Warum benötigen Sie ein Stabilisierungssystem an Bord?
Stellen Sie sich Folgendes vor: Sie sind auf einem Boot und plötzlich nimmt der Wind zu und die See wird rau. Das Schiff beginnt hin und her zu schwanken und man fühlt sich wie auf einer Achterbahnfahrt. Das nächste, was Sie bemerken, ist, dass Sie sich unwohl fühlen und wünschen, Sie stünden auf festem Boden.
Wir haben es alle schon einmal erlebt und sind uns alle einig, dass es keine angenehme Erfahrung ist. Doch die Auswirkungen eines instabilen Bootes gehen über die Seekrankheit hinaus. Stellen Sie sich vor, dass Teller und Tassen durch die Kabine fliegen, Passagiere Schwierigkeiten haben, sich auf dem Schiff zu bewegen, und Besatzungsmitglieder, die ihre Sicherheit aufs Spiel setzen, um alles unter Kontrolle zu halten. Es ist nicht nur unangenehm; es ist gefährlich. Deshalb ist ein zuverlässiges Stabilisierungssystem an Bord für jedes Schiff von entscheidender Bedeutung, egal ob es sich um eine Luxusyacht oder ein Arbeitsboot handelt. Es ist der Schlüssel zu einer reibungslosen und sicheren Fahrt, selbst unter den schwierigsten Bedingungen.
Die Entwicklung von Schiffen, die den Herausforderungen der Rollreduzierung gewachsen sind, ist eine komplexe Aufgabe. Das Rollen ist eines der größten Probleme, mit denen Schiffe auf See konfrontiert sind, und die Bewältigung dieses Problems erfordert fortschrittliche technologische Lösungen. Schiffsarchitekten stehen bei dieser Herausforderung an vorderster Front und nutzen modernste Technologie, um die Wellenbewegungen rund um den Schiffsrumpf zu untersuchen und Designs zu entwickeln, die die Auswirkungen des Rollens minimieren und so eine komfortable und sichere Reise für Passagiere und Besatzung gleichermaßen ermöglichen.
Bei Arbeitsbooten, die unter rauen Bedingungen eingesetzt werden, kann ein aktives Stabilisierungssystem den Unterschied ausmachen, ob die Arbeit sicher oder gar nicht erledigt wird. Ein stabilisiertes Schiff verbessert die Sicherheit und den Komfort der Seeleute erheblich, da das Rollen des Bootes sowohl unterwegs als auch vor Anker nahezu ausgeschlossen ist.
Verschiedene Methoden von Stabilisierungssystemen
Maritime Stabilisierungssysteme sind zu einem großen Geschäft geworden. Heutzutage können Sie zwischen mehreren Anbietern wählen, die unterschiedliche Methoden zur Reduzierung der Rolllast nutzen. Eine Stabilisierung der Rollbewegung kann bei herkömmlichen Schiffen durch eine Änderung der Rumpfform erreicht werden. Eine Reduzierung der Rollamplituden ist auch auf andere Weise möglich. Im Großen und Ganzen unterteilen wir Stabilisierungssysteme in zwei Kategorien:
Passive Systeme: Es ist keine separate Stromquelle oder spezielles Steuerungssystem erforderlich. Beispiele für passive Systeme sind der Bilgenkiel, Anti-Rolling-Tanks (passiv), feste Finnen und passive bewegliche Gewichtssysteme.
Aktive Systeme: Wenn die Gegenrolle durch bewegte Massen oder Steuerflächen erzeugt wird, die Kraft wie aktive Finnen, Anti-Roll-Tanks (aktiv), aktive bewegliche Gewichte und das Gyroskop nutzen.
Auf dieser Seite konzentrieren wir uns hauptsächlich auf aktive Systeme. Abhängig vom geplanten Einsatz und Bootstyp gibt es hauptsächlich drei Methoden, bei denen Sie zwischen Aktivtanks, Kreiselstabilisatoren und Aktivfinnenstabilisatoren wählen können.
Beim Entwurf einer neuen Yacht empfehlen wir, bei der Auswahl der Technologie die Vor- und Nachteile der verschiedenen Optionen sorgfältig abzuwägen. Stellen Sie sich zunächst die folgenden Fragen:
- Wo wird die Yacht eingesetzt? Im Mittelmeer, in der Karibik, in der Nordsee oder unter Bedingungen, die eine ganz andere Technologie erfordern?
