youtube.com/skunkbear
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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
Correspondent
Adam Cole
Senior Editor
Ben De La Cruz
![](https://i.ytimg.com/vi/emK-qIbuJ-k/mqdefault.jpg)