vibration control.