DMS MagnusMaster
For low-speed cruising and semi-displacement yachts up to 30 metres
More comfort and safety at sea
You cannot compare the MagnusMaster with other conventional stabilisation systems due to its technical innovation and better results. This latest generation of rotor stabilisers provides roll damping at low speeds of 3 to 12 knots on yachts up to 30 metres. At speeds above 12 knots, the Magnus effect no longer increases and therefore the DMS MagnusMaster automatically retracts.
When retracted, the rotors remain largely within the turbulent boundary layer of the vessel, meaning resistance is negligible.
The Magnus Effect
It is a work of high-quality technology based on a universally acknowledged law of nature: the Magnus effect, that works in both liquid and air, was discovered and documented by Heinrich Magnus. DMS Holland has been able to optimise this effect by developing and applying advanced new techniques.
DMS Holland has been able to optimise this effect by developing and applying advanced new techniques. To guarantee durability and continuity, the system uses electronic components from the well-known German brand Lenze, including electric motors, displays, drives and servo motors.
How does the Magnus effect work?
The Magnus effect is the name given to the physical phenomenon that affects the trajectory of a spinning object in liquid or air. It is a combination of different effects, including the Bernoulli effect and the formation of boundary layers in the viscous medium around the moving object. It is named after the German physicist Heinrich Gustav Magnus. He experimentally investigated the phenomenon in 1852 and in doing so, explained the trajectory deviation that occurred to spinning bullets. In 1877, Lord Rayleigh drafted a theoretical explanation to explain the trajectory of tennis balls with “spin”.
A fast rotating and fast linear moving object creates a kind of vortex of rotating air around it and behind it, creating a difference in pressure on the opposite sides. On one side of the object, the vortex moves in the same direction as the air flow. On the other side, the surface and the air ‘clinging’ to it, move against the linear airflow. The air pressure becomes lower than the atmospheric pressure by a factor proportional to the square of the speed and there will be an effective force perpendicular to the direction of movement. It resembles the behavior of an airfoil in a laminar air flow.
Advantages of the MagnusMaster over conventional fin stabilisers:
For New Build or Retrofit Installation
DMS MagnusMaster stabilisation is increasingly becoming the system of choice for many new build production motor yachts as well as for one off specialist projects. Whether a single, twin or even 4 rotor system (depending on the length and weight of the boat), shipyards are finding its versatility of positioning, compact size and ease of installation makes it a far more viable option than many other fin or gyro systems. Owners are not only attracted to MagnusMaster for its superior low speed performance, but also for its quality, reliability and pure simplicity of operation when they want to use it.
Thanks to all the above factors, MagnusMaster is also ideally suited to retrofit applications and, as an all electric system, there is no need to install complicated hydraulic packs. It is so compact and versatile in its positioning that a suitable location can almost always be found without major upheaval to the engine room or interior. In most cases installation from start to finish can be completed in a matter of a few weeks with the minimal of disturbance to existing systems.
The DMS team recently completed the installation of a Twin Rotor DMS MagnusMaster system on a steel hulled Cape Horn 58 Trawler based in the USA (San Diego). The owner spent some considerable time researching stabilisation and selected DMS MagnusMaster for its superior performance at low cruising
speeds, all-electric operation, compact size and of course simplicity of operation.
MV Astra took on the unparalleled challenge of a ‘Southern Capes Circumnavigation’, a first for any owner captained, full displacement motor yacht under 24 m! Equipped with a 4 Rotor MagnusMaster system, the video shows the effectiveness of the system and is a testament to the quality and reliability of DMS MagnusMaster with over 30,500 miles completed without any problems.
“The stabiliser system needs a special mention, they really proved themselves. Although they were reserved for rough conditions, in the extreme conditions Astra encountered you might have questioned if they were really on or even still attached to the hull. You only had to turn them off for a moment to experience getting flung around like a rag doll to prove how well the system was working. Without this system, re-fuelling from deck tanks would have been impossible in some of the seas Astra encountered and would have resulted in serious injury or the increased risk of losing a crew member over the side.”
Paul - Chief Engineer MV Astra
In July 2021 MV Monara departed on a world tour. Before starting this adventure the owners decided it was vital they significantly improve roll reduction capability to make life onboard safer and much more comfortable. After removing the existing small fins from the steel hull, a twin MagnusMaster all-electric rotor system was fitted. See the results for yourself whilst enjoying this beautiful video.
Specifications
- Maximum Power: 1500W (per rotor)
- Average Consumption: 1000W (per rotor)
- Voltage: 230 Volt Single Phase AC + 24 Volt DC
- Rotor Material: Carbon
- Elbow Material: Steel with Advanced Coatings
- Shaft Material: Stainless Steel
- Integral Manual Emergency Operation
- Single Rotor Installation up to a max of 20 Tonnes
- CAN Bus Operation
- NMEA Interface with Raymarine
Installation of a DMS MagnusMaster
MagnusMaster Demonstration
System in action
Demonstration of MagnusMaster in operation and explanation
Boating New Zealand sea trial
Testimonials
