The Netherlands’ Hull Vane underwater spoiler showcased at Seawork
The Netherlands’ innovative underwater spoiler, the Hull Vane® will be showcased at Seawork. Hull Vane® is a patented fixed foil located below the stern of a vessel, providing fuel saving, reduce emissions, improve sea-keeping and crew comfort.
The Hull Vane® influences the stern wave pattern and creates hydrodynamic lift, which is partially oriented forward. This results in a reduction of the vessel's resistance. The performance of the Hull Vane® depends on the vessel length, speed and hull shape in the aft sections, and ranges from 5 to 15% for suitable vessels. In specific cases, savings up to 20% are possible.
The Hull Vane® was invented by Dr. Ir. Pieter van Oossanen, and is protected by patents in all major shipbuilding countries. Established by the Netherlands-based Van Oossanen, a household name in ship optimisation and naval architecture, Hull Vane B.V. began operating as an independent company in 2014.
The Port of Rotterdam’s new patrol vessel, the 25m RPA8 features Van Oossanen’s Fast Displacement Hull Form (FDHF) together with an underwater spoiler, the Hull Vane®. The ship will consume less fuel than 60% of her predecessors, when carrying out the same tasks and creates significantly less wash when cruising at 15, 25 or 35 km/h. The fuel consumption at 20 km/h is only 26 litres per hour, whilst remaining extremely manoeuvrable.
Niels Moerke, Managing Director of Van Oossanen and Hull Vane BV comments, “Fast vessels need some form of lift in the aft of the vessel to be efficient at high speeds. You can generate this lift with the hull, by creating a hard chine planing hull form, or with hull appendages such as interceptors and trim wedges. In our experience however, the most efficient way to create this lift is with a submerged wing at the transom. This allows us to design the vessel to be much more efficient at the cruising speed of 20 km/h, while still achieving a maximum speed of 35 km/h.”
“RPA 8 is a good example of what can be achieved when a ship is designed for efficiency over the entire operational profile. We hope to retrofit a Hull Vane® also to similar existing ships.” RPA 8 is the eighth vessel to be equipped with a Hull Vane®, and ten other ships which will have a Hull Vane® are currently under construction.
The Hull Vane® can be used on power and sail craft, from commercial workboats through to superyachts.
Niels Moerke looks forward to showcasing the Hull Vane® in July, “Seawork works really well for us in developing the commercial marine and workboat market. Seawork’s steadily growing audience is exactly what we serve. Plus, combined with the core workboat market, Seawork’s new superyacht build, rebuild and repair trail will enhance both the exhibition and our business.”