WAGENINGEN _ Van Oossanen Naval Architects’ patented Fast Displacement Hull Form is enjoying growing popularity among builders of yachts, small and large.
“We see growing demand for efficient, energy-saving and comfortable hulls,” says Marketing Director Perry van Oossanen.
“There is more awareness of sustainability these days. Typically, fast yachts have a hard chine shape that do well at high speed but have poor fuel efficiency at cruising speed. The Fast Displacement Hull renders good high speeds “and, at the same time, excellent efficiency at cruising speeds,” says Van Oossanen. “It provides the best of both worlds.”
His studio developed the FDHF a decade ago. It benefits yachts of 15m and longer. So far, there have been some 18 FDHF launches in the Netherlands and abroad. “Another 20 FDHF yachts are under construction,” Van Oossanen tells DutchYachtBuilding.
He also markets – for both the yachting and commercial sectors – the Hull Vane®, a hydro wing below the transom that gives extra lift. “You need not combine a Hull Vane with a FDFH yacht, but if you do you’ll benefit from extra efficiency and comfort,” says Van Oossanen.
Van Oossanen provides naval architecture and engineering to Dynamiq Yachts which is building the 41m GTT-135, the Monaco yard’s biggest launch to date. It has an FDHF hull that achieves a 20kn top speed and a transatlantic range of 3,000 nm at 12 knots. The Hull Vane® will provide a 20% reduction in pitching and reduce resistance by as much as 30%.
This Spring, Dynamiq unveiled the 33m G330 explorer yacht that will have a top speed of 16 knots and use up only 10 liters per hour while doing 10 knots. “For the G330, we developed a special edition FDHF with a wide body, long roll period and an exceptional top speed for this size and type of vessel,” says van Oossanen. “By reducing pitching, our patented Hull Vane adds efficiency and even more comfort.”
Heesen Yachts of the Netherlands is building an 80m, FDHF aluminum yacht with a 20kn cruising speed and a top speed of ca. 30 knots. Heesen CEO Arthur Brouwer, “We had to think long and hard about how to bring the necessary stiffness to the design without adding too much more weight.” Working with Van Oossanen, it came up with a “backbone” by way of a narrow, stem-to-stern aluminum cage running the length of the bilge.
Van Oossanen was founded in 1992 by Peter van Oossanen, Perry’s father, after 20 years at the Maritime Research Institute of the Netherlands. From 1981 to 1983, his research for Australia II, the America’s Cup challenger in those years, led to the winged keel design that sent the cup to Australia.