GMS Rotors are an auxiliary wind-assisted propulsion system that reduces fuel consumption by providing additional thrust to the ship and ultimately reducing the fuel consumption by requiring less engine power for the same speed. Rotors not only reduce the Opex of the vessel but also improve the EEDI and lesser emission of greenhouse gases.

 PRINCIPLE

It works on the Magnus effect; technologies are in use since 1920. The Magnus effect is a particular manifestation of Bernoulli's theorem: fluid pressure decreases at points where the speed of the fluid increases In the case of a ball spinning through the air, the turning ball drags some of the air around with it.

First described in 1852 by Heinrich Magnus, the Magnus effect is a force generated by a spinning object traveling through a viscous fluid. The force is perpendicular to the velocity vector of the object. The direction of spin dictates the orientation of the Magnus force on the object. The orientation of the force can change but it is important to remember that it is always perpendicular to the direction of the fluid. The thrust created by the rotor will be transferred to the hull and would assist the vessel in propulsion

 ROTOR SELECTION

GMS can closely work with the owner and help them to decide the best suitable model for the intended vessel. Depending on the size, type, and route of the vessel. GMS would propose the best suitable model. While deciding the model we also take into consideration of vessel max height/draft / available power etc. Bigger rotors can generate more thrust but are not always possible to install on the smaller vessel due to available space and power. We have a fixed design of a 3,4,5 meters diameter rotor and can customize the height/diameter if the type/size/route of the vessel demands. We are open to discussion and would advise the best option for the owner to decide after the feasibility study.

The height of the foundation is vessel specific but usually varies between 1.5-3m. This should be added to the Rotor’s height when considering the air draft increase due to the Rotor. The weight of the foundation is vessel specific and below should only be considered as a rough estimate of what to expect.

 OPERATION

GMS rotor’s power requirement is very less in comparison to various other makers.

Continuously monitoring the speed and direction of the wind, change the rotation direction and speed to optimize to have maximum output (thrust) at minimum power

 PERFORMANCE AND FUEL SAVING

The data shows approximate saving on the wind speed and direction, as can be seen from the diagram that it has the capability to produce thrust in the FWD direction in most of the cases. Rotational direction and RPM will be automatically controlled by our control system to have maximum saving and efficiency. In favorable wind conditions saving up to 10- 15 % can be easily achieved.