- Welchen Nutzen hat das Boot? Ist es für den Einsatz unter anspruchsvollen Arbeitsbedingungen, zur Beobachtung von Walen, für gemütliche Kreuzfahrten um die griechischen Inseln oder zum Angeln in den Gewässern jenseits der norwegischen Küste gedacht?
- Rumpfdesign. Ist der Rumpf für hohe Geschwindigkeit oder Verdrängung ausgelegt?
- Gebrauch. Wird das Schiff für Langstreckenfahrten mit konstanter Geschwindigkeit, zum Trolling oder hauptsächlich zum Stillliegen vor Anker genutzt?
- Budget. Wie hoch ist mein Budget für ein Stabilisierungssystem?
Download installation guide
- Fin positioning
- Component layout in the vessel
- Installation and measurements
- Hydraulic and electrical installation
- Hull forces and reinforcement
A brief overview of active systems
Active tanks
Due to their bulky construction and costly assembly, they are mainly used on large bulk carriers, tankers, and LNG carriers. In active rolling tanks, the movement of the water is controlled by pumps or by the air pressure above the water surface. When the water is forced against the power of the waves, it provides stability. Active tank stabilizers can leave an efficiency of 80 percent or more in motion stabilization, depending on the system's sophistication. However, it requires so much onboard space that it will not apply to the vessels we focus on.
applicable to the vessels we focus on.
Gyro stabilizers
Gyro stabilizers can be installed in smaller boats and are commonly used in larger ships and carriers. Large boats may require more than one gyro stabilizer. Gyro stabilizers utilize the physical laws of precession to counteract sea motions. The gyro spins and tilts fore and aft as the boat rolls, creating a torque that reduces roll. The first large ship with gyro stabilizers was the USS Henderson, completed in 1917, which had two 25-ton and nine-foot diameter flywheels.
Active fins
Active fins are fitted outside the hull. Sensing the rolling motion of the ship, a gyro sensor sends a signal to the actuating system. This causes the fins to move in a direction that counteracts the roll. The bigger the boat and the longer the lever between the center of gravity and the fin, the more power it gives. The active fins get stronger the bigger and wider the boat is. Fin stabilizers are vastly more efficient at higher velocities, while they lose effectiveness when the ship travels at minimum speed. At low speed or anchor, stabilization-solutions include actively-controlled fins. The first use of fin stabilizers on a ship was on a Japanese cruise liner in 1933.
The video below shows active fins and their impact on the hull's movement in 0,5-1 meter high waves at zero speed:
Which stabilizer system is the right choice for you?
It ultimately depends on your preferences and intended use. Both active fins and gyro stabilizers have their pros and cons.
When at anchor, both technologies offer a similar effect on reducing roll and sway. However, active fins may cause some noise from the anchor chain and have a slight impact on moving the boat forward under very light wind conditions due to their flapping/swimming motion. On the other hand, gyro stabilizers may create noise pollution onboard due to their high-speed spinning below deck.
The startup time for gyro stabilizers can take 30-45 minutes before delivering full effect, while active fins are active immediately after being switched on. Repairing submerged fins can be more challenging, resulting in increased repair costs. In contrast, the gyro stabilizer is located safely inside the hull, reducing the risk of damage. However, servicing the gyro stabilizer may require taking the whole gyro-wheel out, depending on the manufacturer's construction.
Gyro stabilizers do not require protrusions from the hull, making them less susceptible to damage from grounding or floating debris. Fins, conversely, can correct small steady/static heels or lists due to beam winds, off-center weight, or extended period rolls running downwind, thanks to their ability to apply a steady lift force under the hull while the vessel is in motion. Gyros cannot supply constant forces, making them unable to correct a heel or list angle over longer periods.
The power impulse of a gyro stabilizer is firmly defined, while the force from active fins is an exponential result of speed (V^2). This means that fins have very high power at high speeds. Additionally, modern actuator systems for fins have a low built height, allowing you to spread the gear around the boat. In contrast, gyro stabilizers come as one big box, which can be space-demanding.
Real stories from happy boaters: Vector Fins™ in action
The best way to understand the benefits of a stabilizer system is to hear from those who have already experienced them. We've gathered a range of testimonials from boat owners and captains who have installed stabilizer systems on their vessels, and the feedback is overwhelmingly positive. From smoother rides in rough seas to improved comfort and safety for passengers and crew, these systems have proven to be game-changers for those who spend significant time at sea. In this section, we'll share some of these testimonials to give you a sense of what it's like to have a stabilizer system onboard.
