Heesen Yachts has announced that the world's first Fast Displacement motor yacht equipped with hybrid propulsion was delivered to her Owner in international waters.
HOME (formerly Project NOVA) - a 50m all aluminium motor yacht below 500GT with shallow draft - underwent intensive sea trials in the North Sea for five days in calm sea conditions with waves of up to 0.5m and light breeze.
The results are impressive: not only has HOME easily exceeded her contractual maximum speed of 16.3 knots in the traditional diesel engine mode, but also in the hybrid 'quiet mode'. Thanks to two 127kW water-cooled DC electric shaft motors, she also exceeded the predicted speed of 9 knots with noise and vibration levels well below the Specification levels.
HOME is not only extremely quiet, she is also highly fuel efficient. At 12 knots, she has a fuel consumption of 98 litres per hour (excluding generators) and at 10 knots in hybrid mode this further reduces to a staggering 45 litres per hour, which for a 50m yacht, displacing 295 tons and with a Gross Tonnage of 499 is an outstanding achievement. Heesen is also renowned for its meticulous attention to weight reduction, and HOME is an effortless embodiment of this; being lighter than predicted, she is the perfect demonstration of Heesen's signature capabilities.
This impressive performance is achieved with just two MTU 12V 2000 M61 engines of 600 kW each, which are smaller than those typically fitted on a yacht of this size. This is once again proof of the remarkable efficiency of the Fast Displacement Hull form devised by van Oossanen Naval Architects, engineered by Heesen's in-house specialists, and perfectly executed by Heesen's talented team of welders.
HOME has also exceeded her range predictions measuring an impressive 4,250 miles at 12 knots - 500 more than specified and this achieved with a fuel capacity of just 45,000 litres, further underlining the remarkable efficiency of the Fast Displacement hull.
For more see Electric Boats and Ships 2017-2027
Source and top image: Heesen Yachts