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

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Anonymous 0 Comments

for anybody who lives in the NJ/NY area, Liberty Science Center has an awesome exhibit that demonstrates this exactly. You can set up different numbers and shapes of propellers and blow air at it. It’s real cool.

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