Stone Marine Cap Fins
Stone Marine Cap Fins are very effective bolt on devices that can improve propulsive efficiency by 2% or more. Available as a retro fit to an existing propeller, or as part of the package with a new one, the fins are designed to regain the rotational energy losses of the propeller.
Propellers create a twisting column of water behind the hub, but the fins capture this otherwise wasted energy resulting in a very worthwhile efficiency gain and corresponding fuel saving for a very modest capital outlay.
Virtually any type or size of vessel can benefit from Cap Fins and each Cap Fin is custom designed to suit the ship and hydrodynamically optimised for the propeller and the operating profile of the vessel to which it is being fitted.