Quasi-periodical evolutions such as shedding and collapsing of unsteady cloud cavitating flow. induce strong pressure fluctuations. what may deteriorate maneuvering stability and corrode surfaces of underwater vehicles. This paper analyzed effects on cavitation stability of a trip bar arranged on high-speed underwater projectile. https://www.unitedssports.shop/product-category/hockey-protective-elbow-pads-youth/