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  • Human-Powered Helicopter: Straight Up Difficult

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    Explore the history of human flight here:

    It’s difficult to build a working four-rotor helicopter that spans 100 feet and only weighs 80 pounds. It’s even harder when your engine is a 0.7-horsepower person. But one team of engineering students is trying to do just that.
    Produced by
    Maggie Starbard
    Adam Cole
    Senior Editor
    Ben De La Cruz

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