Why do fans (and propellers) have different numbers of blades? What advantage is there to more or less blades?

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An actual question my five year old asked me and I couldn’t answer, please help!

In: Physics

25 Answers

Anonymous 0 Comments

On top of all the replies you’ve already got, look up Betz’s law. Basically says that there is a limit to the efficiency of a wind turbine blade, only 59% of input energy can be recovered

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