All your questions answered here
Gyrostabilizers have the potential to produce up to 99% roll reduction. The roll reduction varies with the wave height, the wave period and with the characteristics of each vessel. Typically in up to moderate seas, you can expect to see 60-70% roll reduction with a VEEM Marine Gyrostabilizer. As the sea state increases, reduction will back off slightly. We size our systems effectively to produce similar performance to a fin system when underway. When the vessel is travelling slowly, or at rest, the performance is outstanding, you can be guaranteed a 90% roll reduction.
The selection of gyrostabilizer size for various superyachts depends on the displacement of the yacht, the GMT and the wave profile. A heavier yacht with a higher GMT requires a bigger gyrostabilizer. The most accurate way to find out which VEEM Marine Gyrostabilizer size you need is to fill out the VEEM Gyro Size Calculator. This calculator will give you an instant report based on your vessel information.
A VEEM Marine Gyrostabilizer can be mounted anywhere on the vessel within structural reason. Effectively, anywhere where there is adequate structure in the ship to hold the gyrostabilizer down it can be mounted. It does not need to be mounted on the vessel centerline. VEEM Marine Gyrostabilizers do not need to be mounted low in the vessel. Preferably, we would mount them aft of midships to avoid slamming accelerations, but they can be mounted forward. Essentially, there is no limitation to where the gyrostabilizer can be mounted. Typically, they will be mounted in the engine room because there are structural supports already in place, there’s lagging in place, and there’s power and other auxiliary systems already in the location.
The VEEM Marine Gyrostabilizer is driven by an electric motor, so they require a three-phase power supply. The power requirements vary with the size of the unit, but typically that power is a small fraction of the power consumed by the thrusters. Our experience has been that there is more than adequate power available. If you contact us, we’ll come back to you with what the power requirements are for a system suitable for your vessel.
VEEM Marine Gyrostabilizers vary in size and weight depending on the size and weight of the vessel. Typically, a small gyrostablizer system will weigh approximately 2.5% of the displacement, or the weight of the boat. A large system would weigh in the order of 5% of the vessels displacement. The small versus large decision really depends on what the requirement for the gyrostabiliser is. If it is a complete stabiliation system for rough weather at speed, you might be looking at a weight of 5% of displacement. If it’s just to keep the boat from rolling in moderate to small seas, you might use a 2.5% of displacement installation. Contact us and we can come back to you quickly with an estimate of what your vessel required.
VEEM Marine Gyrostabilizers produce large torques in a small space, and that is the beauty of the device. That means that the gyrostabiliser needs to be mounted on structural mounts similar to engine beds. Our advice is to contact us with information about your vessel. We will send you back the loads that you will expect to see on your vessel. Following this, it would be best to contact the shipyard that built the vessel, or contact a consulting naval architect that will provide you with information as to the sizing and design of the mounts.