Designed by Cor D. Rover, the Jetten 65 is a 19.3m motoryacht currently under construction. The motoryacht features Van Oossanen’s fast displacement hull (FDHF) and its patented Hull Vane, a fixed foil that is placed below the stern of the vessel to save fuel and improving seakeeping.

Jetten 65

New Jetten 65 with Hull Vane will make her debut at the Dusseldorf Boat Show 2017

Van Oossanen has unveiled details of its collaboration with Jetten Shipyard for the construction of the newbuild Jetten 65. The Dutch naval architecture and hydrodynamics specialist says the project creates a new concept for owners that favour the aft cabin yachts.

Pencilled by Dutch yacht design studio Cor D. Rover, the Jetten 65 is a 19.3m motoryacht featuring Van Oossanen’s fast displacement hull (FDHF) and its patented Hull Vane, a patented fixed foil that is placed below the stern of the vessel to save fuel and improving seakeeping.

In addition of being responsible for the complete naval architecture, Van Oossanen also delivered the engineering and the cutting files package of this full aluminium yacht, of which the building process started in June.

The Jetten 65 is equipped with two 550 HP Cummins engines and Van Oossanen’s patented Fast Displacement Hull Form (FDHF), allows the yacht to reach 20 knots.

The Van Oossanen’s patented Hull Vane has been added to the design, following the explicit preferences of the owner Paul Klaassen, who is a big fan of foils and bringing new technology to boating.

Klaassen already started with improving sailing 20 years ago. He comments: “Back in 1996, I put a large foil and twosmall ones on my 64 foot. It had a very positive effect as it lifted the boat 18 inches, from 38-inch draft, and increased top speed by about 30% from 30 to 40 knots. Problem was the builder never built more of them and closed. As they said about Edmund Burke: he was usually right, but right too early!”

Van Oosannen explains that apart from 10% fuel savings at the yacht’s cruising speed, the Hull Vane also reduces the pitch motions of the yacht, making her a real explorer companion for yacht owners looking for the highest levels of onboard comfort.

To indicate the benefits of applying Hull Vane, Van Oossanen simulated the yacht design in the maximum wave conditions typically encountered on the Dutch inland waters, with the help of computational fluid dynamics.

The test showed over 7% less heave motions, 13% less pitching, over 10% less vertical accelerations of the aft deck, and an overall reduction of resistance of almost 11%.

Construction of the new Jetten 65 started in June 2016. The yacht is scheduled to be presented at Boat Dusseldorf in February 2017.