What is a counter-rotating rudder?

A counter-rotating rudder propeller is a specially designed propeller in which the two blades rotate in opposite directions. The product has the characteristics of high propulsion efficiency, low noise, good operability, anti-entanglement and so on. It is widely used in ferries, tugs, engineering ships and ships with high maneuverability requirements. It is an ideal Marine propeller.

On a ship, the purpose of the counter-rotating rudder propeller is to quickly change the ship's course. Traditional propellers, whose two blades rotate in the same direction, require a larger steering Angle and a longer distance when changing course. The counter-rotating rudder propeller, because the two blades rotate in opposite directions, can make the ship turn quickly, reducing the space required for steering.

The working principle of counter-rotating rudder propellers is based on the principle of force and reaction force. When two blades rotate in opposite directions in the water, the thrust they generate acts in opposite directions, allowing the boat to turn quickly. At the same time, because the two blades rotate in opposite directions, the mutual interference between them is also small, which helps to improve the efficiency of the propeller.

It should be noted that the design and manufacture of counter-rotating rudder propellers is more difficult, so its manufacturing cost is higher.

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