What does the pitch of a propeller refer to?

The pitch of a propeller specifically refers to the distance a propeller would move forward in one complete revolution, assuming no slippage through the medium, such as water or air. This concept is similar to the thread of a screw; just as a screw moves a certain distance forward with each turn, the pitch denotes how far a boat or aircraft would theoretically advance with one rotation of the propeller.

Understanding pitch is crucial when considering a propeller's performance because it directly affects the thrust and efficiency of the vessel or aircraft. A higher pitch generally means that the propeller can move the craft faster but may require more horsepower or torque to do so effectively.

While diameter, blade angle, and weight distribution are significant factors in propeller design and functionality, they do not define what pitch is. Diameter relates to the overall size of the propeller, the angle of the blades affects lift and drag, and weight distribution influences balance and strength. However, none of these factors provide insight into the specific measure of forward distance represented by the pitch.