XT™ Fin
XT™ is the most popular system to date. The term XT™ refers to “extended,” whereby the main stabilizer fin houses another fin or foil, designed to extend or retract based on the speed of the vessel. When extended for Zero Speed™ performance, it adds 30% more surface area that generates 100% more lift. It is lift that creates stability. In underway mode, the foil retracts, reducing the surface area or drag, reducing vessel roll.
Quantum's popular XT™ (extendable) Fin Stabilizer offers exceptional Zero Speed™ and underway performance based on speed and the positioning of an internal foil.
Quantum’s XT™ stabilizer fin is designed with a foil that extends and retracts based upon the speed of the vessel. For Zero Speed™ operations, the foil extends, adding 30% more surface area to maximize performance. For underway, the foil retracts into the main fin housing, reducing the surface area and minimizing the drag for greater efficiency.
In most cases, a single pair of Quantum XT™ stabilizer fins can provide the equivalent performance to two sets of conventional fin stabilizers. Imagine a 2-fin XT™ not only delivers notable installation and power-related cost savings, but also reduces the internal footprint and maintains performance comparable to a 4-fin configuration. Add to that, less equipment to maintain!
Advantages & Features
The XT™ system is designed with an inner foil that extends for zero speed performance. When the foil is extended it adds 30% more surface area and that additional surface area, generates 100% more lift force. Lift creates stability!
A vessel is most susceptible to roll motion and passenger discomfort at slow or zero speed. During underway operations, when there is a high flow of water over the fins, less fin area is required. The foil is then retracted, reducing the size of the underwater appendage, which also minimizes the drag for better fuel efficiency.
Quantum’s stabilizer fins are customed designed, with innovative features such as minimal hull-to-fin clearances and trailing edge vortex generators. These elements help to reduce harmonic distortion and cavitation that can produce noise and vibrations while underway. In addition, the hydraulics are protected by sound shields and inline silencers that are also effective in reducing the potential hydraulic noise.
The underwater hydraulic cylinder is powered by a hydraulic system that is independent from the main hydraulic system. Any components, requiring lubrication that are positioned below the waterline, are specified to use “safe oils,” EAL (Environmentally Acceptable Lubricants), avoiding any negative impact to the sea.
Gallery
| XT™ Fin | QC1200 XT™ | QC1500 XT™ | QC1800 XT™ | QC2200 XT™ | QC3600 XT™ |
|---|---|---|---|---|---|
| Typical Vessel Length* | 30-50m (100-170ft) | 36-55m (118-180ft) | 50-70m (164-230ft) | 65-80m (200-250ft) | 100-152m (330-500ft) |
| Fin Retracted Size Range** | 1.0-1.6m² (10-13ft²) | 3.0m² (33ft²) | 3.4-4.0m² (37-43ft²) | 4.1-6.0m² (44-65ft²) | 11.5-15.0m² (124-162ft²) |
| Fin Extended Size Range | 1.3-1.9m² (14-20ft²) | 4.0m² (43ft²) | 4.4-5.2m² (47-56ft²) | 5.2-8.0m² (56-86ft²) | 15.0-19.5m² (162-210ft²) |
| Retracted Aspect Ratio | 0.36-0.40 | 0.36-0.40 | 0.36-0.40 | 0.36-0.40 | 0.36-0.40 |
| Retracted Balance | 18-20% | 18-20% | 18-20% | 20% | 20% |
| Dimensions | Inquire | Inquire | Inquire | Inquire | Inquire |
In the case of impact or fault, the system can be operated as a conventional fixed fin stabilizer with the foil mechanically retracted in the pocket. Should damage occur, requiring emergency maintenance between haul-outs, the fin is designed for full in-water serviceability.
Nearly all of Quantum’s standard fixed fin systems can be upgraded to an XT™ Fin. Additionally, the XT™ Fin can be refitted on an existing Quantum System that may require the replacement of other components and parts with minimal structural modifications.
