The MAGLift™ Rotor Stabilizer uses the “Magnus Effect,” where a spinning object is moving through a fluid, creating differential pressure and hence lift force. It is the lift forces that create stability, particularly at slow or zero speed, when a vessel is most susceptible to rolling.
For maximum roll reduction, the MAGLift™ is mounted at the turn of the bilge with the rotor oriented perpendicular to the vessel hull during underway operations. The rotor spin direction and speed are altered during operation, as needed, to obtain optimal performance. The orientation and spin functions are precisely managed by Quantum’s hydraulic and electrical control systems. When the system is not in use, the rotors are stowed neatly, parallel to the vessel hull, reducing appendage drag and minimizing the impact on the vessel’s immersed dimensions.
In underway mode, the rotor is deployed to preset perpendicular position, and the righting force direction is altered by simply changing the direction of rotor spin. In addition, the MAGLift™ rotor stabilizer has the highest lift to weight ratio.
When properly sized and operating within acceptable vessel speeds, rotor stabilizers provide exceptional hydrodynamic efficiencies compared with other stabilizer systems. Additionally, each rotor can work independently. In addition, the system comes with seven sensors, used to monitor the rotor’s position, angular velocity and rotation speed at all times.
In recent years, the popularity of the MAGLift™ Rotor has gone well beyond our expectations, particularly in the 100m+ market when paired with a set of XT™ Fins. The performance at all speeds, slow, zero and >14 knots is unprecedented.
Advantages & Features
Ability to deliver remarkable roll stabilization at relatively low vessel speeds (<14 knots) based upon vessel specifications. The rotor spin direction and spin speed are altered during operation, as needed, to obtain optimal performance. To minimize appendage drag, the rotor stows neatly, parallel to the vessel hull, when the stabilizers are not in use.
Once the rotors are ready for installation, this system requires minimal disassembly. The system can accommodate different versions of a hull pocket or simply stowing the rotor along the hull to save in customized hull fabrication.
The retractable capability essentially eliminates the rotor as an appendage, therefore reducing the drag and optimizing underway, high-speed performance.
In addition, “haul-outs” are simplified and the potential for stabilizer damage is greatly reduced when the rotor is retracted.
Gallery
The ML220/380/460/540/600 Systems are designed to provide maximum energy transfer in terms of lift force. This is a phenomenon called the “Magnus Effect” where a rotating cylinder creates lift proportional to the speed and direction of the rotation. It is ideal for slow/loitering and zero speed applications. The unit is a compact rugged design, built to withstand the most demanding military and commercial applications.
For maximum roll reduction, the ML Semi- Retractable System is mounted in the turn of the bilge with the rotor oriented perpendicular to the vessel hull during underway operations.
Depending upon the requirements and budget, the system can accommodate the following hull designs:
Note: The semi pocketed design has been proven with various computational models to have the least resistance, and therefore if often recommended by Quantum.
Benefits
Designed using the latest technology and high-quality materials, the ML Semi-Retractable Series system offers the best performance of any system, especially where significant roll reduction is required at loitering speeds. In addition, the system comes with seven sensors, used to monitor the rotor’s position, angular velocity and rotation speed at all times.
The unit provides smooth power transfer from the ship’s hull to the rotor via precision roller bearings used in both the spin drive shaft and the main shaft.
By varying the RPM and direction of rotation of the tube, the lift force can be controlled with razor sharp precision, resulting in instantaneous response.
The rotor’s hydraulic system is equipped with an automatic retract mechanism to allow the rotor to swiftly stow in case of unexpected impact during operation. Should impact occur, the rotor section penetrating the hull, is designed to never break away, to ensure safety and hull preservation. While not in operation, the rotor is safely stowed along the hull, where it presents minimal possibility of impact. This is a ideal for a vessel requiring Ice Classification.
