The steering wheel that controls the ship is often called the rudder, or the stern rudder. The stern rudder is the stern of the ship and mainly controls the heading. The reason why it is designed like a steering wheel is mainly because it is more convenient for mechanized operation. , The traditional cement boat is a stick-like handle to control the direction, if it is a big boat, it is very laborious.
Linked with the stern rudder is actually the oar, because the rudder itself evolved from the stern steering oar, but the stern rudder has made its operation more specific and standardized, greatly improving the efficiency of navigation, but there is no Out of this scope, in a word, the rudder is an advancement in ship technology.
The main principle of controlling the direction of the rudder is actually using its small aspect ratio, the principle and the flat plate or wing structure. When the rudder rotates, the force acting on the rudder blade can be divided into two different types. The force-the lift of the rudder and the resistance of the rudder, the lift of the rudder is perpendicular to the flow direction of the water flow, and the rudder resistance moves along the flow direction of the water flow, so it can be used to control the steering when the hull is propelled Effect.
The control of marine vessels is actually supported by propellers. The propellers will push forward a forward power, and the rudder mainly controls the direction of this power, so that it can move forward with the current. .