Cored hulls on boats



The risk of water entry into a cored bottom boat is obvious to most experienced boat owners. All it takes is for one improperly made screw hole to turn a boat bottom into mush. Take a look at the above photo that illustrates the results of what happens when water gets into a core. What you see there is the bottom chamber of the boat hull that was in the process of completely disintegrating. The reason is that once water gets into a core, a phenomenon called hydraulic erosion takes place. Due to the slamming and pounding of the hull bottom on the sea surface, water contained within a core will be compressed by the flexing laminate structure. Thus, the bottom literally becomes a diaphragm pump.