The propeller blades are the key components responsible for generating thrust. Typically twisted in shape, they extend outward from the hub. Propellers usually have 3 to 6 blades. The hub connects the blades to the ship's power shaft, playing a crucial role in transmitting power to the blades, ensuring stable rotation.
Larger - diameter propellers generally have better fuel efficiency at lower speeds. This is because a larger propeller can move a greater volume of water with each rotation, generating more thrust with less energy loss.
The diameter and pitch of the propeller are key factors that affect the propulsion force and thus the speed of the ship.
Generally speaking, propellers with larger diameters can push more water and generate greater thrust at the same speed.
The pitch determines the theoretical distance the ship advances for each revolution of the propeller. The appropriate pitch can enable the propeller to effectively convert the power of the main engine into propulsion at different speeds.
For example, for a high-speed vessel, a larger pitch and appropriate propeller diameter can generate sufficient thrust at higher speeds, thereby increasing the vessel's speed.
English