IMPROVED CAVITATION PERFORMANCE:Theoretical models give a cavitation inception speedof 30% higher for the composite propeller design,compared with the original NAB propeller. The useof the lighter composite materials meant that theblades could be thicker without significantly addingto the weight of the propeller. Thicker blades offerthe potential for improved cavitation performance, soreducing vibration underwater signatures. Thecomposite propeller is expected to last for thelifetime of the vessel where as a NBA propellerwould be expected to suffer cavitation erosion andcorrosion and needs to be replaced periodically.
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