A game-changer for luxury yachts
John Maxey, the owner of the luxurious Fairline Squadron 78, faced significant challenges with stability and comfort on his vessel, especially during rough sea conditions. To tackle this issue, he installed Vector Fins™ stabilizers from Sleipner. The results were impressive, with the system significantly improving his boat's stability and comfort. In the video below, John shares his experience:
The efficient solution for smaller boats
Captain Richard Kennedy of Anna J explains how Vector Fins™ has revolutionized roll reduction by providing more efficient stabilization with reduced side effects. Learn how Vector fins™ has become the go-to choice for smaller boats seeking an ideal solution for cruising and anchor stabilization in the video below:
The versatile solution
According to professional yacht broker Jimmy Rogers, fin stabilizers are versatile, handling both cruising and at-anchor use. The size of the fins determines the "at-anchor" stabilization force. Larger fins provide higher stabilization force but create more drag, resulting in higher fuel consumption, which can be a decisive factor for most boat owners. Larger fins can also make it more challenging to install the internal components in an optimal position, resulting in negative side effects like causing yaw and sway. Thus, most fast boats today compromise on fin size, resulting in insufficient stabilization for some owners.
Read his full article summarizing the pros and cons of fins and gyros here.
Installation and planning of a stabilizer system
When planning to install stabilizers, it is essential to consider the hull's design and ensure it can handle the additional load and strain. Softening the hull to comply with the minimum stabilizer requirements can provide greater freedom and a more fuel-friendly hull.
The smaller fins can achieve the same stabilization force as bigger flat fin systems while reducing the internal component size, resulting in more efficient stabilization and reduced fuel consumption.
Overall, the choice between active fins and gyro stabilizers depends on personal preferences and specific needs. However, Sleipner's Vector Fins™ offer a superior solution for smaller, fast boats with their improved efficiency and reduced side effects, providing better stability and comfort for all types of cruising and anchoring situations.
What is the cost of a functional stabilizer system?
The price of installing a stabilizer system on a boat can vary based on factors such as whether the boat is new or used, as well as the design characteristics of the vessel. Typically, the cost of a stabilizer system ranges from 2-4 percent of the boat's total cost. For a new 70-foot motor yacht, the complete installation of a stabilizer system could cost around GBP 70,000. Active fin systems have a smaller price range than gyros, as gyros weigh four times more than active fins, requiring hull strengthening and space for the two-ton gyro box.
It's worth noting that fins are generally not installed on boats smaller than 50 feet, while gyros can be fitted into vessels as small as 30 feet. Both systems can be retrofitted into a motor yacht, making it a smart investment for a proud boat owner who would rather install a stabilizer system on their ten-year-old vessel than buy a new one. The direct benefits of a stabilizer system are clear in terms of comfort and safety aboard, allowing usage of the vessel that would have otherwise remained docked. A stabilization system can be a wise financial investment for workboats, charter boats, and other vessels generating income by the hour. Furthermore, having a good stabilization system onboard can give a significant advantage in the market when selling or buying a secondhand vessel.
How to choose the right stabilizing system for your vessel?
To find the ideal stabilization system for your vessel, it's essential to research and evaluate the different manufacturers and technical solutions available. Each system comes with its own set of strengths, such as better performance at anchor or underway.
The final decision will depend on your vessel's intended use, design, hull limitations, and whether it's a new or retrofit boat. To help you make an informed decision, consider the following checklist (right) of critical features and performance points when selecting a stabilizer system:
- At anchor force
- Cruising force
- Reaction time at anchor (for smallest waves)
- Handling of long waves in cruising
- Dynamic heel in turns
- Speed and fuel consumption
- Weight versus stabilization force
- Space to install
- Instant on/off
- Stabilize while reversing
- Can operate without a generator when cruising
- Typical at anchor noise level
- Ease of service/repair if needed
- Geographical service points
At Sleipner, we offer advice based on your specific needs. Our preferred product, Vector Fins™, provides highly effective roll reduction both at anchor and underway.
There may be compromises when choosing a stabilizer system, but we strive to provide you with the best possible foundation for making that decision.
Talk to a stabilizer expert
If you're still unsure which stabilizer system best fits your vessel, consider talking to a stabilizer expert. They can help assess your needs and recommend the most suitable system for your boat. With years of experience and knowledge of the latest technology, they can guide you through the process of choosing and installing the right stabilizer system.
Our team of experts is always available to answer any questions. Contact us today to learn more about our Vector Fins™ and how they can improve the stability and performance of your vessel. Our resellers are also available worldwide to help you find the perfect solution for your needs. Don't let unwanted motion keep you from enjoying your time on the water. Invest in a stabilizer system and experience the comfort and safety it provides.