PropSlipCalc 25112015

Understanding your propeller's slip can be relevant, but primarily in contexts where precision in performance metrics such as thrust is essential.

Slip is often misunderstood within the realm of propeller terminology, perhaps due to its connotation of undesirable performance. In fact, slip is not a direct indicator of propeller efficiency. Instead, it represents the difference between the actual distance traveled by the vessel and the theoretical distance based on rotational speed, arising from the necessary blade angle of attack. If a propeller blade had zero angle of attack, there would be no slip; however, in such a scenario, no positive or negative pressure would develop on the blades, resulting in no thrust generation.

The Mercury Racing Prop Slip Calculator provided below offers a practical means to quickly assess propeller slip and analyze its implications for your specific application.