Purpose of open-water tests
• It is usually to carry out open water tests on standard series of propellers. Their features (such as # of blades, blade outline shape, blade area ratio, blade section shape, blade thickness fraction, boss diameter & pitch-diameter ratio) are systematically varied. The result data are summarized in a set of particular diagrams, which can be used for design purposes. We will study how to use these diagrams later for designing a propeller.
•Studying the efficiency of a propeller and find a propeller with better efficiency
•Studying the extent and development of cavitations over a propeller.