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MEO CLASS 1 · ORAL QUESTION 63

Propeller curve diag -X and Y axis and what does it represent

Answer

In the propeller curve diagram, the X-axis represents engine or propeller rpm and the Y-axis represents propeller power or engine power, generally in kW or percent MCR. The curve shows the power absorbed by a fixed-pitch propeller at different speeds. For a given propeller and hull condition, power varies approximately with the cube of rpm, P∝N3P \propto N^3.