Ship Propellers Explained

This course provides a detailed introduction to the ship propeller, a critical component responsible for converting rotational power into thrust to move a vessel through water. Drawing on principles of hydrodynamics, material science, and mechanical power transmission, the course explains how propellers are designed and how they function in real-world applications.

You’ll explore the construction of a propeller, including the hub, blades, and the use of corrosion-resistant materials such as bronze and stainless steel. The course explains how twisted airfoil-shaped blades generate pressure differences that result in forward motion.

You’ll also learn about key operational concepts such as blade pitch, and how it affects speed, efficiency, and torque requirements. The differences between fixed pitch and controllable pitch propellers (CPP) are clearly explained, along with their respective advantages and applications.

Additional topics include blade design factors such as skew, rake, and number of blades, as well as important phenomena like cavitation, which can impact performance and cause damage. The course also highlights specialized propeller types such as ducted propellers and thrusters, and how propeller design is adapted for specific vessel requirements.