WAGENINGEN, July 2017 ~ Speaking of the America’s Cup … Van Oossanen has worked on half a dozen AC designs. One remarkable feat: the winged keel design by Piet van Oossanen that gave Australia the AC cup in 1983 ending decades of US supremacy. Since then, Van Oossanen has worked on countless sailing and motor yachts. Like the first Mulder ThirtySix that hit the water June 28 with a Van Oossanen-patented Fast Displacement Hull Form.
The 36m yacht has a custom-built interior, an aluminum hull, a continuous window line and an edgy plumb bow. Its FDHF gives it a smooth ride and saves fuel. Still, its twin 847 kW engines deliver a top speed of 16.8 knots.
The FDHF is efficient over the entire speed range, not just in a restricted speed interval around the top speed. Van Oossanen Managing Director Perry van Oossanen says his FDHF saves “10 to 15% at maximum speed in terms of fuel consumption. Compared to a semi-displacement hull this can be 20 or 30%.”
With a gross tonnage of just under 300GT, the Mulder ThirtySix, says Sales and Marketing Chief Nick Mulder, appeals “to owners and the charter market due to the most economic running costs for a yacht of this size.”
Van Oossanen FDHFs appear on yachts starting at 14m up and on superyachts. Clients include Heesen Yachts, Jetten Shipyard (Jetten Beach45, upper photo), Mulder Shipyard (Mulder ThirtySix, lower photo), Storms Yachts and others.
In the last 4 years, Van Oossanen has equipped 20 yachts with a Fast Displacement Hull. “We have another 10 or so under construction,” says Van Oossanen. “Apart from fuel savings and speed efficiency, “another Fast Displacement Hull advantage is comfort.”
Van Oossanen is working on an XL version, for yachts unhindered by gross tonnage boundaries. “Low-resistance hull forms in general will become more and more important,” says Van Oossanen.