How To Understand The Speed Of Marine Propeller?

In fact, the rotational speed of marine propeller is not necessarily as high as possible. It depends mainly on the output power of the engine and the structure of the propeller. It is also useless to assume that even if the power of the engine is very high and the rotational speed is very high, the blade is also very large, but the blade design is not suitable for the structure of high-speed water flow.
It depends on many factors such as the size of the ship, the engine output power, the high waterline, the ship's fluid resistance and so on. Generally, high-speed propellers and low-speed large propellers are suitable for ships with small tonnage of more than 800 rpm, and the latter 300-450 rpm. If the engine power is small, medium-sized cargo ships are generally 300 rpm, In fact, the higher the speed is, the better it is. It depends on the output power of the engine and the structure of the propeller. It is useless to assume that even if the power of the engine is very high and the speed of rotation is very high, the blade is also very large, but the blade design is not suitable for the structure of high-speed water flow.