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

Late to the party, but I thought I would add a sub-question: If I have a boat with a 100HP motor, what gets me the better upgrade — twin 100HP motors or a single 200HP motor?

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