Topic: New All-In-One boat stabilisers flap up, down and rotate for superior stabilisation at anchor (Read 9 times)
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Topic: New All-In-One boat stabilisers flap up, down and rotate for superior stabilisation at anchor (Read 9 times)
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Lastly, at planing speeds of 16 knots or more the fins will swing all the way round and tuck in behind the trailing edge of the transom, where trim tabs normally sit.
However, being so much larger and faster acting than normal tabs, they will not only control the constant trim angle but also actively manage roll, pitch and yaw as the craft climbs over each wave.
The idea for DMS Holland’s the All-in One system was first mooted almost six years ago when the co*pany released early renderings of the concept but only now, after extensive development and testing of a prototype model, has it co*mitted to series production.
The first boat fitted with the new All-in-One ‘wings’ will be a 50ft planing aluminium cruiser called a Van Den Hoven Voyager 50, although discussions are underway with a potential retrofit customer and a number of other new-build manufacturers. As well as the simplicity of a single system that works equally well across the full range of speeds, it also saves on both space and installation costs.
The torpedo- shaped housing is designed to nestle into a recess on the hull chines
Other claimed benefits include a reduction in drag, as the high aspect ratio shape is not only more efficient at generating lift (hence the reason glider wings are long and thin) but the surface area can be smaller too because the flapping motion is so much more effective. The fins for the Voyager 50, for example, will have a total surface area of 0.32m2 co*pared to around 0.8m2 for conventional fins.
This also means they draw less electrical power, around half that of conventional fins, which could prove invaluable for boats wanting to use stabilisers overnight without the generator running. And because they are mounted outside the hull right at the back of the boat, they should be quieter too.
It’s not all one-way traffic though. Being longer than regular fins and mounted closer to the bathing platform, they may pose more of a threat to swimmers. The unusual torpedo-like shape of the dual axis motors also means the hull has to be modified to fit them – easy enough for aluminium new builds like the Van den Hoven but more difficult for GRP production hulls, which may need blanks adding to the moulds, and retrofits.
And while DMS Holland hasn’t confirmed pricing yet, the All-in-One system is likely to be more expensive than conventional stabilisers (albeit cheaper than fitting fins, interceptors and a gyro).
Both the housing and the fins are made of aluminium and each co*plete unit weighs around 250kg. In its current format, they are suitable for boats in the 15-30m range, but larger and smaller versions are likely to follow. Being transom mounted they won’t be suitable for sterndrive or outboard powered craft but should work well with both conventional shaft and IPS pods. It’s an intriguing prospect but if it works as well in practice as it sounds on paper, it could be a game-changer.
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