SHARROW PROPELLER™ vs Standard Stainless CAVITATION

Here we see underwater video captured on a test vessel. In the standard propeller shown on the bottom of the video above, the "bubbles" coalesce into the typical helical paths from each blade and show that the tip vortex is present. If a tip vortex were not present, the bubbles would simply break up and become a random distribution. Tip vortex cavitation (TVC) is not directly a function of tip speed, more of blade loading. At this operational point, the speed of advance is low, and the loading is high, so TVC at this point is very likely. The Sharrow Propeller™ (on the top) doesn't show any TVC.