Technical Information

Technical information Magnus RotorSwing

Magnus Rotor

The Magnus RotorSwing was invented by RotorSwing Marine. With many years of experience in the roll damping industry, we successfully have stayed ahead. It is our mission to provide you with the best possible roll damping while continuing to be ahead of the competition!


Below you will find a list of the Frequent Asked Questions about our Magnus RotorSwing. If your question is not on the list, please email us and we will make sure to provide you with a swift answer.

Q?   How is the performance of Magnus RotorSwing versus a Gyro system?

Gyro stabilizer systems work great for smaller and lighter vessels such as fishing boats. However, the gyro system rapidly goes up in size and price when you have a vessel of decent size and weight. The same RotorSwing system will both work for small boats as well as yachts up to 110'.
The Gyro stabilizer system doesn't function well at higher speeds.

Q?   Why is the RotorSwing more efficient than stabilizer fins?

As an example, we take a Linssen Grand Sturdy 500 15m motor yacht.
For optimal roll damping in bad weather at a cruising speed of 9 knots, this boat needs 2 fins measuring 0.8m². See the attached calculation further down on this page. However this size of fin cannot be installed because the fins would protrude below and on the sides of the vessel. The fin system then has to be limited to 0.7m². That is 15% less! Even with the limited fin area, the captain has to watch out and be careful when navigating in shallow waters. There is an increased chance the fins can be damaged.
For certain vessels, we have noticed that a RotorSwing system is up to 2.1 times more efficient compared to stabilizer fins.

Q?   How is the unwanted steering effect for the Magnus RotorSwing?

Since the RotorSwing is based on the Magnus effect, which consists of rotating cylinders, rather than a fin (which is basically a ruder), it has a steering effect close to zero. This is a huge benefit while cruising your vessel.

Q?   I heard rumors that even 1 RotorSwing outperforms many other stabilizing systems. Is that true?

RotorSwing Marine has done extensive research and testing while challenging the system under different drastic varying circumstances. In mid 2014, we performed a test on rough waters with only one RotorSwing. We were surprised to witness a roll damping of over 80 percent! From that time on, we have sold several RotorSwing stabilizing systems with only one rotor.

Q?   What exactly does the “Rake” function do?

The RotorSwing can be supplied with the patented "Rake" function whereby the rotors are automatically set at the correct angle while cruising to reduce drag.

Q?   I don’t have a lot of space for stabilizer installation. How flexible is the RS system in terms of space requirements?

The RotorSwing stabilizer system is extremely flexible in terms of installation placement. Since it lacks the unwanted steering effect that other stabilizers have, the RotorSwing can be mounted towards the aft (rear) of the yacht. We have installed many systems under the captain's bed where we normally find sufficient space.
Since the RotorSwing roll damping system is so flexible in terms of installation, it has become a huge selling point for the company.

Q?   Is the RotorSwing stabilization system silent?

Since the system is fully electric, it has an extremely silent operation. This is especially relevant when you purchase the ZeroSpeed system.
Imagine you are laying with your yacht for anchor and hear constantly loud noise coming from the engine room - which is common with many hydraulic systems. This would spoil the pleasure of yachting.
The RotorSwing ZeroSpeed is silent and extremely effective both while cruising and while for anchor!

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