When a ship needs to change course, the servo system activates the rudder stock's rotation via a transmission mechanism, such as a hydraulic or electric system. The rotating rudder stock moves the rudder blades, which then pivot in the water. As the rudder blades rotate, they alter the flow of water, creating a hydrodynamic force perpendicular to the flow direction. This force generates a turning moment at the ship's center of gravity, causing it to rotate and change its course.
Flat rudder is a type of rudder with a relatively simple structure, and its rudder blades are a flat plate, usually made of steel plate.
The upper and lower ends of the rudder blade are respectively connected to the rudder stock and rudder base, and the rudder stock is connected to the hull through the rudder support.
The rudder blades of a streamlined rudder have a streamlined shape, resembling a wing.
The rudder blade is usually composed of multiple curved surfaces with different curvatures, and there may be reinforced structures inside to ensure the strength of the rudder blade.
The rudder blades are connected to the hull through the rudder stock, which can be arranged in various forms such as single rudder stock or double rudder stock.
In emergency situations, such as sudden adverse weather, mechanical failure, or close range threats from other vessels, the rudder system can help the vessel quickly make evasive actions.
For example, when an obstacle suddenly appears in front of the ship, the crew can quickly turn the rudder blades to change the ship's course and avoid collision accidents. The rapid response and effective maneuverability of the rudder system are key factors in ensuring the safety of life and property of ships in emergency situations.
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