Stabilizer

Stabilizer

 

Stabilizers

Stabilizers are hydraulically driven fins that mount on your boat so when the boat rolls, the fins turn like a rudder providing a greater amount of stability. The faster the speed, the more effective they are. Conversely, a fairly new type of stabilizer is an “at rest” stabilizer that provides smoother anchoring. Although different companies make stabilizers with their own slightly different features, they are all, for the most part, the same in effectiveness.

Yacht size

Larger yachts tend to benefit the most with stabilizers. For boats under sixty feet the appropriate amount of power is not always available. Even so, many boats that are forty feet come with or are retrofitted with stabilizers. It is wise to proceed with caution though, because by virtue of the size the generator needed could be so noisy that it makes the time on the boat less enjoyable.

Power

It is important to have enough power to run everything. On a generator, often you will have a clutched PTO drive so that instead of using the generator to supply electricity, you would use it to drive the hydraulic pump, or a percentage of both. A larger boat may start up a generator for electricity, and second generator for hydraulic power.

Without stabilizers

There is a big difference between a boat that has stabilizers and one that does not. It is not so much that you notice them when they are activated, but when they are not, their absence is quite apparent.

Necessity

If you are planning to ever take your boat out into the Strait of Juan de Fuca, you will definitely want stabilizers. They will make the whole experience much more enjoyable. Your guests will be able to cruise in comfort, rather than being tossed around your boat for the whole trip.

Installation

One of the biggest concerns is finding space for stabilizers. It is best to place them in the middle of your boat. If it is already designed into your boat, it is easy, because there has been some thought put into it. If not, the hull has to be beefed up. The boat will need a good inch of thickness on the bottom. Sometimes factories will have that area already thick enough, so checking on that when buying the boat, or when coming in for a consultation it is good to discuss that topic. On the occasions when there is no space for the fin, they can be a little offset. The upshot of that is that the unevenness has no impact on the performance, and it is unnoticeable when the vessel is in the water.

Drilling

Usually, boats will have an inner and an outer plate and the stabilizer is bolted like a sandwich between the plates. There is a part of your boat that is called the “actuator,” which is the shaft and the hydraulic components. Your boat will have a fin that bolts to that.

Maintenance

Stabilizers are fairly low maintenance. They can often go two to three years before the zincs corrode away. You do want to re-zinc your boat once a year, though.

Practicality

Every yachting situation is different, so having a candid conversation at consultation is a smart way to go. You don’t want to install something that you really don’t need. The cost of the system and whether you are looking for higher re-sale value as well as how you are going to use the boat will have a great deal to do with your level of satisfaction. For example, if you are only going to keep the boat on a lake, you might want to consider not installing a stabilizer at all.

Seaways

Stabilizers are ideal in any type of seaway. Modern stabilizers have an electronic control, rather than a hydraulic gyro, that responds well to just about any setting. While cruising, you can easily correct your keel, you have great control. You can vary the speed of the reaction time of the fin, like say, if you have a higher speed boat and are cornering. Stabilizers do not only have to be for slow boats, contrary to popular belief, the faster that you want your boat to go, the smaller the fin requirement.

Operation

Stabilizers are the type of thing that you tend to keep on all of the time. When the boat slows down to a certain speed, the stabilizers will go into an “in-lock,” so when, for example, you pull into the marina, you don’t need to be concerned about turning the stabilizers off for fear of damage. Backing up is when to be the most aware, because you don’t want the stabilizers and the rudders fighting each other, so the stabilizers need to be put into neutral.

Construction

Most boats that get stabilizers are made of synthetic material, but a wooden boat can have stabilizers installed. There is one that was installed by Townsend Bay Marine that is still going great fifteen years after the initial installation. Wooden boats may take more time and caution, but it is entirely do-able.